CRUSTACEA. 657 



Leptomera LATH. (Proto LEACH). Seven pairs of feet, arranged 

 in a continuous series. Fifth pair of feet shorter, furnished with a 

 small claw, slightly moveable. Three pairs of branchial vesicles at 

 the bases of the second, third and fourth pairs of feet. Abdomen 

 small, uniarticulate, with four appendages, elongate, biarticulate. 



Sp. Leptomera pedata, Gammarus pedatus ABILDGAARD, MUELLER Zool. 

 danic. Tab. 101, figs, i, 2, GUERIN Iconogr., Crust. PL 28, fig. 3. According 

 to KROEYER Leptomera ventricosa DESMAREST, Squilla ventricosa MUELL. 

 Zool. dan. is the female of this species. To it belongs also Phthisica 

 marina SLABBER Natuurk. Verlust. PI. x. figs, i, 2. 



The genus Proto of DESMAREST (Crust, p. 276) rests on imperfect observa- 

 tions, and appears not to differ from Naupredia LATR. 



Section II. Genuine Amphipoda. Head distinct from the first 

 segment sustaining a pair of feet. Segments of trunk mostly fur- 

 nished with a distinct lateral part (epimeron). Mandibles supplied 

 with palp. Tail made up of several segments, furnished with bifid 

 feet. Body mostly compressed, arcuate. 



Comp. MILNE EDWARDS Ann. des Sc. nat. xx. 1830, pp. 353 399, and 

 H. KROEYER Greenland's Amfipoder. Kjobenhavn, 1838. 4to. (printed sepa- 

 rately from vn. Th. der Kongel. DansTce Videnskabernes Selskabs naiurvid. 

 leni. Afhandlinger, p. 229, &c.) 



Family XXII. Hyperina or Uroptera. Foot-jaws small, not 

 covering the eibarious organs. Head large. Last abdominal feet 

 at the apex of tail mostly resembling a flabelliform fin, foliaceous. 



Oxycephalus EDW. 

 Pronoe GuERIN. 

 Typhis Eisso, EDW. 



Sp. Typliisferus EDW. Ann. des Sc. nat. 1. 1. PI. n, fig. 8, GUERIN Iconogr., 

 Crust. PI. 27, fig. 8; in the Atlantic near the Canary Islands. This genus 

 and the preceding are remarkable for their long inferior antennae, which 

 are bent at three acute angles. 



Phronima LATR. Antennse two short. Fifth pair of feet elon- 

 gate, terminated by a hand broad, didactylous. Tail elongate, 

 with five distinct segments, the sixth segment coalesced with fifth. 



Sp. Phronima sedentaria LATR., Cancer sedentarius FORSK., HERBST Krdbben 

 und Krebse, n. p. 136, Tab. 36, fig. 8, LATR. Gener. Crust, et Ins. Tab. n. 

 figs- i> 3 j t^ animal is found in the Mediterranean, where it lives in a 

 kind of gelatinous keg, open at both ends, probably from a dead Beroe. 



VOL. i. 42 



