166 Annals of the South African Museum. 



flagellum is indistinctly four- to five- jointed, and accompanied by 

 three long filaments ; the accessory is minute, perhaps two-jointed. 

 The second antennae have the penultimate joint of the peduncle 

 more than half as long as the following joint ; both have ample 

 brushes of setae; the flagellum, if complete, is not extremely long. 

 The mandibles have a narrow cutting edge, supplemented in one 

 member by a narrow accessory plate, four to five spines in the 

 spine-row, and a moderately strong molar. 



The maxillae were not clearly deciphered, but appear to be 

 normal. 



The first maxillipeds show some seven branchial leaflets on the 

 epipod ; they have a broad antepenultimate joint fringed with 

 pectinate spines, and the last joint very slender, not stumpy or 

 elliptical as in certain species of Cnunila and Nannastacus. The 

 second maxillipeds have the third joint distinct, the three following 

 joints broad, not elongate, the seventh very small. In the third 

 maxillipeds the second joint is broad, rather longer than the follow- 

 ing joints combined, carrying long plumose setae on the free outer 

 (not produced) part of its apical border, the third joint is missing, 

 the fourth has long plumose setae on the distal part of its outer 

 margin, the fifth is wider but a little shorter than the curved apical 

 sixth, the seventh is slender, subequal in length to the fourth ; the 

 exopod is of moderate size. 



In the first peraeopods the second joint is shorter than the follow- 



iag joints combined, distally narrowed, the third joint is longer than 



broad, the fourth distally widened, half as long as the fifth, which is 



about three-fourths of the sixth ; the slender seventh in length equals 



the fourth ; the exopod is larger than that of the third maxillipeds ; 



the following exopods successively diminish in size. The second 



peneopods have a second joint rather shorter than the following 



joints combined, little more than twice as long as its greatest 



brea.dth, its edges somewhat denticulate ; the third joint is nearly if 



not quite obsolete, the fourth little longer than broad, the fifth twice 



and a half as long as the sixth but scarcely longer than the seventh. 



The third and fourth peraeopods have the second joint narrowly 



piriform, the narrow end distal, the third joint well developed, the 



fourth short, the fifth longer than the sixth, the seventh very small, 



with a long unguis or curved spine. In the third peraeopod the 



second joint is longer but the fifth shorter than in the fourth pair. 



The fifth peraeopods are very slight in structure, the second joint 



longer than the rest combined, the seventh joint shorter than the 



third, the fifth a little longer than either the fourth or sixth. 



