468 DUNN. 



Type Locality: Sakaehama, east coast of Sakhalin. 



Range: Sakhalin. 



Diagnosis: A Hynobius with long, flat tail; moderate vomerine 

 series; 13 costal grooves; 4 toes; black. 



Description: Quoted from Andersson (1917). " Vomero-palatine 

 teeth in an angular series; the median arms which converge behind 

 form an acute angle, and equal one-half the width of the tongue; the 

 lateral branches, of about half the length of the inner ones, form right 

 angles with the latter. Head flat and broad; nostrils about halfway 

 between eye and tip of snout, their distance from each other more 

 than the interorbital width. Eye rather large, the upper eyelid con- 

 siderably longer than the interorbital space. Body moderately 

 elongate; distance from tip of snout to gular fold contained three 

 times in distance from gular fold to anterior border of vent. Ad- 

 pressed limbs just meeting; fingers and toes four on each foot, short, 

 broad, and depressed; toes with a rudiment of web at the base; outer 

 finger very small, second and fourth of about similar size, third much 

 the longest and broadest; of toes, the outer (fourth) as long as but 

 somewhat narrower than the innermost (first), both much smaller 

 than second and third, of which the latter is somewhat longer and 

 narrower than the former. No trace of a fifth toe. Tail long, as long 

 as head and body, very compressed in its whole length, tapering, 

 obtusely pointed at the end, crested by a high dorsal and a lower 

 ventral fin, both bordering the whole tail. Thirteen distinct costal 

 grooves, twelve abdominal ones, the inguinal not continuing across 

 the belly; median dorsal groove not distinct. A large, very distinct 

 parotoid gland; a distinct postocular groove continues along the 

 upper and posterior margin of the gland to the gular fold, which is 

 very distinct. Vent a longitudinal slit with a broad triangular flap, 

 directed forwards, protruding between the anterior parts of the very 

 swollen lips, and forming a kind of roof over the external opening. 

 Colour black, except on the chin and throat to the gular fold, which 

 parts are brownish white, and on the breast and under parts of limbs, 

 which are brown. 



Dimensions of the single specimen, which is a female. (Ba. ex. 

 302). Total length 110 mm., head 14, gular fold to anterior angle of 

 vent 41, anterior angle of vent to tip of tail 55." 



Remarks: I am inclined to believe that the sex is wrongly deter- 

 mined. The modification of the vent described above is a male 

 character. 



This animal occupies territory between the ranges of H. keyserlingii 



