668 



PROCEEDINGS OF THE ACADEMY OF 



[Dec, 



PUPOIDES MARGINATUS Say. 



Bifidaria rupicola Say. 



BlFIDARIA P. HORDEACELLA Pils. 



Somerset: 

 Helicella ventricosa Drap. 



EULOTA SIMILARIS Fer. 



Polygyra plana Dkr. 

 Thysanophora selenina Gld. 

 Bifidaria servilis Gld. 

 Bifidaria p. hordeacella Pils. 

 Bifidaria rupicola Say. 



PtUMINA DECOLLATA L. 



Zonitoides minuscula Binn. 



SUCCINEA BERMUDENSIS Pfr. 



Helicina convexa Pfr. 



CARYCHIUM BERMUDENSIS Gill. 



PCECILOZONITES BERMUDENSIS Pfr. 

 PCECILOZONITES CIRCUMFIRMATUS 



Redf. 

 Zonitoides minuscula" Binn. 

 Agriolimax l.evis Mull. 

 Milan sowerbyi Fer. var. 



SUCCINEA BERMUDENSIS Pfr. 



fcO 



Descriptions of New Species. 



Physa caliban n. sp. Fig l. 



Shell imperforate; elongate, oval; thin; light chestnut-brown; 



apex dark red, acute, smooth under a lens; suture impressed, marked 



by a white line with a dark red line at the lower 

 edge; spire conical, composed of 5 slightly 

 convex whorls; sculptured with irregular growth 

 lines which form slight crenulation at the 

 suture, but no microscopic spiral lines on the 

 shells examined. Aperture irregularly oval, 

 acute above and evenly rounded at base, outer 

 lip thin and arcuate, columella dark red, rather 

 thick, with a thin callus spreading out over the 

 parietal wall. In alcoholic specimen the mantle 

 has 3 digitations at posterior angle and 5 at the 



columella. The central tooth of the radula has 5 cusps and the 



lateral have 8 subequal cusps, the sickle-shaped marginal fig. 1 has 8 



nearly equal cusps. 



Alt. 10.5, diam. 5.25 mm. 



Locality. — Pembroke Marsh, at Hamilton, Bermuda. Very plentiful. 



This species differs from P. pomilia Conr. by its darker color, dark 



red columella and rougher surface; and from P. eubensis Pfr. by the 



lack of the white fold on the columella, higher spire and darker color. 



Type No. 100,334, The Acad. Nat. Sci. Phila. 



Planorbis uliginosus n. sp. Fig. 2. 



Shell perspective umbilicate ; lenticular ; moderately thick ; grayish- 



Fig. 1. — P. caliban n.sp. 



