PLATE II. EXPLANATION. 43 



Class Crustacea. Ord. Amphipoda. 



Genus Bathypoeeia, Lindstrcem, Comm. Acad. Holm. a.d. 1855, p. 59. 



Antennas superiores articulo primo pedunculi magno et tumido, flagello 

 appendicular! perpusillo. Antennae inferiores pedunculo gracili, fere duplo 

 longiore pedunculo superiorum. Mandibulce apice valde acuminato ; palpo 

 triarticulato, articulo secundo crasso. Palpus pedum maxillarium articu- 

 latus ; articulo secundo lato et foliaceo ; tertio gracili, curvo et non ut ple- 

 runque ad apicem articuli praecedentis, sed palpi appendicularis modo, ad 

 marginem exteriorem affixo. Pedes thoracici primi pares perbreves, 

 debiles, articulo ultimo pyriformi, ungue valido. Pedes secundi paris prse- 

 cedentibus duplo longiores, ungue carentes. Pedes tertii quartique paris 

 inter se similes, ultimo articulo longo, gracili, curvo, ungue rudimentario. 

 Pedes quinti paris femore magno clypeiformi, articulo tertio lamelloso, ar- 

 ticulo quinto sine ungue. Epimera parva, margine setis instructo. Pedes 

 natatorii forma vulgari. Pedes spurii quarti quintique paris breves. 

 Pedes spurii sexti paris forma singulari : pars basalis duplo longior quam 

 latior ; ramus finalis interior rudimentarius et forma folii acuminati ; ramus 

 exterior magnus, biarticulatus ; articulo primo lamelloso, parte basali ter 

 ongiore ; articulo secundo parvo acuminato, setis instructo. 



The upper Antennce shorter than the lower; Scape three-jointed; the first 

 joint considerably larger than the other two together, enlarging from a slender 

 base to the outer margin, and there obliquely truncated, so that the upper angle 

 projects considerably beyond the lower; the two other joints slender, short, 

 and cylindric; Flagellum composed of five cylindric joints, which diminish suc- 

 cessively in length and thickness. Accessory flagellum two-jointed ; the first 

 joint in length and form resembling the first of the primary flagellum ; the 

 second small and almost rudimentary. The lower Antennce extend beyond the 

 upper, in consequence of the length of their Scape ; the first two joints of this 

 are short and broad ; the third the longest, somewhat incrassated towards the 

 end, and four times the length of the second joint; fourth joint one-half smaller 

 than the third ; Flagellum short, little longer than the second joint of the scape ; 

 composed of seven joints, which resemble the corresponding joints of the 

 upper pair, but are rather shorter. Both pairs of antennae are clothed with 

 short bristles. Eyes black, small ; somewhat produced and slightly reniform, 

 placed immediately under the margin which bears the upper pair of 

 antenna?. Mandibulce with a produced slender point ending obtusely. Palpi 

 inserted on a conical projection of the hind margin of the mandible; three 

 jointed; first joint very small; second much dilated on the inner edge, and 

 there beset with some diverging bristles; last joint falcated, with several bristles 

 at the obtuse tip. Palpus of Maxillary feet four -jointed ; the first joint short and 

 broad ; only half as long as the second, which is of uniform breadth, flattened 

 on the upper side, and thickly clothed with short hairs on the inside ; third joint 

 only a third as large as the preceding ; attached to the hind margin of the 

 second, as if it were an accessory palpus, but being strongly curved, it stretches 

 over the outer margin of the second joint; fourth joint minute, rudimentary, 

 with two minute spines at the top, but no trace of a claw. The outermost of the 

 two laminae belonging to the maxillary feet is the longest, and reaches to the 

 middle of the second joint of the palpus ; the inner one half as long, with a strong 

 toothlike process of the margin. The first pair of feet is the smallest and 

 slightest, about half as long only as the others ; the first joint makes half of its 

 length, and has a slight double curvature ; the last joint is oval, or pear-shaped, 

 with a pretty stout claw, and several rows of bristles. Second pair as large and 



