:;ss 



A. E. Verrill Decapod Crustacea of Bennm/n. 



Of the lateral teeth, the first eight are subequal, all acute and 

 curved forward; the third is a trirle wider; posterior lateral tooth 

 not very large, about twice as long as the preceding, acute, curved 

 a little forward. Merus of ehelipeds with four strong anterior spines 

 directed forward, and sometimes a small or subol.^.lrie distal pos- 

 terior one, which may le wholly lacking ; t \\ < carpal spines rather 

 short. Manns with a strong dorsal carina, ending in a sharp diver- 

 gent tooth at about the distal fourth. Merus <>!' swimming feet 

 broader distally, its posterior distal angle armed with a very small 

 sharp spine and several more minute, acute denticles. 



; 



Figure 33. Achelous Smifliii : n, first ambulatory Irg : l>, swimming leg; 

 d, denticulated angle of merus, enlarged. Phot. A. II. V. 



This form is very closely allied to -I. ./</// ///m//"N, from which 

 it is best distinguished by the less prominent front : the smaller and 

 nearly equally prominent frontal teeth; the shorter and weaker pos- 

 terior lateral spines ; and by the small or nearly obsolete posterior 

 distal spine of the merus of the ehelipeds. The ehelipeds are also 

 longer. Some of our specimens (No. 4035) were catalogued as .1. 

 spiniriKunis by Prof. S. I. Smith, who depended on the figure of 

 A. M. -Edwards. The type specimens, here described and figured, 

 are from that lot. 



Measurements of Types and Cotypes. 



ipeds 

 height 



s Locality 



Off Hatteras 

 Off Hatteras 

 Ft. Macon 



The ratio of length to breadth, not including large lateral spines, 

 is 1: 1.40 to 1: 1.45. 



