EEPOET ON THE AMPHIPODA. g^ 



three dissertations "De Apon. Thermis Patav. 1758." G. D. Nardo, 1869, explains it 

 by " Orchestia littorea," a designation which he also applies to the Cancer locusta, L., of 

 Chiereghin, but the figure which he gives of that species shows that the doubts which he 

 expresses about it are well founded, since it is certainly not an Orchestia. OUvi is not sure 

 of the specific determination of the little marine animals which he had found akin to Cancer 

 linearis, but he takes the opportunity of stigmatising the method of Linuseus as artificial, 

 better suited to facilitate the knowledge of the student, than to show the progression of 

 nature. Hence in the present instance he approves the separation of these insects from the 

 other Granchj, eitlier as was done by Pallas in a separate order of Onischi cancriformi, or as 

 by more recent naturalists in a genus expressly instituted, which he thinks still more 

 convenient. 



1793. FabRICIUS, J. C. 



Entomologia Systematica emenclata et aucta. Secundum Classes, Ordines, 

 Genera, Species adjectis synonimis, locis, observationibus, descriptionibus. Tom. II. 

 Hafnise. mdccxciii. 



Tlie Agonata are here the eighth class, with eleven genera, Lirindus, Monoculus, Cijmothoa, 

 Cancer, Parjurus, ScyJlarus, Hii:iim, Galathea, Astacus, Squilla, Gammarus. Gammarus 

 has fourteen species, Gammarus carinatus being now included, of which the present name 

 is Atyliis carinatus. The account of Gammarus gibbosus does not vary from that which 

 Fabricius gave of the same species in 1775, under the name Oniscns gibbosus. It belongs 

 to the Hyperina, possibly Boeck suggests, to AmjyJupi-oiioe, Sp. Bate, a genus which Claus, 

 1879, though with much hesitation, supposes to be perhaps the same as hia own 

 Parapronoe. Opposed to Boeck's suggestion are the facts that in Anqilnpronoe and 

 Parajironoe the perseon is not especially gibbous, its first segment is not very short, and thfr 

 pleon has five distinct segments besides the telson, with which the fifth and sixth are not 

 coalesced as in Dithyrus or HemHg])Jiis. To Cymothoa, a new genus among the Agonata, 

 Fabricius in this work refers " Oniscus ceti, Mant. Linn. p. 509." The genera Oniscus, 

 Scolopendra and JuJus form the class Mitosata. For " Astacus Homari " of this work, see 

 notes on Herbst, "58," and on the Supplementum Ent. Syst. 1798. 



1796. Heeb.st, Johanx Friedhich Wilhelm, born 1743, died 1807 (Hagen). 



Versuch einer Naturgeschicbte der Krabben und Krebse nebst einer .systematischen 

 Beschreibung ihrer verschiedenen Arten. Zweyter Band mit xxv Kupfer-Tafeln und 

 Register. Krebse. Berlin und Stralsund, 179G. 



In this volume, pages 2, 3, Herbst quotes the definitions given by Fabricius m his Mantissa 

 of Cancer, Gammarus, and the intermediate genera, and rejects them on the ground that 

 they draw marks of distinction only from the antennae. He himself makes six divisions 

 of Crustacea (das ganze Krebsgesclilecht), the sixth of these divisions being the Garneel- 

 asseln, with the definition " diese haben mehr als acht Fiisse, und oft gar keine 

 Scheeren." 



On page 105 the Gameelasseln are also called " Onisci gammarelli," the name given by Pallas. 

 Of these he forms two families, the first " mit uugetheiltem Brustschilde " containing no 

 Amphipods, unless, as seems most probable, AmathiUa sahini, Leach, be in reality the 



