168 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I, 2. llYPERllDiE. 



Hyperia Latreillei. 



å peu prés les mémes dimensions. Lame terminale de Tabdomen triangulaire, mais obtuse au 

 bout. Artide basilaire des dei-aiéres fausses patés tres-élargi en dedans et presque quadrilatére. 

 Longeur, environ 8 lignes. Couleur brunätre. Habite nos mers.» 



From the generic description of Hyperia, given on the same occasion the follo\v- 



ing passage may be quoted, as certainly belonging to H. Latreillei, and not to the whole 



genus: 



»(Les patés) de la premiére pair s'avancent de chaque coté de la bouche, et ne sont pas 

 beaucoup plus petites que les autres; leur antépénultieme article est un peu élargi en dessous, 

 et son angle antéro-inférieur s'avance en tbrme de dent au dessous de Tarticle suivant; mais ce 

 dernier se prolonge beaucoup plus loin et ne constitue pas avec cette dent immobile une pince 

 didactyle. Les patés de la seconde paire offrent k peu prés le méme mode de conformation; 

 mais leur antépénultieme article et moins développé, et elles sont encore moins propres ä agir 

 comme des organes de préhension.» 



From the last quotation it is clear that the author mistook the first pair of pertpo- 

 poda for the second. In all other respects the description is adequate. 



In 1857 A. White characterized Hyperia Latreillei with the following words: 



»Of a brownish colour, about eight lines long; the lower antenna3 as long as the upper, 

 and of the same form; the first six or seven joints of the filament of upper and lower antennas 

 fused; five last pairs of legs nearly all of the same size; terminal abdominal plate triangulär, 

 blunt at the end.» 



To judge from his reference to »the filament of upper and lower antennas» it is 

 probable that he had examined a young male of the species. He gave on the same 

 occasion a recognisable drawing of the aniraal, and there also the flagellum of the an- 

 tenna3 is indicated as multi-articulate. 



In 1862 Spence Bate described under the name Hyperia galba an animal which 

 must be indentified with H. Latreillei, as far as the imperfect description and drawing 

 allow any identification. From his description I quote: 



»First pair of gnathopoda having the inferior angle of the meros but slightly produced; 

 the inferior angle of the carpus but little produced anteriorly, though somewhat deeply inferiorly, 

 and having the margin furnished with strong stiff spines; pi-opodos cylindrical, shorter than the 

 carpus, but less stout, armed along the inferior margin with a few very minute but sharp den- 

 ticles. Second pair of gnathopoda longer than the first, having the inferior angles of both the 

 meros and carpus raore advanced anteriorly than those of the first pair, and armed with a few 

 straight stiff spines; propodos as long as the carpus, but much more slender, unarmed along the 

 inferior margin; dactylos short, slender, sharp. Pereiopoda subequal, tolerably robust. Peduncle 

 of the posterior pair of pleopoda reaching to the apex of the rami of the preceding pair. Telson 

 lanceolate.» 



In the same work he described a new species, Lefitrigonus Kinahani, which pro- 

 bably is a male of Hyperia Latreillei. The description does not allow of a final 

 judgement in this case, but from the drawing it seems more likely to be H. Latreillei 

 than H. galba. In 1868 Spence Bate and Westwood gave a new drawing and de- 

 scription of the same species, but not sufficiently clearly to settle the question. In this 

 latter drawing the authors represent the second and third ural segments as not coalesced. 

 Their specific diagnosis which is applicable to more than half the number of known spe- 

 cies of Hyperia, runs: 



