GASTEROPODA. HI 



Submenus. Cominella, Gray. Ex. B. limbosum, purpura maculosa, &c. 

 Operculutti as mfusus. About 12 sp. 



PSEUDOLIVA, Swainson. 



Etym., named from its resemblance to oliva, in form. 



Syn., sulco-buccinum, D'Orb. Gastridium (Gray), G. Sowerby. 



Type, P. plumbea. PL V., fig. 12. 



Shell globular, thick ; with a deep spiral furrow near the front of the 

 body-whirl, forming, as in monoceros, a small tooth on the outer lip ; spire 

 short, acute ; suture channelled ; inner lip callous aperture notched in front ; 

 operculum ? Animal unknown. 



Distr., 6 sp. ? W. America. 



Fossil, 5 sp. Eocene. Brit., France, Chile. 



? ANOLAX (Roissy), Conrad. Lea. 



Etym., an aulax, without furrow. 



Syn., buccinanops, D'Orb. Leiodomus, Sw. Bullia, Gray. 



Types, A. gigantea, Lea- Buc. Isevigatum. B. semiplicata, PI. V., fig. 14. 



Shell variable ; like buccinum, pseudoliva, or terebra ; sutures enamelled ; 

 inner lip callous. 



Animal without eyes ; foot very broad ; tentacles long and slender ; 

 operculum pointed, nucleus apical. 



Distr., 26 sp. Brazil, W. Africa, Ceylon, Pacific, W. America. 



Fossil, 3 sp. Eocene . N. America, France. 



I? HALIA, Eisso. 

 Etym., halios, marine. Syn., priamus, Beck. 

 Types, bulla helicoides (Brocchi). Miocene, Italy. Helix priamus (Meus- 

 chen). Coast of Guinea ? 



Shell like achatina ; ventricose, smooth ; apex regular, obtuse ; operc. ? 

 The fossil species occurs with marine shells, and sometimes coated by a coral 

 (lepralia). 



TEREBRA, Lamarck. Auger-shell. 

 Syn., acus, Humph. Subula, Bl. Dorsanum, Gray. 

 Type, T. maculata. PI. V., fig. 13. 



Shell long, pointed, many-whirled ; aperture small ; canal short ; operc. 

 pointed, nucleus apical. 



Animal blind, or with eyes near the summit of minute tentacles. 



Distr., 109 sp., mostly tropical. Medit. (1 sp.) India, China, W. America. 



Fossil, 24 sp. Eocene . Brit., France, Chile. 



EBURNA, Lamarck. Ivory-shell. 

 Etym., elur, ivory. Syn., latrunculus, Gray. 



