41 



closing down on a short, convex, transverse palmar margin of 

 the sixth joint ; this, w^hich is about twice as long as broad, is 

 except near the base immersed in very long setae, one group 

 near the convex hind margin being exceptionally dense. 



The branchiae are composed of leaflets so narrow that they 

 may be regarded as something intermediate between phyllo- 

 branchiae and trichobranchiae. 



The first pleopods have an S-shaped appearance, with 

 many outstanding setae, the ramus about twice the length of 

 the peduncle, a narrow membranous strip, with a widening 

 at the bend (as seen without dissection). The second 

 pleopods are biramous, both rami short, narrow, membranous, 

 the outer seemingly the shorter. The three following pairs 

 have broad rami, the outer the broader, with the outer and 

 apical margin bordered with long feathered setae that look 

 as if composed of numerous joints like an antennary 

 flagellum ; the inner ramus is narrower at the apex with 

 similar but fewer setae. 



The uropods extend beyond the telson, the outer ramus 

 the larger, with the inner and upper margins straight and 

 smooth, the outer and apical convex, densely fringed with 

 long plumose setae, of which an additional curved series 

 extends from the upper outer corner on the surface to near 

 the centre of the ramus ; the inner ramus is approximately 

 oval, with long setae at the apex and on the lower part of the 

 inner margin. 



The telson is broader than long, with a small group of 

 of setae near each corner of the nearly straight apical margin, 

 the lateral margins sinuous, making the telson narrowest at 

 the base and broadest at the middle. 



In spirit the colour is a sort of ivory white. 



The length of the largest specimen from rostrum to end of 

 telson was 47 mm. 



Habitat, Cape of Good Hope, Gordon's Bay, a little below 

 high water mark. 



Alphonse Milne-Edwards in his revision of the genus in 

 1870, divides the 17 species then known into two groups, the 

 second distinguished by a short telson and comprising 7 

 species. Of these, 4 have a tridentate front, and of the 

 remaining three which are devoid of latero-frontal teeth, one 

 has the rostrum itself tridentate. There thus remain only 

 two for comparison with the present species, namely, 

 C. Bocourti, A. Milne-Edwards, which is distinguished by 

 the strong rostral point, and C. mucronaia, Strahl, in which 

 the third joint of the first antennae is not elongate. Of 

 species established since the above-mentioned revision, 

 C. mauritiana, Miers, has the trunk of the sixth joint in the 

 larger cheliped much larger than the fifth joint, as is also the 



