148 " ENDEAVOUR " SCIENTIFIC RESULTS. 



well marked, also the short curved groove either side of 

 the cardiac region arid the median groove on the frontal 

 region. Three frontal teeth of similar shape, acute, median 

 tooth much depressed and little visible in dorsal view. 

 Three orbital, sub-spiniforrn teeth, one inner, suborbital, 

 two supraorbital, the outer of which is separated by a 

 fissure from a small suborbital lobe. Antero-lateral margin 

 leading to the orbit and not to the buccal cavity, armed 

 with four spiniform teeth, of which the first two are 

 largest and subequal, and the last one smallest. A slightly 

 projecting tooth behind the notch at the cervical suture. 



The basal segment of the antenna bears a flat, inward- 

 pointing spine at its antero-internal angle. At either end 

 of the epistome there is a small, sharp spine, while the 

 neighbouring angle of the buccal cavity is spiniform. On 

 the same margin where the outer angle of the maxilliped 

 fits, there is a tubercle. When the maxillipeds are in place 

 a subtriangular opening remains, leading to the efferent 

 branchial channel. 



Merus of chelipeds unarmed; carpus with three distal 

 prominences; a spine on proximal half of upper margin 

 of right palm, two pointed tubercles on left palm, a 

 tubercle at articulation with dactylus. Fingers gaping 

 when closed. Carpus of first and second walking legs with 

 a small tubercle at the distal end just below upper margin. 

 These legs are shorter than the cheliped; last leg much 

 longer than the preceding but shorter than the second 

 ambulatory. On the propodus of the first prehensile leg 

 there are two long spines opposing the dactylus (which 

 flexes between them) and tw r o small spines on the posterior 

 surface near the base of the dactylus. On the propodus 

 of the last leg are likewise two small spines, but only one 

 large spine forming a chela with the dactyl; furthermore, 

 on the outer edge of the dactyl itself there is a spine, which 

 is contrary to Borradaile's definition of the genus. This 

 spine is present on the left leg but has been broken off 

 the right leg. In the immature specimen they are well 

 developed on both sides. 



The sternal sulci meet opposite the first pair of walking 

 legs. In the immature female their extremities are further 

 apart and do not reach beyond the line of the walking legs 

 of the second pair. 



