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 cm. 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. 



(Coutribution frotii the Zoological Laboratory of Pomona College) 



