GASTEROPODA. 117 



Sub-genera. Olivella, Sw. 0. jaspidea, pi. VI., fig. 19. 



Animal with small, acute frontal lobes. Operc. nucleus sub-apical. 



Scaphula, Sw. O utriculus, pi. VL, fig. 18. 

 Frontal lobes large, rounded, operculate. 



Agaronia, Gray. 0. hiatula, pi. VI., fig. 17. 

 No eyes or tentacles. Frontal lobes moderate, acute. 



ANCILLARIA, Lam. 



Etyrn., ancilla, a maiden. 



Types, A. subulata, pi. VI., fig. 20. A. glabrata, pi. VI. fig. 21. 



Shell like oliva ; spire produced, and entirely covered with shining 

 enamel. Operc. minute, thin, pointed. Lingual teeth pectinated. Uncini 

 simple, hooked. 



Animal like oli va ; said to use its mantle-lobes for swimming. (D'Orb.) 

 In A. glabrata, a space resembling an umbilicus, is left between the callous 

 inner lip and the body whirl. 



Distr., 23 sp. Red Sea, India, Madagascar, Australia, Pacific. 



Fossil, 21 sp. Eocene . Brit., France, &c. 



FAMILY TV. CcfNiDja, Cones. 



Shell inversely conical ; aperture long and narrow ; outer 

 lip notched at or near the suture; operculum minute, 

 lamellar. 



Animal, foot oblong, truncated in front ; with a conspi- 

 cuous (aquiferous?) pore in the middle. Head produced. 

 Tentacles far apart. Eyes on the tentacles. Gills 2. Lin- 

 gual teeth (uncini ?) in pairs, elongate, subulate, or hastate. 



CONUS, L. Cone-shell. 



Types, C. marmoreus, pi. VII., fig. 1. C. geographicus, antediluvianus, &c. 



Shell conical, tapering regularly ; spire short, many-whirled ; columella 

 smooth, truncated in front ; outer lip notched at the suture ; operculum 

 pointed, nucleus apical. 



Distr., 269 sp. AU tropical seas. Medit., 2 ; Africa, 23 ; Red Sea, 5 ; 

 Asia, 124 ; Australia, 16 ; Pacific, 25 ; Gallapagos, 3 ; W. America, 20 ; 

 W. Indies and Brazil, 21. 



Fossil, 80 sp. Chalk . Brit., France, India, &c. 



The cones range northward as far as the Mediterranean, and southward to 

 the Cape ; but are most abundant and varied in equatorial seas. They inhabit 

 fissures and holes of rocks, and the warm and shallow pools inside coral-reefs, 

 ranging from low water to 30 and 40 fathoms ; they move slowly, and some- 

 times (C. aulicus) bite when handled ; they are all predatory. (Adams.) 



Sub-genus. Conorbis, Sw. C. dormitor, PL VII., fig. 2. Eocene . 



Brit., France. 



* Fig.- 72. Lingual teeth of bela turricula (after Lov6n). 



