tCOiSIGL. sv. VET. AKÄDEMIKNS IIANDLINGAU. HAND. 22. N:0 7. 177 



From this diagnosis it would have been iinpossible to identify the species — and thc 

 inore so as the aulhov did not give any drawing of it — if the typical spocirneii h;id not 

 been presei'ved in the collection of the »Musée du Jardin des Plantes». It is (Mie of the 

 precioLis speciinens in the iine collection entvusted to me by Professor Alphonse Milne 

 Edwards. From this specimen the description below and the drawing on plate X are taken. 



In 1849 NicoLET gave the following diagnosis and desci-iption: 



»H. antennis supevioribus inferioribuspue fequalibus, seta multiarticulata termiuatis; lamina 

 terininali abdoniinis triangulari, apice obtusa.» 



»Antenas iguales, terminadas por un filete multiarticulado, bastante largo para llegar al 

 cuarto segraento toråcico; påtas de los cinco ultimos pares casi de igual dimension; el abdomen 

 concluye en iina lamina triangulär, obtusa en la punta; articulo basilar de las ultimas falsas påtas 

 mny ensanchado por dentro y casi cuadrilåtero. Longitud, 7 lin.» 



This description is however only a translation from H. Milne Edwards. 



In 1862 Spence Bate gave for the first time a raore elaborate description and the 

 first drawing of the animal, probably taking them from the very same specimen that I 

 have examined. ') His description runs: 



nLestriffoiius Gaudichaudii. Cephalon transversely ovate. Superior antennre reaching to the 

 fourtli or fifth segment of the pereion; first joint of the peduncle short, but longer than the second 

 and third together; first articulus of the flagellum twice as long as the peduncle, and tapering 

 to the distal extremity, the other articuli of the flagelluni being short — those near the base not 

 longer than broad. Inferior antennfe a little shorter than the superior; the peduncle concealed 

 as far as the extremity of the fourth joint; fifth joint slightly curved, and reaching to the extre- 

 mity of the peduncle of the superior antenna;: first articulus of the flagellum as long as the last 

 joint of the peduncle: the remaining articuli, being very short, resemble those of the superior 

 antennaj. First pair of gnathopoda small, having the carpus and meros but slightly produced 

 inferiorl}', and the antero-inferior margin fringed with hairs; propodos of the same length as the 

 carpus, niuch narrower, and almost cylindrical; dactylos very short — too short to antagonize 

 with the produced extremity of the carpus. Second pair of gnathopoda rather longer than the 

 first, and having the carpus and meros more produced than those of the first; propodos scarcely 

 longer than the carpus, not half its width, and having the superior and infei-ior margins fringed 

 with hairs; dactylos about half the length of the propodos, and capable of reaching the extre- 

 mity of the produced carpus. Pereiopoda subequal and tolerably robust. Antepenultiniate and 

 penultiniate pairs of pleopoda short, subequal: ultimate pair longer, the peduncle extending to 

 the extremity of the preceding pair; rami half the length of the peduncle. Telson broadly lan- 

 ceolate.» 



In 1888 Stebbing gave a complete description and excellent drawings of the male 

 of Hyperia Gaudichaudii, with respect to which I shall merely restrict myself to a few 

 characteristics which are especially important for the distinction of this species from the 

 two closely allied H. Latreillei and H. galba. 



') See Spence Bate's »Catalogue» p. 289. 



K. Sv. Vet. Akad. Handl. Band. 22. N:. 



23 



