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



In 1830 H. Milne Edwards gave the following new diagnosis, accepting the name 

 Hyperia, Latreille: 



»Tete tres-grosse et arrondie; thorax reufle et divise en sept segmens qui ont tous a peu 

 pres la meme longeur; antermes subulees, sans tige terminale annellee; pattes greles, non prehen- 

 siles et ayant toutes a peu pres la meme forme; abdomen portant comme d'ordinaire six paires 

 de fausses pattes.» 



By this definition he confined the genus to the female forms only instituting at 



the same time a new genus Lestrigonus for a male form of a true Hyperia, with the 



following diagnosis: 



»Tete tres-grosse et renflee; premier segment du thorax rudimentaire; abdomen plus grand 

 que le thorax; antennes a peu pres de meme longeur, terminees toutes par une longue tige 

 subulee, multi-articulee. Aucune patte n'est prehensile, mais celles de la seconde paire pre- 

 sentent une espece de petite main formee par Fantepenultieme article, etc., etc.» 



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

 form of the antennas in the two sexes, but that Montagu 1 ) as early as in 1813, when 

 describing)) Cancer Gammarus galba» expressly called attention to the sexual dimorphism 

 in the form of the antenna?, and in 1824 E. Sabine 2 ), speaking about »Talitrus Cyaneaw, 

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

 difference. 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 Hyperia Latreillei; these specific characteristics will be accounted 

 for below under that species. At the same time 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 egales et terminees par 

 un filet multi- articule 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». s ) 



1 quote here a part of his generic description: 



» — — La tete est tres-grosse, renflee et verticale; les yeux en occupent la plus grande 

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



1 ) »George Montagu. Descriptions of several new or rare Animals, principally marine, discovered 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 confounds the sexes, calling the male female, and vice versa.) 



2 ) E. Sabine. "Invertebrate Animals», 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 subjects of Natural 

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



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

 British Museum, p. 289. 



