156 M. o. A. L. morch's review of the vermetid.e. [April 9, 



On Haliotis tubereulata, probably from Morocco. Operculum 

 unknown. 



Deeply burrowing, about half of the shell being concealed. 



Vermetus annulatus*, Rousseau, Chenu's Illustr. pi. 2. f. 2 (the 

 smaller figure) looks very like this shell ; but it is a gregarious, not 

 burrowing species. S. teredula is perhaps most allied to iS. mega- 

 mastus, Morch. 



9. SiPHONiuM (Dendropoma ?) afrtjm, Gm. 

 Le Datin, Adanson, Senegal, p. 1 65. pi. 1 1 . f. 4. 

 Sei'jmla afra, Gm. S. N. p. 3745, no. 23. 



T. soUdissima, albida, corrodens, lituiformis, versus aperhiram 

 tenumscula, anfr. anti(ivati, iitrinque obtuse angulati, superne 

 planmsculi, litis longitudinalibus alternatim minoribus obso- 

 letis ; sulci incrementi profundi irregulares, stria: incrementi 

 confertcB ai-cuatce, inferne lateraliter reductce ; apertura cir- 

 cularis vel subquadrangularis. 

 Diani. aperturae circ. 3\ m. Operculum ignotum. 

 Hab. Gaboon, Western Africa, on Chama se/iegalensis,^.; two spe- 

 cimens. Closely allied to the preceding, but differs in being very 

 thick ; the whorls are nearly regularly quadrangular ; the striae of 

 growth are very prominent, "except in the last whorl. According to 

 Adanson, the lid is only one- sixth of a line in diameter ; it is therefore 

 doubtful if it belongs to this genus. 



10. SiPHONiUM (Stoa) POLiTtTM (Daudin). 

 Spiroglyphus j)olitus, Daudin, Recueil, 1801, p. 49. 



" S. irregulariter spiralis, politus, apertura rotunda.'" 

 " Diam. de 3 lignes an plus. Tube blanc, poli, roule' en deux 

 tours de spirale irreguliere, et plus gros a son ouverture, qui est 

 cylindrique. II se creuse un lit et s'attache sur diverses coquillages 

 bivalves de I'lnde, du genre des jambonneaux et des peignes." The 

 expression, "plus gros a son ouverture," and the above measurement, 

 lead me to consider this species as identical with Stoa perforans of 

 De Serres. 



a. Stoa perforans, M. de Serres, Ann. d. Sc. N. 1855, v. p. 241. 

 t. 8 c. f. 3-6. 



" Cette espece, a tube court, a spirale raccourcie, dont la dernier 

 tour est sur le meme plan que le second, presente dans son ensemble 

 une forme a pen pres discoide. L' ouverture de la bouche ample, ar- 

 rondie est analogue a celle des Cyclostomes. Les dimensions depas- 

 sentpeu0"-010a0-012." 



Represented on a young specimen of Tridacna gigas, L. ; but, 

 p. 239, it is indicated to be found on Tridacna, Hippopus, and Ser- 

 pula ; p. 238, the species of the latter genus is named Serpula pana- 

 mensis, Chenu, which is V. eburneus, Reeve. 



* It is without doubt Serpula annulala, Lam., 1818, v. p. 364, no. 11. 



