100 FAMILIES AND GENERA. 



Lepetidse. (PROSOBRANCHIATA.) Plate xxi. 

 Lepeta, crown almost central, 322. 

 Propilidium, crown central, a shell-like, triangular plate, 323. 



Limaeidse. (PULMONATA.) Plate xviii. 



Amalia, breathing hole in posterior half of shield, shield sha- 

 greened, 232, 233. 



Limax, breathing hole in posterior half of shield, shield concen- 

 trically wrinkled, 234-240. 



Avion, breathing hole half-way along shield, shell of loose 

 calcareous grains, covered by hinder part of shield, 241-245. 



Geomalacus, breathing hole near front edge of shield, shell ungui- 

 form, imbedded in the shield, 246. 



Limaeinidse. (OPISTHOBRANCHIATA.) Plate xxx. 

 Spirialis, 583. 



Limapontiidse. (OPISTHOBRANCHIATA.) * Plate xxxi. 



Limapontia, no tentacles, 589. 

 Acteeonia, two tentacles, 590. 



Limidse. (PSEUDOLAMELLIBRANCHIATA.) Plate v. 

 Lima, 44-48. 



(PULMONATA.) Plate xvii. 

 Ancylus, shell hood-shaped, 205, 206. 

 Limnaa, shell spiral, 207-214. 

 Planorbis, shell a flat coil, 215-226. 



LittOPinidSB. (PROSOBRANCHIATA.) Plate xxiii. 



Lacuna, pillar channelled or grooved, 392-396. 

 Littorina, pillar not channelled or grooved, 387-391. 



Lomanotidse. (OPISTHOBRANCHIATA.) Plate xxxii. 

 Lomanotus, 597. 



Lueinidse. (EULAMELLIBRANCHIATA.) Plate vii. 



Lucina, shell circular, bsaks depressed, 61, 62. 

 Loripes, shell circular, lateral teeth remote and indistinct, 63, 64. 

 Diplodonta, ligament wholly external, 65. 

 Ax inns, shell globular, posterior side angulated, 66-68. 

 Montacuta, shell minute, thin, oblong, anterior side the longer, 

 ligament internal, 69-72. 



