REPORT ON THE AMPIHPODA. 143 



tennin^es toutes par nne longue tige subulee, multi-articulee. Aucune patte n'est prehensile 

 mais celles de la seconde paire pr6sentent una espece de petite main formc'e par I'ante- 

 p^nultifeme article, etc., etc." The type species is Legfru/orms Fahrei, n. s., described and 

 figured afterwards in the Hist. nat. des Crustac6s. By many authors the genus Lestrigonus 

 is considered to represent only the male forms of ILjperia, Latr. 



5. Daira, n. g., thus described : — " Tete grosse et renfl6e ; antennes styliformes et rudimentaires ; 

 thorax conique, trfes-^troit post6rieurement et ayant lo premier segment trfes-court; pattes 

 des deux premieres paires portant une main imparfaitement didactyle, dent le doigt mobile 

 est forme par les deux derniers articles ; abdomen comme dans le genre Hyp6rie." Type 

 species "Daira Gabertii," n. s., described subsequently in the Hist. nat. des Crustaces. The 

 name Daira being pre-oecupied is changed by Dana into Dairilia, which owing to a misprint 

 in his work is sometimes written Dairinia, but Lovallius, 1886, maintains that Dana's 

 Dairilia is a distinct genus, and that Para]^hronima, Glaus, is the genus which comes 

 nearest to Milne-Edwards' Daira, or is possibly identical with it. 



G. Tlieinido, Guerin. 



7. Dadylocera, Latr., which Latreille, as already mentioned, supposed to be the same as Vihilia, 



Milne-Edwurds, but which Milne-Edwards, probably against his better judgment and 

 merely out of respect to Latreille, introduces herewith the synonym "Phrosina? Risso.'' 

 He assigns to it only the species " Dadijlocera Niaeensis," n. s., with the synonym 

 "Phrosina semUunata? Risso." In 1840 he called the species "Phrosina Nicetensis," 

 and distiuguished it, though perhaps needlessly, from. Phrosina semilunata, Risso, on the 

 authority of Costa's figures of the latter species in the Fauna del regno di Napoli, pi. 4, 

 figs. 1-5. 



8. Anchylomera, n. g., thus described : — " Forme g^n^rale du corps la mOme que dans le genre 



precedent ; antennes tres-courtes et styliformes ou nuUes ; thorax divise en six segmens ; 

 pattes des deux premieres paires termin^es par un article aplati et lanc^ole ; celles de la 

 troisifeme et de la quatrifeme paires termin^es par une petite main formee par le troisifeme 

 article ; pattes de la cinquieme paire grosses et subohelifferes ; enfin celles des deux derniferes 

 paires torminees par une tige grele et cylindrique." Two new species, Anchylomera Blosse- 

 villii and Anchylomera Hunterii, are assigned to this genus. 



9. Phronima, Latr. 



10. Tyi^his, Risso, to which he assigns Typhis fm-us, n. s., pi. 11, fig. 8-18, and Typhis rapax, 

 n. s. Of Typhis ferus Glaus says that it is clear Milne-Edwards only knew the male of a 

 species probably belonging to the genus Hemityphis, Glaus. Typhis rapax, Glaus considers 

 to belong to a diiferent genus, perhaps that which he calls Schizoscelus in his family 

 Sceliclx. As "espfeces douteuses" Milne-Edwards places under this genus. Typhis oroides, 

 Risso; Gammarus wtowocwZowfe ? Montagu ; Cancer ampulla? Phipps; and Gammarus 

 gihhosus 21 Fabricius. 



11. Onjcephalus, n. g., thus described: — " Ges Amphipodes s'eloignent de la plupart des 

 Hyp6rines par la forme grele et allongee de leur corps, par leur tete aplatie et lanceolee, etc. 

 Les antennes sont semblables k celles des Typhis ; les pattes des deux premiferes paires sont 

 termin^es par une main didactyle bien form6e ; les autres sont greles, cylindriques et non 

 prehensiles ; celles de la septifeme paire sont trfes-courtes. La disposition de I'abdomen et 

 de ses appendices est assez semblable k ce qui existe chez les Hyperies," with the type 

 species Oxycephalus piscatoris, n. s., a name afterwards changed to Oxycephalus piscalor. 



Among genera incedx sedis he mentions Hiella, Straus, as no doubt belonging to Hypcria, 

 Lepidaciylis, Say, as seeming to come among the Hyperina, Pterygocera, Latreille, SpercMus 

 and Leplurus, Raffinesque, on which he ventures no opinion, Apseud.es, as probably near to 

 Tanais, in the Order of the Isopoda, Family Idoteidas, and lastly lone, Anceits and Praniza 

 as certainly belonging not to the Amphipoda but to the Isopoda. 



