Cumacea: 1. Vaunthompsoniidae, 3. Bathycuma, 2. Sympodommatidae, 1. Sympodomma 15 



Pseudorostrum acute, slightly upturned, the lobes meeting for a short 

 distance in front of the little triangular eyeless eyelobe. Carapace about a 

 quarter of the body's total length, rough with minute denticles, the medio- 

 dorsal line carinate, the first 3^ showing spinules in double line, commencing 

 on the eyelobe and fading away into a single line towards or to the hind 

 margin. 1^* pedigerous segment seemingly united to the 

 carapace. Pleon segments 1 — 5 with lower borders flat- 

 tened; telsonic segment produced between bases of uropods 

 to an almost semicircular partially serrate border. Antenna 1 

 with 1^^*- joint geniculate, 3^^ joint longer than 2""^, l^*' joint 

 of the 2-jointed flagellum dilated near the base and fringed 

 with long filaments, the minute 2-jointed accessory having 

 a close-set fascicle of very long setae. Mandibles with spine- 

 row of 21 spines, but basal part of trunk longer than the 

 distal section. Maxilliped 1 with 8 branchial leaflets in 

 longitudinal series on the epipod. Maxilliped 3 with apex 

 of 2^^ joint well produced and serrate on the medial margin. ^^ ^^ 



Peraeopod 2 with short 3*^ joint, the spinose 7*^^ as long as ^ nataiense steb- 

 5*^^ and 6*'^ joints combined. Pleopods with peduncle little bing, mandible, 

 longer than the subequal setose rami. Exopod of uropod 

 about "74*^^ of the length of the spinose peduncle, with 8 spines on the medial 

 margin, endopod scarcely shorter, with 21 spines on medial margin of the 

 P*^ joint, 2"*^ joint much thinner, more than half as long, with a dozen little 

 spines on the medial margin. L. d 11 mm. 



S. Africa, Cape Natal N. by E. 24 miles, depth 805 m. 



2. Fam. Sympodommatidae 



1912 Sympodommatidae, T. Stebbing in: Ann. S. Afr. Mus., «;. 10 p. 131, 133, 138. 



Telson wanting. Accessory flagellum of antenna 1 very small. Antenna 

 2 of 9 2-jointed. Palp of maxilla 1 with 2 filaments. First 3 pairs of 

 peraeopods in 6 and 9 with well developed exopods. (S with 5 pairs of 

 pleopods. Uropods with 2-jointed endopod. 



1 genus. 



1. Gen. Sympodomma T. Stebbing 



1912 Sympodomma, T. Stebbing in: Ann. S. Afr. Mus., v. 10 p. 138. 



General form slender, elongate, width diminishing gradually from cara- 

 pace to pleon. Eyelobe narrowly linguiform, separating the pseudorostral 

 lobes, in which the sinus is well defined by the produced antero-lateral angle. 

 All five pedigerous segments dorsally exposed, the first short. Pleon elongate ; 

 telsonic segment produced between the bases of the uropods. First antenna 

 with both flagella slight. Third maxillipeds with second joint distally much 

 produced, fifth not distally widened. First three pairs of peraeopods in both 

 sexes with, fourth and fifth pairs without, exopods. 



4 species. 



Synopsis of species : 



j Crest of carapace without prominent teeth 1. S. weberi 



) Crest of carapace with prominent teeth — 2. 



j Crest of carapace with four prominent teeth 2. S. anomalum 



\ Crest of carapace with only three prominent teeth — 3. 



