GASTEROPODA, 



461 



then covered with thin glass previously warmed over the flame of a spirit 



lamp. 



Mr. Warington and Mr. Fisher Cocken recommend glycerine (which may 

 be obtained at° Price's, of Vauxhall) as the best medium for microscopic 

 objects ; the glass covers are cemented on with hatter's- varnish (sbell-iac 

 dissolved in spirits of ',;ine), and painted over afterwards with asphalt dis- 

 solved in turpentine, such as the varnish-makers supply. 



SUPPLEMENTARY NOTES ON THE GENERA. 



DiBAPHUS, Phi. 1847. Conohelix edentulus, Sw. {Strombida'i p. 104.) 

 Subcylindrical' spire acute ; aperture narrow, linear, edentulous, excised at 

 the base ; lip thickened, rectilinear, rounded and abbreviated below. 



Riiiz'ocHiLUS (antipathura) Sip. 1850. Pounded on a sp. of Purpura V 

 which lives on the antipathes ericoides. When adult they attach themselves, 

 singly or in groups, to the branches of the coral, or to each other, by a solid 

 extension of the lips of the shell. The aperture becomes closed, with the 

 exception of the respiratory canal. 



Flanaxis,^. 314 (Cerithiadse ?) . This genus was placed with the Buc- 

 cinidce on the statement of xMr. Gray, that the animal was like Purpura. 



BORSONIA (prima) Bellardi, 1838. Is a Pleurotomt with the columella 

 plaited like Miira. Pliocene, Turiu. Eocene, Brit. 



Pachybathron (cassidiforme) Gaskoin. Shell small, oblong, striated 

 with lines of growth ; spire small, depressed, with chanuelled suture ; aper- 

 ture with callous, denticulated lips, like Cypraa. Listr. 3 sp. 

 Calpurnus, Montf. (name) = Ovulum verrucosum. p. 122. 

 Volva (Fleming) = Ovulum patulum, {Calpurna, Leach.) 

 Radius (Montf.) Schum. = Ovulum volva. 



Deshayesia (Parisieusis), Raulin, 1844, (p. 123). Miocene, France. 

 Some additional species have been found with a similar oblique aperture and 

 corrugated inner lip. Baron Ryckholt has described a species {D. Bauhru], 

 from the Deoonian, Belgium. The relation of the genus is uncertain. 



Naticella (Munsteri,D'Orb.) Munster, 1841. This genus, abounding lu 

 the Trias of St. Cassian, has been referred to Natica by D'Orbigny. A 

 characteristic species occurs in the Green-sand of Blackdown, and has been 

 named Natica carinata, J. Sby. (Narica, D'Orb.) It is exactly intermediate 

 between Narica (p. 124) and Fossarus (p. 135) and appears to form with 

 them a little group nearly related to Lacuna (p. 136.) 



Velutiiia inhabits the laminarian Zone, and ranges to 40 fms. T. IceviyaU 

 is sometimes brought in on the fishermen's lines, (olf Northumberluudj, 

 generally adhering to Alcyoniam digitatim (Alder). Dr. Gould obtained it 

 £i-om the stomach of hshes. 



