134 LITTORINIDiE. 



Pliilippi represents the animal as having a prominent 

 emargiuated muzzle, flanked by two obtuse somewhat 

 triangular tentacles, with eyes on the external bases, and 

 not on bulgings at the sides of their bases ; the foot very 

 short and rounded at the ends ; the colour whitish. Such 

 an animal certainly is much more nearly allied to Trunca- 

 tella than to Rissoa. In the same volume of Wiegmauu"'s 

 Archiv. (vol. vii. pt. 1, 1841) Dr. Louis PfeifFer constitutes 

 his genus Paludindla. (T. minuta, ovata vel depressa ; 

 apertura ovata ; peristoma simplex, subcontinuum ; oper- 

 culum spiratum) for Phili])j)i's shell, and not for the 

 Rissof£ of the ulceE group, as the name has been cited 

 usually. 



H. ANATiNA, Draparnaud. 



Abbreviated ovate-conic, thin, smooth, of an uniform pale olive 

 colour. 13ody at least equal to the spire ; whorls ventiicose, 

 shouldered above. Suture profound. Mouth very large : pillar- 

 lip narrow, reflected, flanked by an umbilicus. 



Plate LX XX VII. fig. 3,4. 



Cydosloma anatinum, Drap. Moll. Terr, et Fluv. France, p. 37, pi. 1, f. 24, 25 



(probably) . 

 Paliulina anuti7ia, Michatd, Compl. a Drap. Moll. France, p. 100 (from last). 



• — Alder, Magaz. Zool. and Bot. vol. ii. p. 1 1 6. — 



PoTiEZ and Mich. Galcrie Douai, Moll. vol. i. p. lO'O. 



— Desh. Lam. Anim. s. Vert. (ed. Desh.) vol. viii. 



p. 521 ?— Gras, Moll. Fluv. et Terr. Isere, App. p. 20. 

 LittoriiM „ Gray, Manual Land and F. W. Shells, p. 87. — Brit. Marine 

 Conch, p. 258. 



Neither the figure nor the description in Draparnaud's 

 work positively demonstrates the identity of this British 

 shell with the anatinum of that writer ; the present shell, 

 however, is generally accepted as the anatinum of authors ; 

 and the little discrepancies probably result from the rude- 



