TURBOXILLA PUSTLLA. ')(>■) 



Turbonilla pusilla (Pliilippi). Plate XLIX, fig. 14. 



1844. Chemnitzia pusilla, Philippi, Euuiu. Moll. Sic, vol. ii, p. ■224, pi. xxviii, fig. 21. 



1859. CJiemtiitzia pmilla, G. B. Sowerbv. 111. lud. Brit. Shells, pi. xvi. tig. 3. 



1873. Turbonilla jJHsilla, Segueuza, Boll. R. Com. Geol. Ital., vol. iv, p. 354, uo. 313. 



1878. Turbonilla jpusilla, de Stefani e Pautinelli, Bull. Soc. inalac. Ital., p. 155. 



1878—84. Odosfomia (Turbonilla) pusilla, Moutevosiito, Eiuiin. e Siaoii. Couch. Medit. (Giorn. Soc. 



Sci. Nat. Palermo, vol. xiii, p. 93), 1878; Nomeu. Geu. e Spec. Couch. Medit., p. 92, 1884. 

 1883 — 98. Turbonilla pmilla, Bucquoy, Dautzeuberg et DoUfus, Moll. mar. Rouss., vol. i, p. ISl, 



pi. XX, fig. 16, 1883; v,d. ii, p. 812, 1898. 

 1890. Turbonilla pn^illa. Cams, Prod. Fauu. Medit., vol. ii, p. 283. 

 1892. Odostomiu pasilla, Praeger, Proc. Roy. Irish Acad. [3], vol. ii, p. 264. 

 1892. Turbonilla puailla, Sacco, Moll. Terr. Terz. Piem., pt. xi, p. 81. 

 1892. Turbonilla pusilla, Locard, Coq. mar. Cotes de Frauce, p. 140. 



1894—1900. Odostomia pusilla, Marshall, Jouru. of Couch., vol. vii, p. 384, 1894 ; vol. ix, p. 334, 1900. 

 1901. Turbonilla pusilla. Couch. Soc. List, Jouru. of Couch., vol. x, p. 20, uo. 456. 

 1906. Turbonilla pusilla, Kobelt, Icou. schaleut. europ. Meeresconch., vol. iii, p. 141, pi. Ixxiii, 



fig. 5 ; pi. Ixxiv, figs. 18 — 23. 

 1914. Turbonilla pusilla, Cerulli-Irelli, Palaeout. Ital., vol. xx, p. 269, pi. xxiii, figs. 36 — 40. 



Specific Characters. — Shell small, slender, fairly solid; whorls about 10, nearly 

 flat, varying considerably in width when compared with the total length ; orna- 

 mented by delicate closely-set costee, nearly vertical or but slightly oblique ; spire 

 elongate, subcylindrical, not strictly conical from base to summit, but compressed 

 as it approaches the apex, which is finely pointed ; mouth small, subovate, angulated 

 above, rounded below ; outer lip following the slope of the spire, not expanded. 



Dimensions. — 'L. 6 mm. B. 1 mm. 



Distribution. — Recent : Channel Islands, Torbay, Bxmouth ; West European, 

 Mediterranean. 



Fossil : Selsey. 



Pliocene : Siena, Monte Mario, Farnesina. 



Pleistocene : Messina, Taranto, Livorno, Valle Biaia. 



Remarks. — T. pusilla is unknown from the Anglo-Belgian Crag, but Mr. A. Bell 

 has obtained a specimen of it from Selsey, which is here figured. This seems to 

 correspond with the one given by Philippi except that the spire is considerably 

 longer, but as to this the present species is a variable form. The shells described 

 by Forbes and Hanley as Cheninitzla pusilla and Odostomia pusilla by Jeffreys 

 differ materially from Philippi's type. These writers appear to group T . pusilla 

 with Ghemnitzia lactea, C. elegantissima and C. gracilis, but this view I cannot 

 accept. As to bis specimens of T. pusilla, Jeffreys says the sides are always 

 curved, but in Philippi's shell, and in mine, which has been identified by M. 

 Dautzeuberg, they are straight or nearly so. The most distinctive feature of the 

 latter seems to be the compressed aiid not strictly conical form of the upper 

 portion of the spire. My specimen from Selsey measures 6 ram. in length ; 

 Philippi's is 4 mm. 



