:Vk\ TAi.i; sKor.snKnr. 



cases two l)risth's; al the liasc of the luaiuli with the |ii'^ tlicrc aic \\\i> iiiiirc luistlrs situalcil 

 cU«e togothor and dofsallw nunc |iri)\iniall\ . mi llir |ii'iiis there aic twn hristlcs close to each 

 other; all tht'so bristles are shoit ami siibe(|uai. 



F u re a (fifj. 7): - The iiuiiihcr of claws is on tiic average soincvviuil smaller than 

 in the female, eight to ten were observed; in most cases nine claws were observed on one lamcNa 

 and ten on the other; otiicr combinatiotis observed were: nine and nine, eight and nine. The 

 anterior claws are somewhat more bent than in the female. The C(jui|iiiient ol the claws is rather 

 considerably weaker than in the female; claw no. 2 is furnished with two rows of teeth, the inner 

 one of which is, however, in most cases rather sparse; on tlie tliri'e or four posteiior claws there 

 are no long bristles medially-basally. 



The name. Retnurks: — As is seen from the list of synonyms given above this species is known in 



the literature principally under two names, Ph. braiidu {\V. Baihd) and /'//. cjlobosun 

 (\\. L11.LJEBORG), the former of which has been used most frequently of late. 



\\liicli of these two names ought really to be used? 



The original description of Ph. brenda, or, as \V. Baihu called this species, Cyprklina 

 brenda, is to be found in W. Baird's work of 1850 a, p. 181, pi XXIII, figs. 1, a— g. It 

 is quite clear from this description that this form of Baihd's cannot be considered identical 

 with the one dealt with above by me. Whether it is identical with any other species now known 

 seems to be impossible to decide with certainty, but it does not seem improbable that it belongs 

 to the sub-genus Vargida. It is perhaps identical with C. (V.J megalops G. 0. Saus. As an 

 argument in favour of this statement of mine I may quote and discuss here a number of facts 

 from Baird's description. 



This author writes: ,,The shell or covering is oval, rounded at both extremities, rather 

 narrower at the anterior, where it is deeply notched in front, producing a kind of short 

 beak; .... the valves are smooth and tumid. — The eye is large and ovoid, with about 

 twenty areolae. — The first pair of antennae is divided into five articulations; the first being 

 the largest, and the others gradually becoming shorter as they descend, the last sending 

 off four long, plumose filaments. The second pair is curved, and formed of five joints: 

 the basilar being stout and rather short; the second, longer, arched on one side, and jjrovided 

 with three or four long, simple setae; the third is the shortest of all, with a projection on its 

 imder edge, which gives off two stout, plumose setae; the fourth, longer and narrower than the 

 preceding, is armed on its outer edge with five simple setae; and the fifth is very slender, and 

 terminated by four short, simple spines. — The natatory feet are large, and like those of preced- 

 ing species „(Ph. Mac Andrei)" , except that the long filaments are distinctly and beautifully 

 plumose, and that there was apparently no appendage attached to the basilar joint." 



The figure with which AA\ Baird illustrates his description of the shell agrees closely 

 with the description. It shows a shell of an egg-shaped type, with its greatest height somewhat 

 behind the middle and the posterior part of the shell clearly larger than the anterior part; the 

 dorsal and the ventral margins are boldly, imiformly and almost symmetrically curved; the 

 anterior and the posterior margins well rounded, the rostrum without a decided anterior corner. 



