1. Neoscona scylloides BOESENBERG et STRAND
The spider was collected by Mr. Y. Suganami at Mt. Tsuchidake on August 21, 1965. The general appearance is that of an adult male: chelicerae, carapace, spination of legs and the other parts are similar to a normal male. Both palpi are equally developed, but imperfect and anomalous. The tarsus has an alveolar cavity, but the genital bulb elongates cylindrically, without any complicated structure. Paracymbium is on the ectal side of the base of the tarsus, but its shape is simple and much different from a normal one. The abdomen has a scape of epigynum which is not fully developed as in the case of subadult female. Present spider seems to be a male slightly affected by female element, that is to say, this individual may be an intersexuality with a strong predominance of maleness.
2. Tetragnatha praedonia L. KOCH
The spider was collected by Mr. K. Murai at Yamaguchi City, on August 2, 1958. Subadult female. The right chelicera is normal, but the left one is very short, about a half of the right in length. This anomaly seems to be the result of regeneration of the left chelicera that was lost for some reason.
3. Coelotes antri (KOMATSU)
This specimen was collected by Mr. Y. Tarumi at Minoo City near Osaka on September 15, 1966.
This individual is clearly a subadult male, compared with another normal subadult male of the same color and shape as the former, both having been collected at the same place and at the same time. But each palp of the former shows anomalous development.
Left palp: patellal apophysis, tibial apophysis and cymbium are normal as in an adult male, but the genital bulb is not normaly specialized.
Right palp: shorter than the left palp; patellal apophysis is imperfect, and the tibial apophysis is developed anomalously; cymbium is short and thick; genital bulb is abnormal, differing from the left one and also from that of a normal adult male.
This spider may be a kind of abnormal neoteny, but since there is no clear evidence to determine so, it is described here as a case of anomaly of male palp.
