252 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. xxvi. 



a. Without spines between the large gastric pair. 



b. With a pair of spines near the middle of the gastric, region valida, p. 314 



h. Without middle gastric spines media, p. 262 



4. Second, third, and fourth segments of the abdomen armed. 

 a. Posterior margin of the carapace armed. « 



h. Spines of the posterior margin more than two. . 



('. With si)ines on the cardiac region. 



d. Cardiac spines one only evermanni, p. 307 



d. Cardiac spines more than one. 



e. Cardiac spines one pair jjerarrnata, p. 311 



c. Cardiac spines in two rows hispida, p. 259 



c. Without spines on the cardiac region bamffica, p. 306 



h. Spines on the posterior margin one or two. 

 c. Fourth segment of the abdomen with a pair of spines on the anterior 

 margin and a single spine on the median line near the posterior margin. 

 d. Spines on the middle of the gastric region one or more. 



e. Supraocular spines longer than eyes affinis, p. 305 



e. Supraocular spines shorter than eyes .flinti, p. 258 



d. Without spines in the middle of the gastric region. 

 e. With a row of spines on each side of the t'ardiac region . .normani, p. 311 

 ('. Without rows of spines on the branchial region near the cardiac 



region prolixa, p. 313 



c. Fourth segment of the abdomen without median spine. 



d. Supraocular spines longer than the rostral spine lougipcs, p. 310 



d. Supraocular spines not longer than the rostral spine stimj)soni, p. 313 



a. Posterior margin of the carapace unarmed. 



b. Chelipeds long and slender; merus cylindrical tenelln, p. 274 



b. Chelipeds short and stout; merus prismatic. 



c. Two or more spines on the outer margins of Itoth fingers of the cheli- 

 peds constricta, p. 307 



c. No spines on the outer margins of the fingers. 

 d. Merus of the maxillipeds unarmed. 



e. Eyes produced beyond the line of the sides gregaria, yovug, p. 308 



e. Eyes not produced beyond the line of the sides gregaria, p. 308 



d. Merus of the maxillipeds armed subrugosa, p. 314 



MUNIDA ANGULATA, new species. 



The carapace is broadest a little behind the middle. The gastric 

 region has eight spines, six of which are in a line behind the front. 

 These spines are subequal in size. A single spine is placed on the 

 side near the margin of the hepatic area; single spines on the anterior 

 branchial regions are the only other spines on the carapace, excepting 

 those of the lateral margins. The supraocular spines are about one- 

 half the length of the eyes. The rostrum is moderately long and 

 nearly horizontal. The peduncles of the eyes are stout and a little 

 longer than usual ; the cornea is less dilated. The front retreats from 

 the eye spines. The inferior margin of the merus of the maxillipeds 

 is armed Avith two sphies. The chelipeds are spiny and spinulose; the 

 fingers are cylindrical and in all specimens examined are in contact 



« Occasional specimens found with posterior margin (.)f carapace unarmed. 



