38 Annals of the South African Museum, 



Although a length of not more than 2 inches might be 

 expected to distinguish our specimens from those which Dr. 

 Willey collected in New Britain, exceeding a length of 

 5 inches, yet in most other respects the South African 

 examples show very exact agreement with Borradaile's 

 description and figures of his species. The upturned rostrum 

 is a striking feature, being about twice the length of the trunk 

 of the carapace in the medio-dorsal line, armed above and 

 below with teeth, those at the base above being for the most 

 part longer and further apart than those towards the free end. 

 But Borradaile both in his sub-generic definition and in his 

 description of this species speaks of movable spines, which 

 cannot be reconciled either with his figure or with our 

 specimens. It may be noticed indeed that Alcock omits the 

 character from the definition of Parapandalus as restricted, 

 and in describing Pandalus (Parapandalus} spinipes (Bate) 

 expressly states that the serrations of the rostrum in that 

 species are comb-like and fixed, while to Plesionika he 

 assigns a "rostrum armed dorsally with fixed teeth and 

 sometimes with movable teeth also." The figures of the 

 mouth organs in Borradaile's plate are all characteristic of 

 those in the South African specimens, except that in the 

 cutting plate of the mandible each external tooth of the 

 five is larger than any of the three intermediate teeth. The 

 other member of the pair of mandibles differs a little from 

 its fellow in having six teeth. The second maxilliped has the 

 very short broad seventh joint more distinct than might be 

 expected from the figure. The first peraeopods have on the 

 distal part of the fifth joint and the proximal part of the sixth 

 several transverse rows of short spines or stiff setules, which 

 may perhaps be of use for cleansing the long flagella of the 

 two pairs of antennae. The second pair of peraeopods with 

 their small setose chela and many-jointed wrist are equal. 

 The narrow end of the telson carries a short spine flanked by 

 two long ones. 



Locality. Cape Natal, W. by N. f N. 11 miles (Natal); 

 depth 185 fathoms. A 1272. 



GEN. HETEEOCAEPUS, A. Milne-Edwards. 



1881. Heterocarpus, A. Milne-Edwards, .Ann. Sci. Nat., Ser. 6, vol. 11, 



art. 4, p. 8. 



