192 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. 



of the cliaracters noted hj liini are now obliterated. Yet, what is left 

 seems to show that the specimen does not belong to any now recog- 

 nized genus and species, and also that Hallowell's description, which 

 I reproduce verbatim below, is fairly good. 



The dentition is now the most prominent feature, the compara- 

 tively enormous tricuspid molars standing out in bold relief. They are 

 eight in number on each side in both jaws, gradually increasing in 

 size backward; in the upper jaw there are, besides, three "incisors," 

 the median largest, and a small hardly differentiated "canine" on 

 each side of these; in the lower jaw there are three conical "incisors" 

 on each side in front of the molars, the middle tooth on each side 

 being largest. The dental formula consequentl}^ looks like this: 



8+1+3+1+8 

 8+3+3+8 

 For comparison I append that of the type of Japalura polygonata: 



14 + 2 + 5 + 2 + 14 

 14 + 3 + 3 + 14 



The small number of molars in both jaws is probably due to the 

 youth of the specimen, as Siebenrock has shown that in some Agami- 

 dx the number varies between 8 and 21, according to age,'^ but the 

 difference in the number of incisors is not so easily explained, for it 

 seems, according to the same authority,*^ as if the young animals have 

 even more incisors than the adult, a condition reversed in the Japa- 

 lura and the uncertain young Agamoid before us. 



A young specimen of Japalura sivinlionis (U.S.N.M. No. 34097), 

 from Formosa, though more than once and a half as large as Hallo- 

 well's specimen, corroborates the above. In the upper jaw it has nine 

 "molars," two "canines," and four "incisors," consequently essen- 

 tially like the adult, only fewer molars. 



Hallowell's description is as follows : 



OTOCRYPTIS Weig. 



Among the saurians in the Loo-Choo collection is a very small Aerodont Igiianian, 

 no doubt a young animal, which appears to belong to a genus very near if not identical 

 with the Otocryptus of Weigmann. The form of the head, however, is different from 

 that of Otocrj^tus, as described by Dumeril &. Bibron, and the number of molar 

 teeth is less, viz.'. — eight instead of twelve. The specimen, small as it is, is much 

 mutilated, and otherwise injured, but the following characters can be distinctly made 

 out. 



Gen. char. Head rounded, and high posteriorly, the anterior slope more gradual 

 than the posterior, the front and vertex being nearly on a line; snout covered with 

 polygonal scales; supraorbitar ridges distinct; eyelids covered with carinated scales 

 of nearly equal size; occiput covered with polygonal scales, partly smooth, partly 

 carinate; temples covered with carinated scales; eyelids covered with small scales. 



oSitz. Ber. Akad. Wiss. Wien, Math.-Naturw. CI., CIV, Pt. 1, p. 1116 (Nov., 1895.) 

 6 Idem, p. 112L 



