The fiber type profiles of the skeletal muscles (Musclus masseter, M. rectus capitis major, M. rectus capitis minor, M. complexus, M. trapezius, M. pectoralis major, M. triceps brachii, M. externus carpi radialis, M. rectus femoris, M. semimembranosus, M. gastrocnemius in Mauremys japonica, M. masseter, M. trapezius, M. latissimus dorsi, M. triceps brachii, M. extensor carpi radialis, M. obliquus extensor abdominis, M. obliquus internus abdominis, M. rectus femoris, M. semimembranosus, M. gastrocnemius in Gekko japonicus, and M. linguae, M. masseter, M. epaxialis, M. hypaxialis, in Elaphe quadrivirgata, Elaphe climacophora, Rhabdophis tigrinus) were examined histochemically. According to the enzymatic reactions, muscle fibers were divided into 3 main types; i. e., slow-twitch-oxidative (SO), fast-twitch-oxidative-glycolytic (FOG) and fast-twitch-glycolytic (FG) types. Moreover according to the intensities of various enzyme reactions, the 3 main types were subdivided into 11 subtypes in all, 3-5 types fibers were identified in the muscle of Mauremys japonioa, 4-6 types in Gekko japonicus, and 3 types in Elaphe quadrivirgata, Elaphe climacophora and Rhabdophis tigrinus. The ratio of the number of FG type fibers was higher than the other types fibers in Mauremys japonica and Gekko japonicus, but the ratio of FG type fibers was not higher in Elaphe quadrivirgata, Elaphe climacophora and Rhabdophis tigrinus. The diameter of muscle fibers was largest in FG type and smallest in SO type fibers. The pH stability of myosin adenosine triphosphatase (myosin ATPase) activity varied with the types of muscles, namely the range of pH stability at an acidic pH range in SO and FOG type fibers was more extensive than in FG type of fibers and at an alkaline pH range FG and FOG types fibers were more extensive than SO type fibers in the range of pH stability.

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Reproduction in females of the kanahebi lizard, Takydromus tachydromoides, was studied in Mito, Ibaraki Prefecture. Yearling females larger than 40mm SVL and not reproductive early in the reproductive season (April-May) might be judged to be mature because their largest unyolked follicles were the same size as those of reproductive females (1.3mm or larger). Most yearlings bred once or twice late in the reproductive season (June-July), and they had a mean clutch size of 3.0. Older females reproduced from April through July, and they had a mean clutch size of 4.2 for the first clutch and of 4.0 for the second and third. In this population the mean dry weight of oviducal eggs was 84mg, and the mean ratio of clutch weight to body weight was 0.729.

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Six species of reptiles and amphibians were collected on Hateruma Island, Ryukyu Archipelago, in March and in August 1981. They are: Microhyla ornata, Rana limnocharis, Hemidactylus frenatus, Eumeces stimpsoni, Scincella boettgeri, and Rhamphotyphlops braminus. Of these, the record of E. stimpsoni was the first one for this island. The specimens of this species, collected in March, included two yearlings both of which were already sexually mature.

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