34 G- 0. Sårs. 



on the outermost ribs; surface of shell between the ribs 

 smooth, or very finely punctate. Rostrum in female termina- 

 ting in a' somewhat procurved blunt point; that in male 

 considerably larger, and obtusely rounded at the tip; cervical 

 sulcus in both sexes very deep and narrow. 23 pairs of 

 branchial legs present in both sexes, epipodite in some of 

 the pairs unusually prolonged; the 2 anterior pairs in male 

 transformed in the usual manner, and having the hand 

 smooth inside. Tail-piece with the unguiform processes of 

 the caudal plates in female of the usual appearance, in male 

 very asymmetrical, the right process being much curved, 

 and projected at rather a long distance above the left; 

 caudal claws setiferous at the base, outer part finely den- 

 ticulate inside. Colour of shell corneous, of enclosed animal 

 dark red. Length of shell in female 7 mm ; in male 8 mm. 

 Remarks. —The present species would seem to be 

 nearly allied to E. cycladoides, Joly, with which I was at 

 first inclined to identify it. After having consulted the 

 original description of the species by Joly, and that sub- 

 sequently given by Dr. E. Simon, I find, however, that it 

 differs in several points, both as to the shell and the enclosed 

 animal, and is thus entitled to be regarded as a distinct 

 species. It is also rather like the Australian species JE. 

 Paclardi, Brady, described in detail by the present author 

 in another paper inserted in this Journal; but in this instance 

 too, there are some well-marked differences to be found, 

 which do not permit the combination of the 2 forms into 

 one and the same species. Thus, the concentric ribs of the 

 valves in the present species are much more prominent, 

 and the interspaces between them are quite smooth, not as 

 in the Australian species, striolate Moreover the rostrum 

 of the female is of somewhat different form, and the number 



