Lasiodromia coppingeri unidentata IHLE, which was originally recorded by IHLE from Timor Is. (1912, Siboga Expeditie monogr. 396, p. 51), has recently been obtained for the first time in Japan at Mitohama coast, near Misaki. It has a characteristic spine in the middle of the antero-lateral border, and a spinule at the junction of the antero-lateral and postero-lateral borders, so that it may safely be identified to IHLE'S subspecies. According to Dr. T. SAKAI, this subspecies has also been obtained by Mr. K. Suzuki, a member of our Carcinological Society, at Niijima, Izu Isls,

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The western part of Japan proper facing the Japan Sea is called the Sanin District, in which the Oki Isls. Are also included in this paper. The writer has been studying the crab-fauna of this district and its adjacent waters in spare times of his onerous duties, as the result of which 90 species of crabs are shown in the list of this paper. Of them 6 species are fresh-water crabs, while 84 species are marine consisting of 3 nothern forms, 50 southern forms, and 31 intermediate forms. Among 50 southern forms 22 species are distributed further northwards, for instance, they are found in the list of crabs of Toyama Bay. The occurrence of southern forms, such as Calappa lophos, C. philargius, Ranina ranina, Paratymolus sexspinosus, Neptunus (Neptunus) sanguinolentus, N. (N.) pelagicus, Atergatis subdentatus, Eucrate crenata, Ommatocarcinus macgillivrayi, Plagusia dentipes and others in the Japan Sea side has never been recorded up to now. These peculialities of the distributions coincide with the course and its largeness of the warm current along the coast of this district.

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タカアシガニMacrocheira kaempferi DE HAANは,日本列島附近(相模湾-九州)の比較的深海(50〜300m)に棲息し,現棲甲殻類中,世界最大の種類として知られているが,従来,その生態・生活史等に関する知見は,きわめて乏しい。1961及び,'62年,広島県立宮島水族館で,延べ12尾におよぶタカアシガニを飼育し,その間,本種の性行動について観察する機会を得たので,以下に,その詳細を述べる。

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An abnormality was found in the left cheliped of a female of Macroph-thalmus japonicus DE HAAN obtained at the mud-flats of Hiragata Bay in Yokosuka, Harbour, 1961. The abnormal cheliped is apparently smaller in size and lighter in colour than in the normal right cheliped. In this abnormal cheliped the immovable finger is rather normal in size and shape; at the base of this segment, a process of a good size is projecting at an angle of about 70°. This process looks like an appearance of the movable finger, however it has no articulation at the base; moreover, a small chela-like structure may be found at the proximal portion of the propodus, the chela being rather normal in structure and the movable finger is freely articulated against the immovable finger. These four finger-1ike processes (the original immoval finger, the dectylus-like process and the two fingers on the processes at the base) are found on the same plane, thus this abnormality seems to agree with Bateson's "super-regeneration".

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雄では第1幼蟹期に於てすでに胸部第8節に雄性生殖孔の開孔が認められた。腹肢はSHENのC. maenasでは第2幼蟹期で第1腹肢が認められるのに反し,本種ではすでに第1幼蟹期で認められ,第2腹肢よりも急進に成長する。雌では第1幼蟹期ですでに胸部第6胸節に雌性生殖孔が認められ,腹肢は腹部第1節には認められず,第2幼蟹期以後第2〜第5腹肢は分叉し,C. maenasよりも早期に雌性性徴の発現を示す。

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General features on the order Cumacea are described and illustrated. The species hitherto known from Japan are also listed herein. The following four species: Bodotria sp., Leucon sp., Schizotrema sp., and Campylaspis reticulata GAMO are also illustrated.

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