HYNOBIIDAE. 457 



series equal in length to distance between outer border of naris and 

 peak of opposite series; yellowish brown above, light gray below, 

 heavy mottling of irregular black spots above; total length 101 mm., 

 head 14, body 46, tail 41. 



A young specimen, Cal. Acad. Sci. No. 32126, same data, has 12 

 costal grooves; appressed toes meeting; head width 4| in length 

 from snout to vent; light grayish brown above, with mottling of dark 

 brown; scattered white flecks; cream color below with gray mottling; 

 tail much flattened, finned above; traces of recently resorbed gills at 

 sides of neck; total length 47 mm., head 8, body 21, tail 18. 



A larva, Cal. Acad. Sci. No. 32154, Chiksan, Korea, shows a light 

 grayish brown dorsal surface, the sides and belly being white. Back 

 and sides are marked with small irregular black spots. The dorsal 

 fin reaches forward past the middle of the back. Total length 53 mm., 

 head 8, body 23, tail 22. 



A female from Wonsan, Korea, Cal. Acad. Sci. No. 32168, has the 

 inner branch of the vomerine series equal in length to the distance 

 between the outer edge of the naris and the median line; this is the 

 case in three males from Chiksan (Cal. Acad. Sci. 32158-32160), and 

 in seven specimens from Kong-ju (Cal. Acad. Sci. 32161-32167). It 

 is closely approached by some of the Fusan specimens. 



Among 317 adults of this species, two (32048, 31934) have no fifth 

 toe; eight (31854, 31860, 31972, 32076, 32096, 35964, 35970, 31949) 

 lack this toe on one foot; 3200 has both fifth toes rudimentary; 

 31964 has the fifth toe of the left foot rudimentary. 



The costal grooves of 17 males are: 13 in 13 specimens, 13-14 in 

 one, and 14 in three. 



The count for 13 females is: 13 in twelve specimens, and 14 in one. 

 Of 11 young one has 12 costal grooves, the rest have 13. Thus some 

 85% have 13 costal grooves. 



In the young the legs are proportionately longer. Thus of 11 

 specimens the appressed toes meet in five, and are separated by one 

 costal fold in six. This proportionate leg length is somewhat less in 

 adult males, for five out of seventeen have the appressed toes meeting, 

 in ten animals they are separated by one costal fold, and in two indi- 

 viduals by two. Females have still shorter legs, as out of fourteen 

 adults seven have the appressed toes separated by three costal folds, 

 three by two costal folds, and four from Kong-ju have only one costal 

 fold between the appressed toes. 



Remarks : I have used this species for most of the anatomical work 

 f have done on Hynobius. 



