11 



Camacea: 1. Vaunfchompsoniidae, 3. Bathycuma 



4. B. elongatum H.J.Hansen 1895 B.elongata, H.J.Hansen in: Ergeb.Plankton- 

 Exp., u 2G.C p. 57 t. 6 f. 6, 6a, b; t. 7 f. 1, la— e | 1905 B. e., Caiman in: Sci. Invest. 

 Fish. Ireland, 1904 app. 1 p. 18 | 1908 JS. e, Zimmer in: Ergeb. 

 Tiefsee-Exp., «. 8 p. 165, 166 | 1912 B. elongatus, T. Stabbing in: 

 Ann. S. Afr. Mus., v. 10 p. 135. 



Body very elongate. Pseudorostrum acute, a little 



depressed, antero-lateral corners acute, lower margin for 



some distance serrate. Carapace nearly twice as long as 



^ — ^ I deep, strongly compressed, with a serrate carina only on 



I \ the front third portion. Pedigerous segments and pleon 



L^ ^ \ not carinate, second segment of pleon notably shorter than 



1^* or 3^; telsonic segment produced in semi-oval shape 

 between bases of uropods. Eye wanting. Antenna 1 with 

 l^t joint dentate, 3^^ longer than 2^^, flagellum 2-jointed, 

 1^* joint rather longer than 2^^ the accessory minute, 

 but also 2-jointed. Antenna 2 with 4 plumose setae. 

 Mandibles elongate, the basal part shorter than that beyond 

 the molar, spine-row of 17 spines. Maxilla 1 with dilated 

 hook-like end to the longer filament on the palp. Maxilliped 1 

 broad, a longitudinal series of 8 branchial leaflets on the epipod. Maxilliped 2 

 extremely slender. Maxilliped 3 with 2^"^ joint twice as long as rest of liml), but 

 produced apex not quite reaching apex of 4*'' joint, which distally carries a 

 submarginal row of teeth. Peraeopod 2 as described differing from other species 

 of the genus by absence of the third joint. Peduncle of uropods longer than 



Fig. 8. 



B. elongatum Hansen, 



mandible. 



Fig. 9. 



B. elongatum Hansen, a autenua i and 2, b telson and uropods. 



the equal stout rami, exopod with 13 spines on lateral margin, 3 at apex, and 

 7 or 8 plumose setae on medial margin, endopod with 7 unequal spines on 

 medial margin and apex of 1^* joint, and on the slightly shorter but much 

 narrower 2^^ joint 5 small spines to the medial margin and 2 long on the 

 apex. Colour clear greyish. L. 9 (not fully adult) 12-5 mm. 

 Lat. 18« 6' N., long. 26» W. (North Atlantic), depth 4980 m. 



5. B. natalense Stebb. 1912 B. nataknsis, T. Stebbing in: Ann. S. Afr. Mus.. 

 V. 10 p. 135 t. 49. 



