15G BULLETIN OF THE 



sion indicating the outer extremity of the cervical sulcus, which is entirely 

 obsolete in its median portion. The margin of the carapax is distinct ami 



somewhat acute on the hepatic region, and on the anterior part of the 

 branchial, as far as a slight angular projection, posterior to which it 

 ceases to be denned. Surface of the carapax minutel) granulated. Chel- 

 ipeils in the female two and a hah' times as long as the carapax, excluding 

 the spine, ami minutely granulated ; meros more sharply granulated than 

 carpus ami hand; fingers very slender, much longer than the palm, ami 

 armed within with needle-like teeth. Ambulatory feet very slender ami 

 smooth, those of the first pair reaching to the middle of the palm of the 

 chelipeds ; meros-joint as long as the terminal three joints taken together. 



The above description is that, of a female. In the male the carapax is 

 less smoothly rounded above, the regions being faintly indicated, and the 

 intestinal region protuberant above the base of the posterior spine. 



Dimensions of a sterile female: Length of carapax, including the poste- 

 rior spine, 0.63 ; breadth, 0.52; length ofcheliped, 1.38 inch. 



Off Carysfort Iteef, March 21, 18(59. Cast No. 7. 40 fathoms. 

 Off French licet', March 21, 18(59. Cast No. 2. 45 

 Oil' Pacific beef, May 13, 1869. Cast No. :i. do 



Iliacantha sparsa nov ^]>. 



Carapax oval; intestinal and hepatic regions only defined; surface 

 sparsely granulated; granules scattered, sharply projecting, almost like short 

 capitate spines; surface between the granules punctate, or, as near the 

 margins, covered with smaller granules. Postero-lateral margin less con- 

 vex than in /. subglobosa. Posterior spines large; lateral ones similar in 

 shape to and more than one half as large as the middle .-pine. A spine on 

 the hepatic region half as large as the lateral posterior ones. Depression 

 between the frontal and gastric region very deep, giving great prominence 

 to the facial projection; median sinus of front very deep: frontal tee.h 

 much projecting. External maxillipeds larger, more produced in front, 

 ami more coarsely granulated than in the preceding specie-: granules 

 prominent, like those of the back of the carapax. 



Dimensions of a sterile female: Length of carapax, posterior spine 

 included, 0.30 ; breadth, 0.25 inch. 



It is easily distinguished from /. subr/lobosa by it- hepatic spine. 



\V. i ,,f the Tortu»as, January !»'>, 1869. Cast No. 1. 30 fathoms. 



Myropsis nov. gen. 

 This rronus differs from Mijra, to which it is nearly allied, in its more 

 globular form, in having five instead of three posterior spines, in the want 

 of the median and hepatic ridges, and in having the outer margin of the 



