118 CONILITES. 



scribed as a pair of rapidly enlarging, oblique cones, and the 

 aperture of every spiral shell would be its base. But this phra- 

 seology being in disuse, it is only mentioned here that it may be 

 understood when occasionally met with. 



CONELLA. Sw. A genus composed of species of the genus Co- 

 lumbella, Lam. which have a conical form, and which, on that 

 account, are considered by Swainson as belonging to his family 

 of Coninse. Swains. Lardner. Cyclop. Malac. described at p. 312. 

 C. picata, Sw. fig. 17, a. p. 151. 



CONFLUENT. A term applied to two parts of a shell when they 

 gradually flow into each other, as, for instance, the inner and 

 outer lips of Univalves when they pass into each other at the 

 anterior extremity, without the intervention of a notch or angle. 



CONIA. Leach. Fam. Balanidea. Order, Sessile Cirripedes, 

 Lam. — Descr. Four rather irregular valves, of porous struc- 

 ture, placed side by side, so as to form a circular cone, sup- 

 ported at the base on a shelly plate, and closed at the aperture by 

 an operculum consisting of four valves in pairs. Distinguished 

 from Creusia by its porous structure and by its flat support ; that 

 of Creusia being cup-shaped. Fig. 21, Conia porosa. 



CONICAL. A term applied in the ordinary sense, and not as ex- 

 plained above, under the word Cone. 



CONIDEA. Sw. A genus separated from Columbella, Lam. thus 

 described, " Mitra shaped, fusiform ; spire equal or longer than 

 the aperture ; the whorls tumid ; outer lip slightly gibbous above, 

 contracted below ; margin not inflected ; striated within ; inner 

 lip terminating in an elevated ridge, but with the teeth obsolete. 

 C. semipunctata, {Columbella, Lam,.) Mart. 44. fig. 465, 466." 

 Africa. 



CONILITES. Fam. Orthocerata, Lam. & BL— Descr. "Conical, 

 straight or slightly curved ; having a thin external covering, in- 

 dependent of the nut or alveole, which it contains. Alveole 

 transversely chambered, sub-separable." (Translated from Lam.) 

 — Obs. The difference between Belemnites and Conilites is that 

 the external sheath of the latter is thin, and not filled up with 

 solid matter, from the point of the alveole to the apex, as in the 



