On a neto Species of Slug from South Africa. 405 



Tizard Bank, 5 fathoms {IfJI.S. 'Rambler'') ; Macclesfield 

 Bank, 13 fathoms {II.M.S. 'Penguin). 



Madrepora violacea. 



Corallum cespitose or subcorymbose from an incrusting 

 base. Branches short, stout, and much divided, somewhat 

 angular near the base ; main divisions 2'5 to 3*5 centim. 

 long, over 1 centim. diameter at a point 1 centim. below the 

 apex. Axial corallites 25 to 8*5 millim. diameter, usually 

 1*5 millim. exsert, subconical, with a rounded margin. 

 Lateral corallites chiefly stout, spreading, tubular, with smaller 

 tubular, nariform, or subimmersed ones between ; stout coral- 

 lites sometimes in subregular rows, diameter 2 to 2*5 millim., 

 length 2 to 4 millim., inner part of the wall often a little 

 shorter than the outer, margin distinctly rounded ; the longer 

 ones bear buds. Wall dense and thick, Star moderately 

 developed in stout corallites, but scarcely recognizable else- 

 where. 



Fiji [Rayner) ] Great Barrier ~RQt{ (^Saville-Kent) ] Mac- 

 clesfield Bank, 7 to 8 and 13 fathoms [H.M.S. '■Penguin '). 



LVII. — Description of a neio Species of Slug from South 

 Africa. By Edgar A. Smith'. 



The British Museum has recently received from Mr. J. H. 

 Ponsonby a very remarkable slug which was collected near 

 Pietermaritzburg (Natal) by Mr. H. Burnup. 



It belongs to the genus Apera *, of which only a single 

 species has as yet been described. This group originally 

 bore the name of Chlamydephorus f ; but as that term had 

 previously been employed in Mammalia \^ that suggested by 

 lieynemann may be conveniently substituted. Ileynemann, 

 however, does not appear to have been aware that Agassiz 

 had used the name Cklamydophorus ^ which is practically the 

 same as Binney's Chlamydephorus^ but abolished Binney's 

 name on the ground that it indicated a false characteristic, 

 namely the presence of a mantle. On the contrary, Ileyuc- 

 niann considered that the pallium was entirely wanting or 

 concealed, and hence he proposed the term Apera. 



* Ileynemanu, Jalirb. deutsch. Mai. Gesell. 1885, p, 20, 



t Biauey, JJull. Mus. Comp. Zool. Harvard, vol, v, (1879), p. 331. 



X Agassiz, Nomen. Zool. Mammal, p. 8 (1842). 



Ann. ik Mag. N. Hist. Ser. 6. Vol. x. 32 



