REPORT ON THE AMPHIPODA. 189 



uu petit Crustaoo qui a (jte deorit dernierement par M. Templeton, et qui ressemblc beaucoup 

 aux C^rapodes, tant par son organisation que par ses moeurs, mais qui s'en distingue par la 

 conformation des anteunes, dont les deux paires se terminent par un filet luulti-articulo. II 

 est aussi k noter que la tete est ici confondue avec le premier anneau du thorax, et que les 

 quatrifeme, cinquifeme et sixifeme anneaux paraissent etre d^pourvus de pates." The single 

 species is Cerapodina aMita, the Verapus ahditus of Templeton, which must retain its name, 

 the new genus being only founded on obvious errors in Templeton's description. 



The next genus given is Podocerus, Leach, with the species, 1. variegatus, Leach; 2. imlchellus, 

 Leach ; followed by an observation on the Podocerus cylindrieus of Say. The genus 

 Corophium, Latreille, receives the species, 1. longicorne, with the usual synonymy ; 

 2. " BonnelUi," M.-Edw. Atyliis, Leach, has the one species carinalus, for the Gammarus 

 carinatus of Fabricius. Unciola, Say, has the single species, irrorata. Say. 



The Famille des Hypcrines is divided into three tribes. The first, the Tribu des Hyperines 

 gammaroides " characterised by the smallness of the head and the compressed form of the 

 body," includes a single genus, Vihdia, M.-Edw., with Dactyloche, Latreille, for a synonym, 

 and with one species, Peronii, M.-Edw., PI. 30, fig. 1. 



In the second division, the Tribu des Hyperines ordinaires, "le corps est large et renfle; la tete est 

 tr^s-grosse ; les antennes de la premitsre paire sont subulees et pointues ; enfin celles de la 

 seoonde paire sont styliformes et ne peuvent pas se reployer sur elles-memes comme chez 

 les Typhis, etc." The genera and species included are as follows: — Hyperia, Latreille, 

 identified with Cancer 1 Montagu, Lanceola, Say, Hiella, Straus, and containing the 

 species, 1. "LatreilUi," JL-Edw., pi. 30, fig. 16; 2. oMivia, Kroyer; 3. Gaiidichaudii, n. s., 

 from Chili, redescribed in the Erit, Mus. Catal., p. 289, and figured as "Lestrigonus 

 Gaudichaudii," with the remark that " it closely resembles L. exidans, but may be at once 

 recognized by the distinct armature on the propoda of the gnathopoda." After the 

 numbered species of Hi/peria, Milne-Edwards observes thai " Hi/peria Lesueurii," Latr., 

 seems to differ from the two preceding species by having two little triangular horizontal 

 plates, instead of the single plate at the distal end of the abdomen ; that Say's Lanceola 

 pelagica agrees essentially with Hypieria, but is distinguished from the other species by 

 having the sixth pair of legs much longer than the rest; and lastly, that Gammarus galba of 

 Montagu probably belongs to this genus. Metoeeus, Kroyer, has the one species, "Medn- 

 sarum," 0. Fabr., followed by the remarks on Talifrus eyanex, Sabine, already quoted in note 

 on Sabine, 1821. Phorcus, M.-Edw., has its one species, formerly spelled Reynaudii, but here 

 Eaynaudii, M.-Edw. 



Tyro is a new genus instituted to receive Hyperia carnigera, M.-Edw., and is thus 

 explained: — "Dans cette petite division gen^rique, la forme generale du corps est la 

 meme que chez les Hyperies si ce n'est que la tete est tronquee anterieurement. Les 

 antennes inferieures sont extrSmement petites comme dans les genres pr^c&lens, mais celles 

 de la premifere paire sont plus longues que le corps, et composers de deux articles dont un 

 basilaire tres-court, et I'autre terminal styliforme, gros et excessivement long. Aucune des 

 pates n'est prehensile, mais leur longueur est tris-inegale ; celles de la cinquieme paire sont 

 beaucoup plus longues que les autres, et quoique assez fortes, ont leurs deux derniers articles 

 filiformes ; les pates de la septieme paire sont trfcs-petites et si greles qu'eUes ne paraissent 

 pas etre propres h, la locomotion. Quant k I'abdomen, sa conformation est semblable a celle 

 des Hyperies, si ce n'est que les fausses pates des trois derniferes paires sont tres-greles, et ne 

 presentent pas k leur extremit6 deux lames distinctes." It has been pointed out by 

 Bovallius, 1886, that this genus anticipates Clydonia, Dana. 



Primno, Guerin, is given with the species macropa, Gu(5rin. Lestrigonus, M.-Edw., has the 

 species "Fahreii," M.-Edw., figured pi. 30. fig. 18., the description being followed by the 

 remark that Lestrigonus exulans of Kroyer seems to be intermediate between the preceding 



