CAPRELLID,*;. 3o8 



4. CAPRELLA. 



Capivlla, Lamarch, Si/st. des .Itiint. stois Vert. p. 105. 



Lfdch, Linn. Trans, ii. p. •i<i'-i. 



Edtcards, Hkt. des Crust, iii. p. 105. 



KriU/cr, Xaf. Tidskr. iv. p. 49(), 1842-43. 

 vEo-iiia, KriU/er, Nat. Tidahr. iv. 184:3. 

 PodiUirius, Kroyer, Nat. I'idskr. v. 1844. 



Body cylindrical. Cephalon and first segment of the pereion con- 

 fluent. Picon rudimentary. Gnathopoda subchelate. First two 

 pairs of perciopoda represented by the branchiae attached to their 

 respective segments only ; three posterior pairs of pereiopoda sub- 

 equal. First and second pairs of pleopoda rudimentary in the 

 male ; the rest obsolete. 



I have taken upon mj-self the responsibility of uniting Kroyer's 

 genera jEyina and Podalirius with Caprella. To this conclusion I 

 have not arrived hastily ; but after examining a great number of 

 Caprellidce, I found that the development of the obscure abnormal 

 pleon was very uncertain ; that the anterior pair of pleopoda were 

 constantly present in the males of every species, and are probably 

 the analogue as well as the homologue of the intromittent oi'gan in 

 the podophthalmatous Crustacea. 



1. Caprella linearis. (Plate LV. fig. 7.) B.M. 



Caprella linearis, Limi. ? 



Edicards, Hist, des Ontst. iii. p. 106. 



Ris.w, Crmt. de Nice, p. 130. 



Goodsir, Edinh. New Phil. Jmtrn. xxxiii. p. 100. 



(Not of Leach nor Desmarest.) 

 Caprella atomos, Pennant ? 

 Caprella punctata, Risso, Crust, de Nice, p. 130 ; Eur. Merid. p. 127. 



Body without tubercle or spine. First segment of the pereion short ; 

 foui- foUo's\'ing subequal, as long again as the first. Superior an- 

 tenna) nearlj half the length of the animal ; inferior reaching be- 

 yond the extremity of the peduncle of the superior. First pair of 

 gnathopoda haWng the propodos taperng ; palm extending the 

 entire length of the inferior margin, straight, fringed with cilia ; 

 dactylos minutely serrated upon the inner margin. Second pair 

 of gnathopoda larger than the first, having the propodos ovate, 

 tapering ; palm slightly uneven, convex, defined by a small tooth 

 crowned by a stout spine. Three posterior pairs of pereiopoda 

 having the propoda with the anterior margin excavate ; the part 

 against which the extremity of the closed dactylos impinges armed 

 with two stiff" corrugated spines. 



Ixjngth z^^ths of an inch. 



Hah. Probably all the coasts of Northern Europe, but much con- 

 fused with C. hbata. 



2a 



