104 Mr. T. D. A. Cockerell's Notes on Slugs. 



in the mantle; but a second specimen, only 12^millim. long, 

 shows the pale apex of the shell. 



Described from two specimens in the British Museum 

 marked " Ceylon, 25 May, 1857." 



I do not at all doubt that Mariaella is a good genus ; but 

 the forms from the Seychelles (Dussumieri, Val.), from 

 Ceylon (Thivaitesi, Humb.), and from South India (Beddomei, 

 G.-A.) are so exceedingly allied that they can scarcely be 

 regarded as distinct species. Very possibly the Seychelles 

 form may have been imported from India or Ceylon. We 

 thus arrive at this arrangement : — 



Mariaella, Gray. 



Mariaella Dussumieri, Val. MS., Gray. Seychelles Islands. 



Subsp. M. Thwaitesii (Humb.). Ceylon. 



Subsp. M. Beddomei (Gr.- Aust.). Travan core Hills, India. 



Var. nigra (G.-Aust.). S. India. 



Var. maculosa (G.-Aust.). S. India. 



For the best account of the genus see Dekhania in Godwin- 

 Austen's ' Land and Freshwater Mollusca of India,' part vi. 

 Sept. 1887, and pi. lviii. 



Limax infumatus, Fer., is apparently also to be included 

 in Mariaella. It resembles M. Beddomei, var. nigra. 



Girasia, Gray. 



Girasia, Gray, Cat. Pulm. 1855, p. 61. 



Pormarion, Fischer, Act. Soc. Linn. Bordeaux, 1856. 



There can be no doubt that Girasia ought to stand in 

 preference to Fischer's name Parmarion. Girasia is described 

 in a British Museum Catalogue dated 29th March, 1855, and 

 Mr. Saunders of the British Museum library informs me that 

 this is really the date of publication. Parmarion is described 

 in a paper dated June 1855, which appears in a part dated 

 March 1856. 



Girasia was practically founded on G. Hoolceri, a well- 

 known species of which the type still exists. Parmarion 

 included four species, infumatus, extraneus, rangianus, and 

 prohlematicus, all of Ferussac. P. infumatus seems to be a 

 Mariaella, P. extraneus is a Girasia, P. prohlematicus may be 

 an Ibycus, while rangianus does not seem to belong here at all. 



