10^ CHILINA. 



CHAMACEA. Lam. A family belonging to the order Conchifera 

 Dimyaria, Lam. described as inequivalve, attached, irregular ; 

 with or without a single rough tooth on the hinge ; with two 

 lateral muscular impressions in each valve. This family contains 

 the genera — 



1. Chama. Leafy; umbones spiral. Fig. 153. 



2. Etheria. Very irregular, pearly, without teeth. Fig. 155. 



3. Diceras. Like Chama, but the umbones free, produced. 

 Fig. 154. 



CHAMBERED. When the cavity of a shell is not continuous, but 

 is divided by shelly diaphragms or septa, it is said to be cham- 

 bered. This is the case with the shells of the Polythalamous 

 Cephalopoda, as in the Nautilus (see Introduction). The character 

 is not confined to these, as it occurs in some species of Spon- 

 dyli, and in several turrited univalves. 



CHAMQSTR/EA. DeRoissy. Ci.eidoth^rus. Stutch. 



CHARYBS, Montf. A genus of microscopic Foraminifera. 



CHELIBS. Montf. A genus of microscopic Foraminifera. 



CHELINOTUS. Sw. A genus of " Haliotid^," Sw. including 

 Velutina, Lam. a species of Sigaretus from Tonga, and Coriocella, 

 Bl. Thus described, "Animal cheloniform, broad ; depressed; 

 the mantle larger than the shell, lobed in front ; tentacula two, 

 short, obtuse ; eyes basal ; mouth circular ; shell ear-shaped, thin, 

 fragile, imperforate ; pillar none." 



CHELONOBIA. Leach. Coronula Testudinaria, Auct. Fig. 15. 



CHERSINA. Humph. Achatina, Lam. 



CHICOREUS. Montf. A generic division of the genus Murex, 

 consisting of such species as have three ramified varices. Ex. M. 

 inflatus, fig. 395. 



CHILINA. Gray. Fam. Auriculacea, Bl. Colimacea, Lam. — 

 Descr. Oval, thin, covered with an olive green epidermis ; spire 

 rather short, consisting of few whorls ; aperture large, oval, 

 rounded anteriorly ; outer lip thin, joining the inner lip without 

 a sinus ; inner lip spread over part of the body whorl, termi- 

 nating in a thick columella with one or two folds. —Obs. These 



