General Catalogue of South African Crustacea. 417 



with quadridentate cutting edge, tridentate accessory plate, thirteen 

 spines, and strong molar ; the other with tridentate narrowly curved 

 cutting plate, ten spines, and strong molar. The pectination of the 

 spines differs on the two mandibles. The branchial apparatus of the 

 first maxillipeds, so far as I could make out, has no digitiform or 

 leaf-like gill elements. The fringe of spines on the antepenultimate 

 joint of the endopod is remarkable for the breadth of the pectinate 

 ends of four out of the six spines. The third maxillipeds at the 

 dilated distal end of the long second joint have a set of unequal 

 teeth at the apex of the inner margin and several sparsely plumose 

 setae at the somewhat produced apex of the sinuous outer margin ; 

 the third joint, instead of being as is usual rather small, is here at 

 its base about as broad as the distal margin of the second joint, and 

 its broadly rounded summit reaches the base of the sixth joint, thus 

 constituting a feature not hitherto described for any species ; the 

 short fourth joint is attached in a sinus of the inner margin of the 

 third, much nearer its base than its apex ; the three remaining joints 

 are narrow, much longer than broad. 



The first peraeopods are between two and three times as long as 

 the second, which are only subequal in length to the fifth pair, 

 though with a much larger basal joint, and an exopod not much 

 smaller than that of the first pair. In the third and-fourth peraeo- 

 pods, the exopods do not reach the end of the basal joint ; they are 

 devoid of setae and have only two minute apical setules. As the 

 second antennae seem to be incompletely developed, the same may 

 be the case with these exopods. In a very small specimen only 

 rudiments of them could be with difficulty discerned. 



The uropods, apart from their apical spines, are little longer than 

 the telson ; the peduncle is more than half as long as the telson. 

 The outer ramus has on the outer margin of its second joint four 

 spines with bifid apices, four small spines on its inner margin, two 

 unequal spines on its apex, one of them elongate ; the inner ramus 

 has on its inner margin four spines to the first joint, three to the 

 second, and three to the third followed by a long apical spine, which 

 is not so long as the longer of the apical couple on the outer ramus. 



Length of the specimen here described, in slightly bent position, 

 5 mm. A specimen 2'75 mm. long was devoid of the fifth peraeopods. 



Locality, lat. 32 53' 30" S., long. 28 11' 00" E., from depth of 

 75 m. No. 83, obtained by Dr. Gilchrist. 



The specific name is given out of respect to Dr. \V. T. Caiman, 

 who has made so many valuable contributions to our knowledge of 

 this group. 



