228 THE VOYAGE OF H.M.S. CHALLENGER. 



1849. Caspar Y, Robert. 



Gammarus puteanus Koch. Beobaclitet von Dr. Robert Caspary. Mit Abbikl- 

 imeen. Tab. II. Verhandl. I. Naturf. Vereins fiir Rheinland. Jahrg. 6. Bonn, 

 1849. pp. 39-48. 



In tlie full and fairly accurate description which Caspary gives, he obviously falls into error 

 when he says that the iutestinal canal (der Darui) runs from the head to the tenth segment 

 in which it opens, the tenth segment in his reckoning being the second of the pleou. Of 

 the last three perjeopods he says that " das Thier streckt sie iiber den Eiicken hinaus, wii- 

 Fig. XIX. zeigt und kriecht, auf dem Riicken liegend, ofters auf ihnen." I think it may 

 be safely said that the creature much more usually crawls with the ventral side downwards, 

 the extremities of these perseopods being extended upwards out of use. 



Bate and Westwood are inclined to think " Niphargus Kochianus," Sp. Bate, identical with the 

 specimens " described and figured by Caspary and Hosius, referred to in the synonym*; 

 under N. aquilex." But their Niphargus kodiiauus is expressly distinguished from 

 Xipjhargus aquilex by its second and third pleon segments having the infeio-posterior angle 

 acute. Caspary's figure agrees with their Niphargus aquilex in having that part rounded. 



1849. Dana, James D. 



Synopsis of the Genera of Gammaracea. The American Journal of Science and 

 Arts, Second Series, Vol. viii.-No. 22. Nov. 1849. pp. 135-140. 



The tribe of Amphipoda here includes the subtribes Gammaracea and Hyperiacea, the former of 



which consists of six groups or families. 

 Fam. I. ORCHESTiDiE, with the genera Talitrus, Latreille, Orchestia, Leach, Allorchestes, Dana. 

 Fam. II. Gammarid/E. Subfam. I. Lysianassin;e, with the genera thus grouped : — 

 La. L(/i>"w?iassa, Milne-Edwards ; Phlias, Gnecin ; h. Sfegocepihaius,'K.r0yej:. II. Op/y, Kr0yer ; 



Uristes, new. III. Anonyx, Kr0yer ; Stenia, now. IV. Poiifoporeia, Kr0yer. 

 Subfam. II. Gammarinse., with these groups: — I. Alihrotus, l\Iilne- Edwards ; Acanthonotiw, 



Owen. II. Leptoehirus, Zaddach. III. A. #. a, Gammarus, Fabr.; Amphitliik, Leach ; b. 



Photis, Kr0yer ; CEklicerus, Kr0yer. f- Lewothoe, Leach ; Erichtlionius, Milne-Edwards ; 



Pardalisca, Kr0yer. B, Iscliijruceras, Kroyer. IV. A. Lepidadylis, Say ; Protomedeia, 



Kr0yer ; Ampelisca, Kr0yer ; Aora, Kroyer. B. Phoxus, Kr0yer. 

 Subfam. III. Isaeinse. A. Issea, Milne-Edwards ; Anisopus, Templeton. B. Laphystius, Kr0yer. 

 Fam. III. Corophida3. a. Ceraj;orfi«ft, Milne-Edwards; Ceropas, Say. b. * Coco2)7im>», Latreille; 



PoiJocerus, Leach, f Unciola, Say ; Afylus, Leach. J Clydonia, Dana, new. 

 Fam. IV. Icilidoe. Pterygocera, Latreille ; Icilius, new. 

 Fam. V. Cheluridse. Chelura, Philippi. 

 Fam. VI. Dulichidae. Dulichia, Kr0yer. 

 Fr. ;M idler having in 1848 denied the propriety of separating the Orcliestix and Talitri, Dana 



remarks, " There is however a wide difference between the species having a styliform joint 



terminating the second pair of legs and those with a hand however minute or obsolescent. 



The only safe course appears to the writer to consist in drawing the hne between speciex 



having a finger or daw however small or large, dosing up)on the fifth ^oint, and those species 



having an extended finger or daw not dosing up." 

 The new genus Allordiestes, identical with Nicea, Nicolet, published in the same year 1849, and 



probably the same as Hyale, Rathke, 1837, is thus defined: — "Pedes primi secundique 



