1818.] GENUS LANCEOLA. Sly 



I)oth females, the above (lescriptions are taken ; the 

 tnale not having yet come iimler examination. lam 

 sensible that it is not perfectly consistent with a due 

 degree of cantion, to construct a genns for tlie female 

 of an animal, when, as in this case, the male may pre- 

 sent diverse characters, or such as are much more pro- 

 minent and accessible, although this has been often 

 done. But in tlie present instance we have an animal 

 to give an account of, wliose generic traits widely dif- 

 fer from those of any other as laid down by naturalists, 

 so that in order to be introduced into tbis p?.per at all, it 

 is believed that the formation of a distinct genus is un- 

 avoidable ; this is therefore offered provisionally, to be 

 altered, rejected. Or retained, as the male, wheri disco- 

 vered, may justify. 



Its generic affinities are rather difficult to determine. 

 It is allied to Amphipoda by the vesicular branchiae, 

 and by the caudal appendices to the genus Phronima, 

 more than to any other of this order ; in the external 

 appearance of the mouth there is a great similarity to 

 the Linnsean Oniscii, the labium being nearly the same 

 in form. In general form it somewhat resembles Onis- 

 cus cseruleatus of Montagu, Trans, Linn. Soc, Lond. 

 vol. xi, from which I suppose Doct. Leach has formed 

 his genus Praniza, which, although but slightly charac- 

 terized by Mr. Latreille, in Le llegne Animaly tom. 3, 

 p. 54, and without any reference to books or specimens. 

 is evidently very distinct. 



