170 LENGTH. 



LAPLYSIA. See Aplysia. 



LAPLYSIACEA. Lam. (properly Aplysiacea ) A family belonging 

 to the first section of the order Gasteropoda, Lam. containing the 

 genera Aplysia and Dolabella. Fig. 254, 255. 



LARVA. Humph. Fissurella, Lam. 



LATERAL. (Latus, a side.) The lateral teeth are those which, 

 taking their rise near the umbones, proceed to some distance 

 towards the sides of the shell ; as distinguished from the cardinal 

 teeth, which receive their full developement close to the um- 

 bones. Lateral muscular impressions are those which are placed 

 at a distance from each other, on the opposite sides of the 

 shell. 



LATIAXIS. Sw. A genus of " Eburninse/' Sw. corresponding 

 with the genus Trichotropis. Sow. (Sw. Malac. p. 306.) 



LATIRUS. Montf. A genus composed of species of Fusus, 

 Auct. which have an umbilicus and are turriculated. 



LAURTA. Gray. A sub-genus of Pupa, containing P. umbilicata, 

 &c. (Gray's Turton, p. 193.) 



LEGUMINARIA. Schum. A genus composed of species of 

 Solen, Auct. which have an internal longitudinal bar or rib. 

 Fig. 61. S. Radiatus, Lam. 



LEILA. Gray ? Described as having the hinge edge smooth 

 like Iridina, but having a u sharp siphonal inflexion." (Syn. 

 B. M. p. 142.) 



LEIODOMUS. Sw. A genus of " Buccinin8e, ,, Sw. consisting 

 of Terebra vittata and other similar species. This genus corres- 

 ponds with Bullia, Gray. 



LEIOSTOMA. Sw. A genus of "Fusinse," Sw. thus described, 

 "Equally fusiform," (with Fusus) "but ventricose in the 

 middle ; shell entirely smooth , almost polished ; inner lip 

 thickened, and vitreous ; base of the pillar very straight. Fossil 

 only. (fig. 75.) L. bulbiformis. En. Meth. 428. f. 1." 



LEMBULUS. Leach. A genus composed of oval species of 

 Nucula, resembling N. margaritacea, fig. 137. 



LENDIX. Humph. Pupa, Lam. 



LENGTH. See Measurement. 



