Cumacea: 3. Bodotriidae, 4. Cyclaspis 



37 



marking the greatest breadth of the carapace; on the last third of the length 

 a medio-dorsal pair of carinae extend to the hind margin. Pedigerous segment 

 1 is dorsally exposed, though overhung by the carapace, the 4*"^ and 5*^^ 

 have well marked dorso-lateral carinae, which are also found on the first 5 





Fig. 15. 

 C. cingulata (5) Caiman. 



pleon segments; a median keel extends from the 5^^ pedigerous to the'jS*^ 



pleon segment, but is feeble at beginning and end of the series. Eyelobe 



with 11 corneal lenses on the distal end. Antenna 1 



with 3^ joint longer than 2"*^, accessory flagellum 



minute but distinct. Maxilliped 3, 2^^ joint with 



distal process reaching nearly as far as that of the 



4**^ joint, its length without this long process little 



more than the rest of limb. Peraeopod 1, 2^"^ joint 



feebly produced at apex, length less than rest of limb, 



5^^ and 7^^ joints equal, each a little shorter than 6*^. 



Peduncle of uropods longer than the exopod but slightly 



shorter than the endopod, which has 3 small spines 



about tbe middle of the medial margin, the apex bare, 



acute. L. 4'2 mm. 



d. Carapace with only a faint trace of the 

 encircling collar, and without the hinder pair of dorsal 

 carinae; infero-laterally a faint horizontal ridge meets 

 the collar anteriorly. Dorso-lateral keels on last 2 

 pedigerous segments, but the stout pleon segments 

 have no distinct keels. Terminal joints of peraeopod 1 

 longer and more slender than in 9 . 



Gulf of Siam; depth 9 — -18 mm. 



19. C. thomsoni Calm. 1907 C.t., Caiman in: Tr. zool. Soc. Londou, r. I81 

 p. 7, 14 t. 5 f. 12— 16. 



Near to C. levis (nr. 8). Pseudorostral lobes short, with eyelobe 

 reaching to or beyond their apices; antero-lateral tooth minute. Carapace 

 pitted, rugose, with dorsal carina flattened or faintly doubled to the rear; 

 on either side behind the middle a short groove is limited by a faint ridge 

 running obliquely downwards; a slight short ridge runs backward from the 

 antero-lateral corners. Pedigerous segment 1 exposed at the sides in Q , 

 not in (S, 2"'^ with dorsal carina, 3^ to 5*^ with lateral carinae. Pleon 

 segments with dorsal and lateral carinae and articular processes in 9 , the 

 lateral carinae wanting in 6 . Eyelobe apparently short, occupied by several 

 corneal lenses. Peraeopod 1, 2"*^ joint not distally produced but carrying 2 



C. cingulata Caiman, 

 maxilliped 3. 



