192 Mr. 0. Thomas on 



brought over in the same manner as Planorhis dilatatus and 

 Physa heterostropha. 



P. Brotonii, Petterd, from Tasmania, more closely resem- 

 bles this species than any other with which 1 am acquainted, 

 and it is curious that the other species of Paludestrina 

 (P. Jenkinsi), added of recent years to the British fauna, 

 should also have an extremely close Tasmanian representative 

 in P. Legrandiana of Brazier. 



The present species may be thus described : — 



Paludestrina Taylori. 



Animal with the foot pale beneath, oblong, rounded behind, 

 somewiiat auriculate anteriorly, with tlie front edge straightish 

 or even slightly sinuated. Proboscis cleft beneath in front, 

 blackish above and at the sides, pale at the end ; body also 

 blackish at the upper part of the sides. Tentacles moderately 

 long, scarcely tapering, rather obtuse at the tips, semitrans- 

 parent, with a dark streak on one or both sides; eyes coal- 

 black, large, slightly prominent at outer base of tentacles, 

 with a sulphur-coloured spot above each. 



Shell subcylindrical, turreted, umbilicated, brownish or 

 olive horn -colour, obscured by a blackish earthy deposit ; 

 whorls four in number, very convex, separated by a deep 

 suture, clean specimens exhibiting tine lines of growtii ; aper- 

 ture broadly ovate, a little narrowed above ; peristome con- 

 tinuous, outer margin simple, columellar edge slightly 

 thickened and faintly reflexed. 



Length 2^-3 millim., diam. 1^. 

 - Operculum paucispiral, thin, horny, slightly concave 

 exteriorly. 



The sulphur spots above the eyes are a very striking feature 

 in this mollusc, and under the microscope have a granular 

 and even almost luminous aspect. Tiie small size, besides 

 the other characters mentioned, readily distinguish this from 

 the other British species. I have much pleasure in associating 

 with this form the name of its discoverer. 



XXIV. — New South. American Sciuri, Heteromys, Cavia, 

 and Caluromys. By Oldfield Thomas. 



Sciurus griseogena meridensis, subsp. n. 



Precisely similar in size and general colour to the typical 

 form, but the fur very much longer (hairs of back about 



