16 A. E. Verrill — Additions to the Fauna of the Bermudas. 



CRUSTACEA. 

 DECAPODA. 



Epialtus bituberculatus M. Edw. (?) var. Bermudensis Ver. 



Plate I. Figure 1. 

 This foi-m diflPers so decicledlj^ from the several .so called varieties 

 of E. hituherculatiis figured by A. Milne-Edwards (Crust. Reg. 

 Mex., p. l-ST, pi. xxvii) that it seems necessary to give it, at the 

 least, a varietal name. Indeed, the differences are so great as to 

 indicate a distinct species, but, unfortunately, we obtained only a 

 single example. It resembles the E. Braziliensis Dana, considered 

 a variety by A. M. Edw., more than var. affinis Stimp. From both 

 it differs in having a much longer and differently shaped rostrum ; 

 in the more transverse front edge of the carapax and the much 

 deeper emargination on the sides ; the more prominent lateral tuber- 

 cles ; the much longer legs and chelipeds ; and es^^ecially in the 

 much longer and differently shaped chelse. 



The length of the rostrum to that of the rest of the carapax is as 

 1:1.62; the length of the carapax (without rostrum) to its breadth 

 is as 1:1.30 ; the length of the chelss is equal to that of the carapax 

 to base of rostrum ; the length of the chelas to the breadth is as 3:1, 

 their distal portion being decidedly the larger. Total length of 

 carapax and rostrum, 15.7™'"; greatest breadth, 12.3'"'"; length of 

 rostrum, 12'"'" ; of chelpe, 10.3'""". 



The sides of the carapax are deeply concave in outline between 

 the two tubercles ; the anterior tubercles are much the larger, but 

 the posterior are a little more prominent and more acutely angular, 

 their anterior edge being incurved. The rostrum is rather long with 

 the outlines in front of the eyes distinctly incurved, but the tip is 

 obtusely rounded ; there is a pair of distinct angular denticles in 

 front of the eyes, back of Avhich the outlines are nearly parallel. 

 The front margins of the carapax are nearly transverse, sloping but 

 little from the orbits to the antero-lateral tubercles, which are 

 bluntly rounded. 



The color in life was brownish purple, becoming greenish ante- 

 riorly and grayish on the legs ; on the posterior part of the carapax 

 there is a large, broad T-shaped spot of cream-color. Chelipeds yel- 

 lowish brown, the claws whitish. 



Flatts Inlet, cut out of a deep hole in a ledge, one specimen only, 

 April, 1901 (A. H. v.). 



The E. Mtubercalatm is recorded from Chili, Panama, Florida 

 (var. affinis), Brazil, etc. 



