Vo.. III] VAN DENBURGH—NEW REPTILES AND AMPHIBIANS 51 
from Kanshirei. Boulenger has recorded the species from 
Fokien, China. 
Pseudagkistrodon new genus 
Maxillary teeth thirteen, moderate, subequal, followed, without an 
interspace, by two extremely large fangs. Dentary not movable on 
articular. Mandibular teeth subequal. Head elongate, moderately dis- 
tinct from neck. Eye large, with round pupil, completely separated from 
labials by a series of suboculars. Body stout; scales strongly keeled, in 
23-24 rows, without apical pits. Gastrosteges rounded. Anal divided. 
Urosteges in two rows. Tail moderate. Hypapophyses present through- 
out vertebral column. 
This remarkable new genus appears to be most closely 
allied to Macropisthodon. The maxillary bone is very short. 
The two long teeth lie horizontally and directed inward and 
backward, in such position that it is difficult to see how they 
can be used. Their posterior edges are sharp. The posterior 
portion of the palatine is much thickened. The quadrate is 
of extreme length. Externally the genus may be distinguished 
by the complete series of oculars surrounding the eye. 
The type and only known species of the genus is: 
Pseudagkistrodon carinatus new species 
Type.—California Academy of Sciences, No. 18003. Formosa. 
Description of the Type—General form rather short, moderately stout, 
head elongate, tail moderate. Rostral twice as broad as deep; internasals 
a little broader than long, nearly as long as prefrontals; frontal longer 
than broad, nearly as long as parietals, longer than its distance from end 
of snout; supraocular in contact with prefrontal; all upper head plates 
roughened; loreal very small; eye bordered in front, below and behind 
by a series of nine small plates; temporals 3-4, strongly keeled; supra- 
labials seven, fifth or sixth largest; infralabials nine, first in contact 
with its fellow; anterior genials smaller than posterior, in contact with 
first four infralabials; posterior genials separated from first gastrostege 
by one plate; scales very strongly keeled, in twenty-three rows, those 
of outer row nearly twice as large as those above; gastrosteges 141; anal 
divided; urosteges in two series, 64 and tip. 
Head uniform brown above, yellowish white below; rostral, sub- 
oculars and supralabials yellowish white, the latter clouded with brown; 
a dark streak from rostral through nostril and eye to upper part of 
last labial. Body grayish or yellowish brown above; anteriorly with 
large, irregular, dark brown, sometimes black-edged, blotches separated 
