36 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. 



List of specimens of Hynobius idqrescens. 



Muscmn. 



Sci. Coll. Tokyo.. 

 Do 



No. 



57a 

 52a 



Sex. 



Male a ... 

 Female 6. 



Locality. 



Sendai, Hondo. 

 Nikko, Hondo. 



When 

 collected. 



By whom 

 collected. 



mm. 

 14 

 11 



a Type; description, p. .34: figs. 27-32. 



b P. .35. 



HYNOBIUS LICHENATUS" (Boulengeri. 



Plato IV, tigs. 1^3. 



1883. Hynobius lichcnatus Bollenger, Ann. Mag. Nat. Hist. (5), XII, p. 165, pi. 

 V, fig. lb (type-locality, Aomori, Hondo: type in Brit. Mus.; G. Lewis, 

 collector); Proc. Zool. Soc. London, 1886, p. 413. 



With the permission of the authorities of the British Museum I 

 examined the hitherto uni(iue type of this species in 1898. It is 

 chiefly characterized by possessing only eleven costal grooves and only 

 a rudiment of the fifth toe, which is but slightly larger than the one 

 in //. peropus. Moreover, the vomerine dentition is quite peculiar 

 m forming only a slight median posterior prolongation. If this 

 character is normal, H. lichenatus is the most distinct species in the 

 genus. Its eleven grooves and compressed tail otherwise bring it near 

 to H. nigrescens, which, however, has a well-developed fifth toe. 



Boulenger's original description is herewith appended. 



Description of type-speciTnen. — British Museum; Aomori, Hondo; 

 George Lewis, collector. — In the shape of the series of palatine teeth 

 intermediate between Hynobius and Onychodactylus; these series 

 form a zigzag row, the central or posterior angle not extending poste- 

 riorly beyond the extremity of the outer branches; head large, 

 depressed, as broad as long; snout short, rounded; eyes rather large, 

 prominent; no labial lobes; body short, a little more than thrice the 

 length of head; the distance from snout to gular fold contained a 

 little more than twice and a half in the distance from latter to cloaca; 

 limbs moderate ; when laid against the body the fingers cross the toes ; 

 fingers a-nd toes moderate, depressed; fifth toe rudimentary, as in 

 Hynohius peropus; tail about as long as head and body, strongl)" 

 compressed and keeled superiorly and inferiorly, ending in a blunt 

 point; -skin smooth, sliining; eleven costal grooves; a median dorsal 

 groove; ])arotoids rather indistinct, porous; gular fold strongly 

 marked; a distinct groove behind the angle of the jaws. Brown 



o Covered with lichens, referring to the "lichen-like grayish variegation" of color. 

 & Reproduced in this work on Plato IV, fig. 1-3. 



