Cumacea: 1. Vaunthompsoniidae, 3. Bathycuma 13 



to end of 4**> joint. Peraeopod 1 with 3'^ joint longer than broad, 5*^ and 

 7^^ subequal, each shorter than 6*'^ Peraeopod 2 with 5*^ joint longer than 

 4*^ 7*^^ than 5*^^. Peduncle of uropods subequal to telsonic segment, pro- 

 bably longer than eudopod. L. 9 immature 18-5 mm. 

 Off San Diego (Califoruia). Depth 1174—1218 m. 



2. B. brevirostre (Norm.) 1879 Leucon hrevirostris, A. M. Norman in: Ann. 

 nat. Hist., ser. 5 v.'d p. 71 | 1896 Vaunthompsonia caeca, J. Bonnier in: Ann. Uuiv. Lyon, 

 u26 p. 536 t. 28 f. 3a— s | 1905 Bathycuma hrevirostris, Calmaa in: Sci. Invest. Fish. 

 Ireland, 1904 app. 1 p. 18 ] 1908 B. (Vaunfompsonia?) b., Zimmer in: Ergeb. Tiefsee- 

 Exp., V.8 p. 165, 166 | 1912 B. &., T. Stebbing in: Ann. S. Afr. Mas., v. 10 p. 135. 



9 . Pseudorostrum very short, broad, rounded, edge minutely serrate 

 (Norman), upper margin horizontal, without serrations (Caiman), antero-lateral 

 angle greatly produced, acute. Carapace once and two thirds as long as 

 deep, widest behind the middle, medio-dorsal line gently arched, its numerous 

 denticles in an irregularly double alternating line. Maxilliped 1 in d with 

 5 branchial leaflets on the epipod. Maxilliped 3 with row of strong teeth 

 on lower surface of 2"*^ joint of which the apex reaches end of 4*^ joint 

 and carries setae reaching end of G*'' joint. Peraeopod 1 long, slender, 

 2^^ joint strongly spined, 5^^ and 7*'' joints each '■^/./'* as long as the 6*''. 

 Peraeopod 2 with 4^'^ joint longer than 5^^, 7^^ than 4^'^\ Peduncle of uropods 

 subequal to endopod with 5 spines on medial margin in 9,7 in d, 10 spines 

 on medial margin of endopod' s l"^* joint, 5 on the 2^^*^ which is nearly %^^'' 

 as long as the 1***; exopod a little longer than the endopod. L. about 10 mm. 



S. of Rockall, lat. 56" 26' N., long. 14" 28' W., depth 205 m; 77 miles W. N.W. 

 of Achill Head, county Mayo, Ireland, depth 699 m; Bay of Biscay, depth 350—1710 m; 

 Mediterranean, depth 950 — 1100 m. 



3. B. longirostre Calm. 1905 B. longirostris, Caiman in: Siboga-Exp., pars 

 36 p. 2, 9 t. 2 f. 13, 14 \ 1908 B. {Vauntompsonia?) L, Zimmer in: Ergeb. Tiefsee-Exp., 

 v.8 p. 166 I 1912 B. l, T. Stebbing in: Ann. S. Afr. Mas., v. 10 p. 135. 



Pseudorostrum long, about ^/^^'i of length of carapace, horizontal, acute, 

 the sinus nearly semicircular, antero-lateral angle acute. Carapace nearly 

 thrice as long as wide, and more than twice as long as deep, its medio- 

 dorsal line rather convex, sharply carinate, with double row of alternating 

 teeth, the eyeless eyelobe narrowly wedge-shaped. Fourth pedigerous segment 

 with sideplates produced forwards as narrowly rounded lobes. Pleon rather 

 long and stout, smooth, telsonic segment produced as a prominent rounded 

 lobe between the bases of the uropods. Antenna 1 with last joint of peduncle 

 slightly swollen, flagellum 2-jointed, 1^^ joint twice as long as 2"^, accessory 

 2-jointed, very short. Maxilliped 3 with a few teeth distally on the 2°"* joint, 

 of which the serrate setose apex reaches end of the 4*'i joint. Peraeopod 

 1 with 2"*i joint strongly denticulate, 7^'' joint longer than h^'^\ a little shorter 

 than the 6*^ Peraeopod 2 with 2""^ joint very short, 7*'' long and slender. 

 Peraeopods 3 and 4 subequal in length, but exopod of 3*^ equal to that of 

 2"*^ and nearly double that of the 4*^ Peduncle of uropods subequal in length 

 to telsonic segment, with 13 unequal spines on the medial margin; exopod 

 about '^/g*^^ as long as the peduncle, with spiuules on lateral margin and 

 long setae on the medial; endopod a very little shorter, its first joint not 

 much longer but much stouter than the second, each with 9 spines of varying 

 length on the medial edge. L. 6 (immature) 12 mm. 



Lat. 5" 40'-7 S., long, 120" 45'-5 E. (Malayan Archipelago), depth 1158 m. 



