COCHLITOMA. Ill 



what like that which joiners call dove-tailing. Operculum, 

 consisting of two unequal pointed valves. — Obs. Clitia is known 

 from Creusia, by the articulations of the valves, and by the 

 operculum, which in Creusia consists of four valves. Fig. 

 20. C. Verruca, (Lepas Verruca, Gmelin.) Britain and Peru. 



CLOSE. The margins of a bivalve shell are described as being 

 close, when there is no hiatus between them in any part, other- 

 wise they are described as gaping. 



CLOTHO. Faujas. Fam. Conchacea, Bl. More properly belong- 

 ing to the Pyloridea, Bl. ; and the Lithophagidse, Lam.— Descr. 

 "Oval, nearly regular, longitudinally striated, equivalve, sub- 

 equilateral ; hinge consisting of a bifid tooth, curved like a 

 crochet, larger in one valve than in the other." This descrip- 

 tion is translated from Blainville, who states that he has never 

 seen the shell. Annales du Museum D'Histoire Naturelle, torn. 

 9, pi. 17, fig. 4—6. 



CLYPEIFORM. (Clypeus, a shield.) Open, flat, shaped like a 

 shield or buckler, as Umbrella, fig. 233, and Parmophorus, fig. 

 242. 



CLYPIDELLA. Sw. A sub-genus of Fissurella, described as hav- 

 ing one extremity of the shell slightly raised. C. pustula. Sow. 

 Gen. fig. 3. 



COAT OF MAIL. A common name given to shells of the genus 

 Chiton, on account of their resemblance to jointed armour. 



COBRESIA. Hiibner. Vitrina, Auct. 



COCHLIATE. {Cochleare, a spoon). Applied to any shell or part 

 which is hollow and oval, as Patellae, &c. The cavity containing 

 the cartilage in Mya, fig. 71, is Cochleate. 



COCHLICELLA. One of the sub-genera into which De Ferrusac 

 has divided the genus Helix, consisting of Bulinus decollatus, 

 fig. 279, and similar species. See Helix. 



COCHLICOPA. Fer. A sub -genus of Helix, partly correspond- 

 ing with Polyphemus of De Montfort, and consisting of species 

 of Achatina, which have the outer lip undulated. 



COCHLITOMA. Fer. A sub -genus of Helix, corresponding with 



