42 Cumacea: 3. Bodotriidae, 6. Zygosiphon, 7. Iphinoe 



prominences. Carapace with sides more or less straight, which bulge to the 

 rear in ovigerous specimens; on each side a lozenge-shaped depression bounded 

 by ridges faint in Q and still more so in d: from the front corner of the 

 depression a ridge runs forward on to the side of the pseudorostrum; the 

 hind margin is obtusely raised. The last 3 pedigerous segments are much 

 lower than the 1^*^ and 2^^, and diminish much in width successively. The 



Fig. 19. 

 Z. mortenseni ( 2 ) Caiman, front. 



telsonic segment is well produced between the uropods and is not shorter 

 than the segment next preceding it. The eyelobe is broad, notched or emar- 

 ginate in front, with 2 separate masses of pigment but no distinct lenses 

 in Q. but deeply pigmented and with 9 corneal lenses in 6. Antenna 1, 



l^t joint as long as 2"<i and 3'^ combined, 3*^ twice 

 as long as 2^^. Mandible with 12 spines in spine- 

 row. Maxilla 1, palp with 2 apical filaments. 

 Maxilliped 1, epipod with very few branchial 

 leaflets in 9 , about 9 in d, exopod ending in 

 a cone of spirally coiled membrane capable of 

 being extended to a great length forward and out- 

 ward. Maxilliped 3, 2''^ joint bent, externally 

 p. 20 produced into a long pointed lobe, 4*^ joint also 



z. mortenseni 'S)"caiman, front, expanded extemallv into a very large curved 



lobe. Peraeopod 1. 2"^ joint in (5 about as long 

 as the rest combined, 'in 9 about two-thirds of their length. Peraeopod 2, 2"*i 

 joint a little less than the rest combined, 5^^ and 6*^ joints subequal, very short. 

 Uropods slender, length of exopod in 9 nearly, in c? a little over, three-fifths 

 that of peduncle, endopod three-fourths as long as exopod, 2"^ joint rather 

 over a third as long as l^S medial margin with 3 spines in 9, 6 in d. 

 L. 9 2-67, d 2-7 mm. 



(xulf of Siam, depth 9—19 m; Gulf of Manaar. 



7. Gen. Iphinoe Bate 



1856 Halia (Sp. un.: H. trispinosa) (non Risso 1826, MoUusca), Bate in: Ann, 

 nat. Hist., ser. 2 ??. 17 p. 458 | 1856 Venilia (Sp. un.: V. gracilis) (non Duponchel 1829, 

 Lepidoptera), Bate in: Ann. nat. Hist., ser. 2 t;. 17 p. 460 | 1856 Iphinoe (Sp. un.: I. 

 trispinosa), Bate in: Ann. nat. Hist., ser. 2 v. 18 p. 187 [ 1856 Cyrianassa (Sp. un.: C. 



