96 land and fresh-water shells of n. a. [part u. 



Spurious Species of Physa. 



Physa amjtuUaria, Say, is mentioned by name only by Lea in Expl. of 

 Nebraska, &c., House Doc. 2d Sess. 35tli Cong. 1858-9, vol. II, jit. 

 iii, p. 724. It may be a misprint for ancillaria. 

 Phi/s'i riralis is catalogued without description by J. de C. Sowekby (in 



Richardson's Fauna Boreali-Ameri^na, III, 315 (1830)), as is also 

 Physa turrita with Physa elongata, Say, and Bulla hi/puorum, LiSN. as 



synonyms. 

 Physa scularis, Jay. — The shell is white, semi-transparent, and very 

 fragile ; the sutures of the whirls are very angular, and of the same 

 character with the Ampullaria scaluris, D'Orb. It was 

 presented to me by Count Castelneau, whose researches 

 in this country will, without doubt, add much interest- 

 ing matter to our knowledge of natural history. 

 Ilab. Everglades of Florida. (Jay.) 

 Paludina scalaris, Jay, Cat. ed. 3d, 1839, p. 112, pi. 



i, f. 8, 9.— Reeve, Con. Icon. fig. (1863). 

 Physa scalaris, Haldeman, Mon. 34, pi. iv, f. 9 (1842). 

 The original description and figure are given above. 

 This species is undoubtedly distinct from any other known, but its 

 generic place is doubtful. It does not seem to belong in Physa or Palu- 

 dina. Specimens from Tampa Bay have been received by Mr. Anthony. 

 There is a Physa scalaris, Dunker. 



Physa planorbula, DeKay, see Planorbis trivolvis. ^^ 



Physa marginata, Say, is mentioned by Bell in th^Canadian Geological 



Report for 1858, p. 252. I know of no such species. 

 Physa frarjilis, DeKay, N. Y. Moll. Rep. 1S39, 32, is mentioned by name 



only as a new species. 

 Physa fontinalis, Sheppakd (Tr. Lit. and Hist. Soc. Quebec, 1, 195, 1829). 

 — Reversed, oval, transparent, smooth, horn-colored ; spire short, 

 subacute. (Near Quebec.) (Sheppard.) J. de C. Sowekby also 

 quotes P. fontinalis without description, from Methy Lake to Bear 

 Lake, in Richardson's Fauna Boreali-Americana, III, 315 ; also by 

 G. B. Sowekby in Tankerville Cat. p. 42 (1825) ; by Michaud in 

 Mag. de Zool. 1837, cl. v, p. 4, and 

 Physa suhopaca, Sheppakd (Tr. Lit. and Hist. Soc. Quebec, 1, 195, 1829). 

 — Shell reverse, oval, semi-pellucid, grayish-yellow ; spire short, 

 acute. This species is rather more common than the foregoing (P. 

 fontinalis) ; they are often found together at the Island ; it resembles 

 fontinalis, but is not so transparent. It is yellow without and white 

 within. (Shcppard.) 



Fossil Species of Physa. 



Dr. Meek gives me the names of the following fossil species : — 

 Physa secalina, Evans & Shumard, Pr. Phil. Ac. 1854, 156. 

 Phijsa rhomboidea, Meek k Hayden, Pr. Phil. Ac. 1856, 119. 



