26 JOURNAL OF CONCHOLOGY. 



NOTES ON THE PARMACELLA OF GIBRALTAR. 



By T. D. a. COCKERELL. M.C.S. 



Mr, Ponsonby has kindly sent me three individuals of 

 Parmacella (in spirit) which he collected at Gibraltar, and from 

 the examination of these I am able to offer a few remarks 

 which may tend to throw light on their identity. It has been 

 catalogued under the following names : — 



Parmacella calyculata Sby? Kobelt, ' Journ. Conch.', 

 1883. 



P. valenciennii Webb and Vanbeneden. Hesse, Pon- 

 sonby, and Crosse, ' Journ. de Conch.,' 1884, and 

 Jahrb. Mai. Ges. 



P. deshayesii Moq.-Tand. Darbishire, 'Journ. Conch., 

 1885. 



External Appearance. — Moquin figures P. valenciennii 

 as clear reddish, without markings, and Webb and Van- 

 beneden's figure ('Mag. de Zool.,' 1836, pi. 76) is of the same 

 colour. Hidalgo (' Moll. Terrest. de Espana,' vol. ii., pi. i) 

 figures it as red-brown, but with several small black spots on the 

 fore part of the mantle. Locard ('Moll, de France,' p. 17) 

 calls Moquin's species P. moquini Bourguignat, and considers it 

 distinct from P. valenciennii Webb and Vanbeneden. The 

 three Gibraltar examples all differ from the above, two of them 

 in having the ground-colour a very dark brownish-green, and all 

 of them in their markings. The two dark specimens have 

 small spots and a little dark marbling on the anterior part of 

 the mantle and also two dark bands on the posterior half, 

 placed one on each side in such a position as to nearly form a 

 dark V on the mantle, with the apex pointing towards the tail. 

 They do not join in the median line, however, and so the lower 

 portion of the V is wanting. The third example is brownish, 

 and differs only from Hidalgo's figure in the presence of the 

 V-shaped mark above described. 



J.C, v;, January, 1886. 



