284 CARL BOVALLIUS, AMPHIPODA HYPElillDEA. I. 2. HYPERIID^. 



Euthemisio Uhellula. 



Themisto crassicornis, H. KEOEYER. SpenceBate and Westwood. iÄ6'7. A History of the British 



Sessile-eyed Crustacea. 

 Vol. 2, p. 523, fig. 

 1887. EuthemistoNordenskiöldi.CBOYALLUJS. — »Systematical list of the 



Amphipoda Hyperii- 

 dea». Bih. t. K. Sv. Vet. 

 Ak. Handl. Bd. 11. 

 N:o 16, p. 22. 

 » » » — 1887 . »Arctic and Antarctic 



Hyperids». Vega-Exp. 

 Vetensk. Iakttagelser. 

 Bd. 4, p. 570, pl. 47, 

 fig. 104—110. 



The original description was published in 1822 by M. W. Mandt, but really drawn 

 up by H. Lichtenstein from the specimens which Mandt had brought home from Green- 

 land/) The description runs: 



»G(ammarus) capite inagno globoso, corpore segmentis undecim, pedibus quatuordecim, 

 octo anticis brevibus, uncinatis, raptatoriis, sex posticis elongatis, saltatoriis. 



Longitudo tota cequat pollicem et dimidium. 



Cor2:)us compresso-cylindraceiim, incurvatum, saltatoriuni. Caput globosum, utrinque in- 

 flatuni, hemisphferio utroque oculum magnum sessilem mentiente. 



Antenii£e breves, scrobiculis profundis frontalibus implantata;, supera; breviores, (sesqui- 

 lineares) articulo basali et seta apicali subtriquetra, conflata;, infera; paullo longiores, bilineares, 

 triarticulata;. 



Mandibulfe exigua?, inasquales, argute dentatag. Palpi mandibularum latere externo in- 

 serti, quadriarticulata;, in fossulam frontalem inter antennas inferiores reclinandi. Segmenta 

 corporis primum, secuudum, tertium quartumque, angusta, sensini latiora utrinque in appendicem 

 foliaceam articulatam producta, subtus pedes gerentia breves raptatorios, inde e primo pari sen- 

 sim luaiores, femoribus complanatis, manibus incrassatis subtus spinescentibus, pro recipiendo 

 unguiculo valido, elongato. Segmenta quintum, sextum et septimum paullo latiora, lateribus 

 vix appendiculatis, margine externo cum pedibus articulo iuncta elongatis, saltatoriis, postice 

 complicandis, corpore incurvato pedes octo anticos inter se occultantibus. Horum femora com- 

 planata, margine postico foliaceo pro tegenda tibia reclinanda, tibiffi geniculo basali brevi, elon- 

 gato, compressaj, antice spinescentes, postice glaberrimfe; tarsi graciles, subcylindrici, rigidi, 

 margine antico spinescente tibiis applicandi, apice unguiculo minuto acutissimo instructi. Pedum 

 par quintum omnium longissimum fere pollicare, tibiis quatuor et dimidiam lineas longis, sextum, 

 septimum sensim breviora, postremo octo lineas longo. 



Segmenta octavum, nonum et decimum, caudalia omnium latissima fere cylindrica 

 subtus appendicibus ovigeris natatoriis, in singulo binis bifidis, articulo basali valido, conico, 

 subtus unisulcato, lacinia terminali duplici, acuminata, subtriquetra, ciliata. 



Segmenta undeciraum duodecimumque, flabellum caudale efformantia, appendicibus 

 utrinque tribus bifidis conflatum, quorum articuli basales elongati, compressi; lacinire terminales, 

 in singulo binse infequales, altera longiore foliacea, altera breviore accessoria teretiuscula. Color 

 flavescente lividus.» 



•) Compare the wording in Mandts above quoted paper p. 31 and 32: 



»E crustaceorum ordine duas ex itinere retuli species, Oniscis marinis Lin: aut Gammaris Fabricii 

 accensendas nec ab ullo auctore hucusque descriptas. Qixe cum museo locupletissimo hujus Universitatis a me 

 oblata essent a viro celeberrimo huius Musei directore Lichtenstein accuratius examinatae, dignpe visse sunt quarum 

 descriptio amplior huic dissertation! inseratur. Qualem vir doctissimus benevole mecum communicavit lectoribus 

 naturae curiosis hic offero.» 



