and some ne^o Genera of Amph{2yods. 239 



very strongly niavked. In the text of tlie ' Regne Animal,' 

 p. 179, ]\liliic-E(l\vards, copying Latreille, 1820, characterizes 

 the sjjecies simply by three words — " A yeux saillans." As 

 it happens they suffice, since the figure supplies a second 

 striking feature in the greatly elongated terminal joint of the 

 peduncle of the lower antennae. 



Ci/rtophium Darwinii, on Spence Bate's own showing, 

 ought to have been referred to Dana's other genus Plato- 

 phium. Now, therefore, its identification with Podocerus 

 variegatiis, Leach, entails the cancelling of Platophium, the 

 various sj)ccies of which must be transferred to the far earlier 

 Podocerus. The list, in my opinion, comprises the followini' 

 ten species : — andamanensis (Giles) ; hrasiUensis (Dana) ; 

 chehnicv, Stebbing; chtlonophilus (Chevreux & de Guerne) ; 

 crisfatus (G. M. Thomson); TJamv, Stebbing; Darwinii 

 (Bate) ; inconspicuus, Stebbing ; hcvis (Haswell) ; lohatus 

 (Haswell). 



If this view of Podocerus be accepted, as I think it must, 

 the obvious and necessary consequence is that Jassa will be 

 upheld as a distinct genus, with the species pulchella, Leach, 

 for its type. Whether the specific name pulchella should be 

 retained is a separate question. Leach, as already noticed, 

 instituted a second species of Jassa under the name pelaqica, 

 and suggested that Montagu's Gammarus falcatus might also 

 beloiig to the genus. What Leach could not determine, later 

 authors with more or less confidence, and with unanimity less 

 rather than more, have settled for him. In the ' R^o-ne 

 Animal,' pi. Ixi. fig. 2, Milne-Edwards claims to give a 

 representation of Leach's Jassa pelagica^ and in fig. 3 

 undoubtedly does represent Leach's Jassa pulchella. But in 

 the text he refers both fig. 2 and fig. 3 to Jassa pulchella. 

 Then, in the ' Hist. nat. des Crustacds,' 1810, he describes 

 the species Cerapus pelagicus^ with Cancer falcatus, Mon- 

 tagu, and Jassa pelagica^ Leach, in the synonymy, thus 

 acknowledging but disregarding the priority oi falcatus. In 

 this Guerin-Meneville had set the example in the * Icono- 

 graphie du Efegne Animal ' by roughly copying Montap-u's 

 figure of Gammarus falcatus, and, without the least apology 

 or explanation, calling it Jassa pelagica, Leach. As Lord 

 "Nelson was fond of saying, " Such things are." Subse- 

 quently the claims of falcatus were vindicated with so much 

 vehemence that by some authors Leaches three species, varie- 

 gaius, indcJtellus, and pelagicus, have all been reduced to 

 synonyms of it. But he must be a bold naturalist who will 

 affirm that he knows for certain what Montagu's species 



