482 CBABS OF THE FAMILY LITHODID^— BENEDICT. 



a little farther forward. The scale is rudimentary; the spine at the 

 outer angle is branched at the base, the branch consisting of a single 

 short, sharp spine on the outer surface. The abdomen is without spines ; 

 the spines of L. maia are replaced by tubercles; tliose of the first seg- 

 ment are very much closer together than the corresponding spines in 

 L.maia. The tubercles on the lower margin of the second segment are 

 low and somewhat oblong at base; those in the center of the segment 

 are larger. 



The chelipeds are slender and weak. The armature of tlie fingers of 

 the right hand is slight; the fingers gape. The fingers of tlie left hand 

 are long and slender and gape at base. The spines of the chelipeds 

 and ambulatory legs are numerous and arranged about as in L. maia, 

 but are shorter. 



Locality and type. — At station 331311, in 399 fathoms, north of Unalaska, 

 a single male (No. 18531, U.S.N.M.) was taken; also at station 3338, 

 off Shumagin Bank, in 625 fathoms, three young specimens (No. 18532, 

 U.S.N.M.) which I refer to this species without hesitation. The ros- 

 trum differs in being bifurcate as in L. mala. It is possible that addi- 

 tional specimens of the adult form might show the rostrum to be bifur- 

 cate rather than bifid. 



LITHODES RATHBUNI, new species. 



Carapace of male armed with long spines on the different regions; 

 also with longer spines on the margins. There are four on the gastric; 

 two short and two long on the cardiac region. The branchial region 

 has six spines of various lengths. The j)()stero-lateral margin has the 

 longest spine, it being 26 mm. in length on one side and 23 mm. on the 

 other. Both have lost their points. Anterior to this there are three 

 spines, the shortest unbroken one being 17 mm. long; on the margin 

 posterior to the longest spine there are four spines, the longest of which 

 is 14 mm. in length and the shortest eight mm. The rostrum is composed 

 of five br^inches; the niain stem is sharply bent upward and is strongly 

 bifurcate; the lower horn is almost on the horizontal line of the body, 

 and projects forward more like the usual main portion of the rostrum; 

 the lateral branches arise at the base and project forward. The mov- 

 able spine of the antenna is very long and slender; there is a short 

 branch or spine on its outer and upper margin near the base. 



The right chelii^ed is slender, and rather weak. Its longest spine is 

 situated on the distal upper margin of the merus. There are ujiwards 

 of twelve snines on the carpus. On the median outer surface of the 

 palm there are two rows-of four spines each. The fingers gape at the 

 base ; their prehensile edges are tubercular. The left cheliped is smaller 

 and more slender than the right. The cutting edges of the fingers run 

 back to tiie gape, or a little more than one-half their length. The 

 ambulatory legs are slender and very spiny; the spines are from three 

 jiO five mm. in length. 



