CUMACEA. 1 f, L 



segments, the ischium being suppressed. Uropods having the peduncle shorter than 

 the rami. 



The genus Eocuma was established by Marcusex in 1894 for the reception of a 

 Japanese species, to which he gave the name E. hilgendorfi. The paper was 

 published after the death of the author, with some additional notes by Hilgendorf, 

 and was not accompanied by any figures. Recently the species has been re-described 

 and figured by Zimmer from two of Hilgexdorf's specimens, the actual type 

 specimens having been lost. In the original description the chiet characters given as 

 distinctive of the genus are the flattened form of the carapace and the meeting in the 

 middle line of the basal segments of the first pair of legs. The last-named character 

 does not hold good, as Zimmer has shown, for the sub-adult female, while on the 

 other hand I find it in immature specimens of several other genera. The flattening 

 of the carapace is much less marked in the adult male than in the female in the 

 species described below as E. taprobanica, and it is clearly impossible to base the 

 genus on this character alone. I propose therefore to modify the generic definition 

 so as to include all those species of Bodotriidse in which the carapace bears a pair of 

 curved lateral horns. In this way we obtain the following assemblage of species 

 which appears to be a natural one, the various forms agreeing also in the above- 

 mentioned characters of the first and second legs and of the uropods : 



Eocuma hilgendorfi, Marcusex, 1894. Type of the genus. 



E. ferox (Fischer) = Bodotria ferox, Fischer, 1872 = Cydaspis cornigera, 



G. 0. Saks, 1879 = Cyclaspoides ferox, Boxxier, 1896. 

 E. sarsii (Kossmaxx) = Cydaspis sarsii, Kossmaxx, re-described below. 

 E. taprobanica, n. sp. 

 E. affinis, n. sp. 



The genus Cyclaspoides of Boxxier (' Ann. Univ., Lyon,' 1896, " Campagne du 

 ' Caudan,' Edriophthalmes," p. 530) is distinguished from Cydaspis only by the fact 

 that the second legs are composed of six instead of seven segments. Of the two 

 species referred to it, C sarsii, Boxxier, and C. ferox (Fischer), neither is explicitly 

 named as the type of the genus. C. sarsii, however, differs in so many particulars 

 from C. ferox that it may conveniently be left in a different genus, for which the 

 name Cyclaspoides may be retained. 



The distinguishing characters of the species here referred to Eocuma may be 

 summarised as follows : 



A. Lateral margins of carapace carinated. 



1. Pseudorostrum reaching forwards beyond the level of the lateral cornua. 

 Carapace much depressed, surface smooth. 



a. Antero-lateral tooth on either side of pseudorostrum incon- 

 spicuous (?) or absent ( 6 ). No paired ridges on dorsal surface 

 of carapace. E. taprobanica. 



Y 



