(453 ) 



6. South African Crustacea (Part XI of S.A. Crustacea, for the 

 Marine Investigations of South Africa). By the Rev. THOMAS 

 R. R. STEBBING, M.A., F.R.S., F.L.S., F.Z.S., Fellow of King's 

 College, London, Hon. Memb. of New Zealand Inst., Hon. Fellow 

 of Worcester College, Oxford. 



(Plates XIII-XX of Vol. XVIII. Plates CVI1I-CXV of Crustacea.) 



THE fourteen species here considered ai - e distributed over nine 

 families. Six of the species are regarded as new, one of them seeming 

 to require a new genus. The details supplied in the plates for Eucrate 

 affinis, Haswell, and Penaeus longicornis (Olivier) may claim to be of 

 scientific interest, although the specific names have been previously 

 published. In the case of Olivier's species the name is a revival. 

 Also under the heading of the genus Ebalia opportunity has been 

 taken for rectifying some ancient misstatements in nomenclature. 

 The name of the new genus Maxillotlirix asks attention to the equip- 

 ment of the vibratory lamina of the second maxilla, which often passes 

 unnoticed, probably for two reasons, one being its usual uniformity, 

 the other the difficulty of obtaining it undamaged in the manipulation 

 of small Malacosti'aca. 



BRACHYURA. 



TKIBE OXYRRHYNCHA. 

 FAMILY INACHIDAE. 



GEN. ACHAEOPSIS, Stimpson. 



1857. Achaeopsis, Stimpson, Pr. Ac. Sci. Philad., vol. 9, p. 219. 



1910. and DoryncJnts, Stebbiug, Ann. S. Afr. Mus., vol. 6, 



p. 285. 



ACHAEOPSIS SPINULOSUS, Stimpsou, 1857. 



(See these Annals, vol. 6, p. 285, and add 



1911. Achaeopsis sirinulosus, Rathbun, Tr. Linn. Soc. London, ser. 2, 



vol. 14, p. 247.) 

 29 



