658 CLASS X. 
Primno GUERIN. 
Themisto GUERIN. 
See Guérin Mém. de la Soc. d’ Hist, nat. de Paris, tv. pp. 379—386, 
Pl. 23; Kronyer Grenl. Amfip. pp. 63—68, Tab. Iv. figs. 16, 17. 
Phrosina Risso, Dactylocera LATR. 
Anchylomera Epw. 
Hieraconyx GUERIN. 
Hyperia Laver. Antenne four. Feet slender, terminated by 
an incurved hook. ‘Trunk broad, gibbous above; tail attenuated. 
Lestrigonus Epw., Tyro Epw., Phorcus Epw., Hyperia Epw., 
Metoécus KROEYER. 
Sp. Hyperia Latreillii Epw., Ann. des Sc, nat. xx. Pl. 11, figs. 1—y7, 
GuérRin Iconogr., Crust. Pl. 25, fig. 5; Hiella Orbignit StRAUS-DURCK- 
HEIM, Mém. dw Mus. xvii. 1829, Pl. 4. 
Note.-—Genus Daira Evw., is distinguished by having only two 
short antenne, and by the second pair of feet being didactylous. 
Metoécus Kroryer, furnished with four short subulate antenne, 
differs from the other Hyperie by the first and second pairs of feet 
being shorter and terminated by a didactylous chela. Gren. 
Amfip. pp. 60—63, Tab. tv. fig. 15. 
Family XXIII. Gammarina. Foot-jaws large, conjoined at 
the base, forming an accessory inferior labium, covering the ciba- 
rious organs; cloven anteriorly into two lamin, and on the outside 
sustaining an articulate palp. Last caudal feet terminated by 
appendages styliform, more rarely foliaceous, not resembling a fin. 
Head congruous. 
Comp. H. Krorrer Wye nordiske Slegter og Arter, henhirende til Fami- 
lien Gammarina, Tidsskrift. 1V. 1842, pp. 141—166. 
A. Lateral parts of segments of trunk (epimera) moderate, not 
covering the bases of feet. Abdominal feet six; the last terminated 
by two small oval lamine. 
Vibilia Epw. 
Corophium Larr. Two inferior antenne large, thick, pediform. 
Sp. Corophium longicorne, Cancer grossipes L., Oniscus volutator PAUut., 
Miscell. Zool. Tab. 1v. fig. 20, Spic. Zool. 1x. Tab. 4, fig. 9, GRONOV. 
Zoophylac. Tab. xvit. fig. 7, Guerin Iconogr., Crust. Pl. 27, fig. 1. 
