22 Some Crustacea of Natal 



third large, exceeding the finger's slender apex. The fourth and fifth 

 perseopods resemble the third in all essential characters. 



In the account of H. marleyi I overlooked its agreement with H. 

 kilkenthali (de Man) in having no spine or denticle at the antero- 

 lateral angle of the carapace, and in the " fingers of the first perceopods, 

 when closed, meeting throughout their length" (Kemp), but it differs 

 by the relative shortness of the wrist in the first peroeopods, the 

 spinulation of the last three perseopods, and the absence of the two 

 pairs of apical spines from the telson. 



Genus ALOPE, White, 1847. 



Alope australis, Baker. (Text-fig. 5). 



For the genus and species see these Annals, vol. ii, pt. 3, p. 121, pi. 

 xix, 1919. 



Mr. Kemp (Rec. Ind. Mus., vol. x, pp. 83, 89; 1914), notes that in 

 this species "the incisor process of the mandible is obsolete," whereas 

 in A. palpalis, White, the t}^pe species, this process is present, though 

 considerably reduced. A specimen from Durban, obtained by Mr. 

 Boyce, has enabled me in the text-figure to show some details of the 



Text-fig. 5. 



Alope australis, Baker. 



Apex of mandible. 



mandible of A. australis. In these the quinquedentate plate seems to 

 represent an incisor process, though its position makes it part of the 

 molar. The specimen was 28 mm. long, of which the carapace 

 accounted for 10 mm. 



In Acanthephyra brachytelsonis, Bate, I have shown how the broad 

 dentate incisor process is actually attached to the molar. See Ann. 

 S. Afr. Mus., vol. xv, p. 97, 1915, and vol. xvii, pi. 94. 



