15 



DESCRIPTIOX OF A NEW SrECIES OF riTRINA, AND NEW 

 FORMS OF IIELICID.E, WITH A LIST OF THE HELICOID 

 SHELLS HITHERTO FOUND IN THE CANARY ISLANDS. 



By G. K. GuDE, F.Z.S., etc. 



Ecad 8fh November, 1895. 



The land-sliclls which Cohmcl G. S. Parry collected during his thii'd 

 visit to the Canary Islands (January to April, 1895), and several of 

 which he has kindly placed at my disposal, are interesting, not so much 

 on account of the new forms, since these, in view of the repeated and 

 thorough exploration of the group, could scarcely be expected to be 

 numerous, but chiefly because certain species were found in islands 

 where they had hitherto been looked for in vain, and also for the 

 discovery at San Sebastian, Gomera, of living specimens of Hygromia 

 multigrmiosa, a species previously known only in a subfossil condition. 

 An extended range for UeliecUa phalerata, which was believed to be 

 confined to Tcnerife, is established by the taking of specimens at 

 Gaidar, Grand Canary. Mousson recorded it for Palma, but the 

 correctness of that habitat has been doubted ; it is probable, however, 

 that the species had already been collected in Grand Canary by 

 Wollaston, for his variety wnhilicata from that island, regarded by 

 him as pertaining to H. persimilis, appears to Colonel Parry and 

 myself to be identical with S. phalerata. 



The new I'ecords referred to are : Vitrina Canariensis, Mouss., 

 Gomera (one specimen); Hynlinia cellaria, Miill., Palma; Ilelicella 

 compurcata, Drap., Palma; H. phalerata, W. and P., Grand Canary; 

 H. Despreauxii, D'Orb., Palma. The finding of Pyramidula scutula, 

 Shutt, in Tcnerife, is of interest, from the fact that Mousson and 

 Wollaston regarded it as a doubtful member of the fauna. 



Colonel Parry's shells included a Vitrina, which I describe as a new 

 species, and four varieties of Helicidte, which appear to be worthy of 

 distinctive names. 



YiTKiNA Pakryi, n.sp. 



Testa depressa, transverse oblonga, tenuis, corneo-virens, niti- 

 dissima ; spira plana ; sutura linearis, distincte marginata ; anfr. 3, 

 celeritcr accrescentes, ultimus ample dilatatus, superne valide gibboso- 

 canaliculatus ; apertura perobliqua ; peristoma simplex, acutum. 

 Diam. maj. 8, min. 5'5, alt. 3 mm. 



Hah. — Gaidar, Grand Canary. 



Its nearest ally appears to be V. Blauneri, from which it differs in 

 being smaller and in having pronounced gibbous grooves on the upper 

 side. Colonel Parry informs me that the animal is jet-black, while 

 in V. Blauneri it is pale-brown mottled with darker brown. 



Helicella TTJMijLOUTJM var. PULCHRA, u.var. 



Differt a typo, fasciis fuscis fere nigris ornata, subtus validius 

 costulata. Diam. maj. 13-5, min. 12, alt. 9 mm. 

 Hah. — Isleta, Grand Canary. 



