NO. 1997. 



PHILIPPINE HEMI8CYLLIID SHARKS— SMITH. 



569 



fins closely covered with flat, imbricated denticles, those on upper 

 surface pointed elongate-ovate, with median and lateral keels, those 

 on abdomen and under surface of head smaller, smoother, and less 

 pointed; a long, slender dermal appendage, covered with small 

 denticles, on each side of throat at a point under posterior angle of 

 eye and separated from eye by a space equal to its diameter, the 

 length of the appendages 0.75 diameter of eye, distance of appendages 

 apart more than twice diameter of eye. 



Dorsal fins small and of nearly equal size; the anterior midway 

 between tip of snout and end of tail, its origin about midway between 

 origin of ventral and that of anal, its 

 base equal to 0.4 space between the 

 two dorsals; second dorsal beginning 

 over middle of base of anal; caudal 

 fin long, its length greater than head, 

 upper lobe very low and appearing 

 as a mere ridge anteriorly, lower 

 lobe also low, its height less than 

 0.5 base of first dorsal, a notch near 

 tip; anal fin low, its base equal to 

 distance from fin to lower caudal 

 lobe; ventrals rather broad, the 

 lateral angle rounded, the posterior 

 angle acutely pointed and reach- 

 ing to a point under origin of first 

 dorsal; pectorals short, broad, the 

 length equal to distance from ante- 

 rior angle of eye to their base, the 

 angles rounded, distance between 

 two fins at their posterior base equal to distance between spiracle 

 and anterior margin of fin. 



Color in life, cinnamon-brown above, mth blotches of darker brown 

 on head, body, and tail; whitish below; when diy, the entire surface 

 glistens as though varnished, owing to the peculiar character of the 

 dermal denticles. 



Type. — Cat. No. 74603, U.S.N.M., a female specimen 33.5 cm. long, 

 taken with a beam trawl on November 4, 1908, at station 5310 (lat. 

 21° 33' N.; long. 118° 13' E.), in the Chma Sea between northern 

 Luzon and China, at a depth of 100 fathoms. 



Fig. 2.— Front and side views of teeth of 

 clkrhosctllium near symphysis, greatly 

 enlarged. the dotted lines indicate the 

 margin of the gums. 0, upper jaw; 6,l0vneb 



JAW. 



