282 



AMPniPODA NORMALIA, 



For a long time I considered this species to be the female of C. lonrji- 

 cornc ; but, until \\c have definite evidence us to their natural relation 

 to each other, it had better be described as a separate species, par- 

 ticularly as it appears to be more rare, and I have never received 

 them fi'om the same localities. 



3. Corophiuin Bonellii. 



Corophium BonolUi, Edwards, Ann. des Sc. Nat xx. p. 385 ; Hist, des 

 Crust, iii. p, 67. 



" This species is smaller than C. Jonr/iconie, and is distinguished from 

 it by the form of the third joint of the inferior antenna? [ante- 

 penultimate joint of the pedimcle], which presents no dental process 

 at its extremity, and by the existence of two large spines at the 

 inferior edge of the basal joint of the superior antennae. 



" Hah. ? "—M.-Edwards. 



4. Corophium contractum. 



Corophium contractimi, Stimpson, Proc. Acad. Kat. Sci. Fliilad. May 

 aud June, 1855. 



" Antennae equal in length, which is one-fourth that of the body ; 

 superior antennae with four-articulate flagella ; inferior antennae 

 very thick, with minute terminal articiili. Posterior pair of 

 pereiopoda rather long, with long plumose setae along the edges of 

 the basa. Colour yellowish. Eyes black. 



" Length i of an inch. 



" Hah. Japan." — Stimj)son. 



5. Corophium Acherusicum. 



Corophium Achei-usicum, Costa, Rend, della Reale Accad. delle Seienze 

 di Napoli, p. 178. 



''Male. — Superior antennae short and slender; inferior nearly as 

 long as the animal, the penultimate joint of the peduncle having 

 the inferior distal extremity armed with two or three curved 

 spines. 



" Female. — Antennae shorter and unarmed. Second pair of gnatho- 

 poda having the dactylos bidentate. 



" Length 2 lines. 



" Hah. Naples."~Coste. 



6. Corophium crassicome. (Plate XLYII, fig. 6.) 

 Corophium cii:a.&s\coTn.e,Bruzelu(s,Skand.Amph. Gamin, p. 15. pi. l.f. 2. 

 " Cej)halon fiumished with a more or less acute, small rostnim. Three 



