222 



AMrHIPODA NORMAMA. 



35. Gainmarus flabellifer. 



Gammanis flabellifer, Stinipnon, Proc. Acad. Nat. Sci. Philad. May and 

 June 1855. 



" Slender, smooth posteriorly. Eyes small, roimd, black. Superior 

 antennnc half as long as the body ; flagellum twenty-articulate ; 

 secondary appendage five-articulate. Gnathopoda having the 

 propoda oblong-elliptic, with a fusiform area below surrounded by 

 short setae. Rami of posterior pair of pleopoda long, lamelliform, 

 elliptical, equal, spreading like a fan. 



" Length ^ an inch. 



" Hah. Loo Choo." — Sthnpson. 



36. Gammarus bispinosns. 



Gammanis bispinosus, Costa, Rend, delta Reale Accad. delle Scienze di 

 Napoll, 1853, p. 176. 



" Having the dorsal sui-face round. Fii'st two segments of the pleon 

 posteriorly produced into a depressed spine (tooth?)*. Superior 

 antennae extending a little beyond the peduncle of the inferior ; 

 inferior antennae reaching a little beyond the last joint of the 

 peduncle. Gnathopoda robust, equal, having the propoda oblong- 

 ovate, palm very oblique, deHcately ciliated. Posterior pair of 

 pleopoda longer than the preceding. 



" Length 2| lines. 



" Hah. Naples."— Costo. 



37. Gammarus ungxiiserratus. 



Gammarus unguiserratus, Costa, Rend, delta Reale Accad. delle Scienze 

 di Napoti, 1853, p. 176. 



" Having the dorsal surface smooth, unaimed. Last two segments 

 of the pleon with two small filiform erect spinules. Antennae 

 slender, the superior being one-fourth shorter than the body; 

 flagellum half as long again as the peduncle : inferior reaching a 

 little beyond the peduncle of the superior. First pair of gnatho- 

 poda small, slender : second \>n\v enlarged below, having the palm 

 of the propodos very oblique ; dactylos denticulate towards the 

 base. 



'• Length 3 lines. 



" Hah. Naples."— Cos^a. 



* Throughout this Catalogue, the term "tooth" has been appliecl to a sharp 

 ■point which is a process of the part to which it belongs, wliile tliat of " spine" 

 has been given to one which articulates at tlie base, as suggested and used by 

 Professor Kiuahan. 



