1311. SOME NEW DEEP SEA CRUSTACEANS— BENEDICT. 261 



of .spinulps; at the side there are two spines obliquely plaeed; a num- 

 ber of spinules are scattered over the anterior portion and sides of 

 this area. There are about sixteen spinules on the trianjrular area- 

 a spine on the branchial area just behind the apex of the triang-le, 

 and another paired spine just ])ehind this. The posterior border of 

 the carapace has an armature of low spines about eighteen in number 

 in the figured specimen, and about ten in the smaller ones; the spines 

 of the lateral margin num])er from seven to ten. 



T^'he rostrum is more than twice as long as the supraocular spines; 

 it is slightly sigmoid and minutely serrate. The supraocular spines 

 area little longer than the eyes, are stout at the l)ase and taper rapidly 

 to a sharp point. The merus of the niaxillipeds is armed on its in- 

 ferior margin with two spines, which are widely sepai'ated. The 

 chelipeds are stout, prismatic, and spinose. The luerus of the amlm- 

 latory feet is triangular in cross section; both upper and lower anterior 

 margitis are thickly set with short curved spines. 



The second, third, and fourth segments of the abdomen are armed, 

 the second and third with two rows of spines and the fourth with a 

 single row; the second row of the double rows is composed of smaller 

 spines, and in all but the largest specimens these are usually wanting. 



Length of the type from the extremities of the rostrum and telson, 

 83mm.; length of right cheliped, 180 mm.; merus. 70 mm.; palm, 53 

 mm.; fingers, 30 mm. 



Locality. — Alhatross station 2817, Galapagos Islands; Alhatross sta- 

 tion 2987. Off Lower California seven specimens much smaller than 

 the type. 



%>.^— Cat. No. 20535, U.S.N.M. 



The variation between the large specimen taken for the type and 

 the smaller specimens is considerable. The carapace of the smaller 

 ones lack many of the spinules, and the spines are larger; the fourth 

 segment of the abdomen may show only two small protuberances in 

 place of the row of spines. The chelipeds are much shorter, and they 

 are armed with definite rows of spines; the palm is prismatic, and the 

 prehensile edges of the fingers are in contact throughout. The 

 rostrum in some of the smallest is slightly bent upward. With all 

 this variation, however, the specimens intergrade, and in my opinion 

 give no ground for separation. 



MUNIDA HONSHUENSIS, new species. 



The rostrum is slightly sigmoid, and is more than twice the length 

 of the supraocular spines, which do not quite reach the cornea. 



The spines of the gastric area are sixteen in number — twelve in the 

 gastric row, a pair separated by the first ciliated line, and a paired 

 spine at the base of the antero-lateral spine; there is a single^ paired 

 spine in the fork of the cervical suture and one ^ack of the fork. 



