82 Journal of Entomology and Zoology 
little. The lower jaw has two short, sharp teeth In front when the 
mouth is closed. When it is open there is a large tooth, .8 cm. 
long. The lower jaw hsa, next, ten teeth 1 cm. long, then three 
large ones 3 cni. long, then ten trinagular teeth 1 cm. long. The 
upper jaw has an outer row which may be seen when the mouth is 
closed. These are 1 cm. or less in length and 75 on a side. The 
roof of the mouth has three projecting teeth like the large ones 
below, knife-shaped, flattened from side to side, 3 cm. long. Back 
farther, on each side, is a similar tooth 1 cm. long, then on each 
side a similar tooth 1 cm. long, then on each side back six trian- 
gular teeth 3 mm. long. 
The three large central teeth should really be counted four, be- 
cause there is another of the same sort not yet fully broken through 
the membrane of the mouth. 
Greatest depth of the head is 8 cm. The body was much 
shrunken after preservation, but the proportionate depth at various 
regions is well shown in the photograph which was taken by our 
photographer, E. M. Robbins. 
W. A. Hilton. 
(Contributinn from tlw Zoologic<il Laboratory of Pomona College) 
