BOVALLIUS, SOME AJEPHIPODOUS GENERA. 



proposed by Latreille as being generally known amoug the 

 carcinologists. This was a very fortunate mistake by Milne- 

 Edwards, as tlie Lanceola, Say, bas notbing at all to do witb 

 tlie Hyperia LåTR., and be woiild bave created an inextricable 

 confusion in tbe synonymy, if be bad put tbe former in tbe 

 place of tbe latter. But tbe animal described by Sat seems to be 

 very rare; becanse, as far as I kuow tbe literature concerning 

 tbe Hyperids, it bas never since been described or mentioned 

 in its true cbaracters. Milne-Edwards still beld the same 

 opinion about tbe identity of Lanceola in 1840 ^), and ranged 

 it among tbe doubtful species of Hyperia as Hyperia pelagica, 

 Say. 



About twenty years låter C. Spence Bate -), in bis Cata- 

 logue of Ampbipoda, classified it as synonymous witb Vihilia, 

 Milne-Edwards. He declared tbe description of Say to be very 

 obscure, wbicb is natural enougb, because, as will be seen from 

 tbe description below, Say's type must be allowed to be wide- 

 ly diiferent from a Vibilia. Since tbe publication of tbe above 

 named work all following autbors bave agreed witb Spence 

 Bate in interpreting Lanceola pelagica as a Vibilia. 



Examining a large number of Vibilidse from all parts of 

 tbe world, it soon became clear to me tbat I must try to find 

 tbe original Lanceola among otber Hyperidae. I made it out 

 at last, identifying it witb a large Hyperid, previously marked 

 as a new genus in my manuscript, and I don't tbink I was 

 wrong in doing so. Tbe following j^arallel arrangement of 

 Say's and my descriptions will show the reasons for my sup- 

 position. Tbe description of Say is given in bis own words, 

 only the order is a little changed to render it more systematic. 

 Of course the generic description of Say contains many purely 

 specific cbaracters, as he knew only one species. On that 

 account I also admit into my description cbaracters of less 

 than generic value, only for tbe sake of comparison. 



Lanceola Say p. 

 Head very short, transversal. 

 Front concave, clypeus projecting 

 into an acute ans:le. 



Lanceola p. 

 Jlead very short, transversally 

 truncated. Front concave, the middle 

 of it projecting into an acute angle 

 or rostrum. 



') »Histoire naturelle des Criistacés*. Torne 3. Paris 1840. Pag. 77. 

 ^) iCatalogue of the specimens of Amphipodous Crustacea in the coUec- 

 tion of \he British Museum». London 1862. Pag. 299 and 304. 



