KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 135 



In 1830 H. MiLNE Edwards gave the following new diaguosis, accepting the narae 

 H3'periii, Latreille: 



»Tete tres-grosse et arrondie; tliorax renflé et divisé en sept segniens qiii ont tous ä peu 

 ])rés la meme longeur; antennes subulées, sans tige terminale annellée; pattes gréles, non préhen- 

 siles et ayant toutes k peu prés la méme forme; abdomen portant comme d'ordinaire six paires 

 de fausses pattes.» 



By this definition he confined the genus to the female foi-rns only instituting at 



the same tirae a new genus Lestrigonus for a inale form of a true Hyperia, with the 



following diagnosis: 



»Tete trés-grosse et renflée; premier segment du thorax rudiraentaire; abdomen plus grand 

 que le thorax; antennes k peu pres de méme longeur, terminées toutes par une longue tige 

 subulée, multi-articulée. Aucune patte n'est préhensile, mais celles de la seconde paire pre- 

 sentent une espéce de petite main formée par Tantépenultiéme article, etc, etc.» 



It may be observed that not only Latreille seems to have noticed the difierent 

 form of the antenn» in the two sexes, but that Montagu') as early as in 1813, when 

 describingw Cancer Gammarus galha^^ expressiv called attention to the sexual dimorphism 

 in the form of the antennas, and in 1824 E. Sabine^), speaking about ^>Talitrus Cyanecxy, 

 recorded and hgured both male and female antennas, not recognizing, however, the sexual 

 difterence. Particulars of these early, but valuable, descriptions will be found below under 

 »Hyperia galba» and »H. medusarum». Thus it was H. Milne Edwards who gave 

 rise to the misunderstanding of the sexual forms of Hyperia, which have caused so much 

 difficulty that the matter has remained an open question among carcinologists up to the 

 present time. 



In 1838 H. Milne Edwards gave generic diagnoses of Hyperia and Lestrigonus, 

 without adding any new characteristics. In 1840 he gave a new, elaborate and excellent 

 description of Hyperia; this description however contains many purely specific charact- 

 eristics relating to Hj^peria Latreillei; these specific characteristics will be accounted 

 for below under that species. At the same tiine he repeated his former description of 

 Lestrigonus. It must be noticed that he (1. c. p. 77) described as belonging to Hyperia a 

 new species H. Gaudichaudii, with the characteristic: »Antennes égales et terminées par 

 un filet multi-articulé assez long pour atteindre le quatrieme segment du thorax^\ but 

 according to his view he ought rather to have ranged it in the genus Lestrigonus, as 

 Spence Bate subequently did in his »Catalogue». ^) 



I quote here a part of his generic description: 



» — — La tHe, est trés-grosse, renflée et verticale; les yeux en occupent la plus grande 

 partie, et present un grand nombre de petites facettes ou cornéules, au milieu de chacune des- 



') "George Montagu. Descriptions of several new or rare Aniinals, principally marina, disoovered on the 

 South Coast of Devonshire.» Transactions of the Linnean Society of London. Vol. 11, part 1, p. 4. (Here I 

 may remark that the author confoiinds the sexes, calling the male female, and vice versa.) 



-) £. Sabine. »Itivertebrate Aniraals», in A supplement to the appendix of Captain Parry's voyage for 

 the discovery of a North-West passage in the years 1819 — 20. Containing: an account of the subjecls of Natural 

 History, p. ccxxxiv. London, 1824, 4:to. 



*) C. Spence Bate. Catalogue of the specimens of Amphipodous Crustacea in the collection of the 

 British Museum, p. 289. 



