CAPRELLID^. 359 



13. Caprella acuniLoifera. (Plate LVI. fig. 11.) B.M. 



Cnprdln nciiiniiiil'era, Lcac/i. 



Lutr. in Di'smarest, Consid. sttr les Cntsi. p. 277. 



JSdicards, JlisL dcs Crust, iii. p. 107. pi. 83. f. 21. 

 Caprellu llystrix, Kioyer, Voij, en Scund. pi. 24. f. 1. 



Tuberculated along the dorsal surface, increasing in degree posteriorly. 

 First segment of the pereion short. Superior antennae scarcely 

 half the length of the animal : inferior not longer than the peduncle 

 of the superior. Second pair of gnathopoda articulating anteriorly 

 to the centre of the second segment of the jiereion; propodos ovate ; 

 palm convex, defined by a process sui'mounted by a spine with an 

 emargination immediately in front, and armed with two rudi- 

 mentary teeth anterior to the centre of the palm. Three posterior 

 pairs of pereiopoda robust, subequal ; propoda having the anterior 

 margin excavate. 



Length \ of an inch. 



Hah. Devon (C. S. B.) ; Northumberland (Eev. A. M. Norman) ; 

 Millport, N. B. {Mr. Eobertson). 



14. Caprella calva, n. s. (Plate LVII. fig. 1.) B.M. 



Male. — Cephalon posteriorly and dorsaUj lobed. First segment of 

 the pereion very short ; second, third and fourth long, and each 

 surmounted by three large dorsal tubercles or teeth, the two 

 anterior being sublateral and parallel, the third posterior and 

 central; fifth, sixth and seventh segments shorter, and sur- 

 mounted by only two sublateral parallel tubercles. Superior 

 antennae not half the length of the animal : inferior not longer 

 than the peduncle of the superior. Second pair of gnathopoda 

 articulating posteriorly to the middle of the second segment ; 

 propodos extremely arcuate on the anterior margin ; palm deeply 

 excavate, defined by a strong tooth, and armed anteriorly to the 

 excavation by a short tooth ; dactylos arcuate, interior margin 

 armed with two obtuse teeth. Three posterior pairs of pereiopoda 

 subequal ; propoda not anteriorly excavate, but armed with a few 

 spines. 



Female. — Tubercles on the dorsal surface not so conspicuous. Second 

 pair of gnathopoda with the propodos ovate ; palm convex, defined 

 by a small process armed with two spines. 



Length : male ^ths, female ^ths of an inch. 



Hab. Banff (ITr. Edward); Northumberland (Rev. A. M. Norman); 

 MiUport, N. B. {Mr. Robertson) ; Plymouth {Mr. Barlee Sf C. S. B.). 



Varieties of this species occur, in which the propodos of the second 

 pair of gnathopoda differs in form between that of the female and 



