56 



Dermatemys Maivii, n. s. — Vertebral platės: Ist broad, seven- 

 sided ; 2nd, 3rd and 4th longer than broad. Colour pale brown ; the 

 upper surface covered with small, close, irregular depressions of a 

 darker brown colour ; the shields pale, nearly transi^arent, very brittle 

 ■vvhen dry ; the under surface uniform pale yellowish A^hite, with 

 slightly sunken grooves. 



Length of upper shell 1 7 inches ; width 1 1 inches ; length of ster- 

 num 12|- inches. 



Remarks. — The specimen appears to be not quite full-gro\vn. It 

 has much of the external appearance of Phrynops Geoffroyii, and the 

 general thinness of the scales of Chelydidce ; but there is no appear- 

 ance of any scar on the inner surface of the sternum for the attach- 

 jnent of the pelvis ; and though the gular scale is worn and nearly 

 obliterated, yet it is sufficiently distinct to show that it has no inter- 

 gular plate. 



3. Descriptions of new Crtjstacea from the Eastern Seas. 

 By Adam White, F.L.S. 



Fanuly Inachid^. 



Genus Doclea, Leach. 



DocLEA CALCITRAPA, White, U. S., List of Specimens of Crust. in 

 Brit. Mus. p. 4. 



Carapace ■vvith seventeen large spines on the back and sides, and 

 sixteen smaller tubercles on the upper surface ; seven of the large 

 spines down the middle of carapace, six of them erect, the sixth 

 springing from the base of the much-elongated horizontai terminai 

 spine ; the lašt of the spines of the side much longer than the other 

 three. The •vvhole surface seems to have been covered with hairs. 

 The four hind pairs of legs are very long and slender. 



Breadth of carajjace 1 inch 4 lines ; length 1 inch 10 lines. 



A species distinguishable at first sight from the four species hitherto 

 described, of all of which there are specimens in the Museum Col- 

 lection. 



Hab. Philippine Islands (Zebu) : Brit. Museum. From Mr. Cu- 

 ming's coUection. 



Family Maiad>e. 

 Hyastenus, White. 



Carapace rather oblong, rounded on the sides behind, before and 

 behind the eyes straight ; a slight transverse groove in upper orbit ; 

 front \vith two horns as long as the carapace, at first parallel and then 

 diverging and directed slightly downvFards ; outer antennse with all 

 the joints cylindrical ; the insertion of the basai joint concealed by 

 the frontai horn. 



Fore-legs slender ; second pair of legs the longest and very slender ; 

 terminai joint vvith the edge spined. 



A genus allied to Hyas and Chorinus, the only species of which 

 was long ago figured in the large work of Seba. 



