and some new Genera of Am phipods. 239 



very strongly marked. In the text of the ( Regne Animal,' 

 p. 179, Milne-Edwards, copying Latreille, 1829, characterizes 

 the species 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. 



Cyrtophium 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 

 variegatus, Leach, entails the cancelling of Platophium, the 

 various species of which must be transferred to the far earlier 

 Podocerus. The list, in my opinion, comprises the following 

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

 cheloniai, Stebbing; chelonophilus (Chevrenx & de Guerne) ; 

 cristatus (G. M. Thomson); Dana-, Stebbing; Darwinii 

 (Bate) ; inconspicuus, Stebbing ; Icevis (Haswell) ; lobatus 

 (Haswell). 



Jf 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 pelagica, 

 and suggested that Montagu's Gammarus falcatus might also 

 belong 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 ' llegne 

 Animal,' pi. lxi. 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 Crustace's,' 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 of falcatus. In 

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

 giaphie du Begne Animal' by roughly copying Montagu's 

 figure of Gammarus falcatus, and, without the least apolooy 

 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 Leach's three species, varie- 

 gatus, pulchellus, 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 



