16 CARCINOLOGICAL STUDIES. 



soraewbat louger extent, ia contact with the infero-lateral 

 process of the front, and comparatively a little broader than 

 in Epix. subcorrosus. 



As to the external maxillipedes , I will observe that 

 the merus-joint is a little more transverse , and the exognath 

 also slightly broader in our new species than in Epiv. 

 frontalis. The abdomen is seven-jointed and strongly resem- 

 bles that of the other species , but the penultimate segment 

 is slightly more transverse in Epix. subcorrosus , in both 

 sexes, and the abdomen of the female is generally more 

 enlarged. 



The anterior legs are comparatively a little shorter and 

 a little less slender, but for the rest strongly resemble 

 those of Epix. frontalis as to their form ; they differ , 

 however, essentially by the upper surface of the 

 wrist and the upper margin of the palm being 

 distinctly rugose and uneven, whereas they are 

 smooth or nearly smooth in Epix. frontalis. 



The outer surface of the palm , which is strongly rugose 

 and granulated in Epix. corrosus , is perfectly smooth both 

 in Epix. frontalis and in Epix. subcorrosus,, at least in 

 the larger hand , the outer surface of the palm of the 

 smaller hand being somewhat minutely granular, when 

 seen under a lens, in both species. As to the form and 

 the dentition of the fingers , Epix. frontalis agrees with 

 Epix. subcorrosus, but the distal half only is black coloured, 

 whereas this colour extends slightly farther in Epix. frontalis. 



The ambulatory legs resemble those of Epix. frontalis , 

 but they are comparatively a little shorter and present 

 therefore a slightly less slender form. 



Epix. subcorrosus is closely allied to Ozius Agassizii 

 A. M. E. from Panama and to Ozius reticulatus Isis Des- 

 borne and Schramm , which inhabits the West-Indian Seas. 

 Our species differs from the former by the more regularly 

 oval form of the cephalothorax and by the hands being 

 subcorrose on the upper margin , but not covered with 

 small tubercles , whereas it may be distinguished from Ozius 



Notes from tlie Leyden ]Miiseuiii, "Vol. XIII. 



