180 LEPAS. 



LAUEIA. Gray, 1840. A sub-genus of Pupa, containing P. 

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



LEDA. Sebum. 1817. Those species of Nucula, Lamarck, 

 wbicb bave a rostrated form. Leda caudata. PL xxvii. fig. 

 578. 



LEGUMINAEIA. Sebum. 1817. Siliqua, Megerle, 1811. A 

 genus composed of species of Solen, Auct. wbicb bave an in- 

 ternal longitudinal bar or rib. Pig. 61. S. Eadiatus, Lam. 



LEILA. Gray, 1840. Described as baving tbe binge smootb 

 like Iridina, but baving a " sbarp sipbonal inflection." (Syn. 

 B. M. p. 142.) Anodon esula. 



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

 of Terebra vittata and otber similar species. Tbis genus corres- 

 ponds witb BuUia, Gray. 



LEIOSTOMA. Swainson. A genus of " Pusinse," Sw. tbus 

 described, " Equally fusiform," (witb Pusus) "but ventricose 

 in tbe middle ; sbeE entirely smootb, almost poHsbed ; inner lip 

 tbickened, and vitreous ; base of tbe pillar very straight. Possil 

 only. {jig. 75.) L. bulbiformis. En. Metb. 428. f. 1." PI. 

 xxvi. fig. 549. 



LEMBULUS. Leacb. A genus composed of oval species of 

 Nucula, resembling N. margaritacea, fig. 137. 



LENDIX. Humpb. Pupa, Lam. 



LENGTH. See Measueement. 



LENTICULAE. (Lens.) Of a circular, convex form, as Pec- 

 tunculus, fig. 134. 



LENTICTJLINA. Lam. A genus of microscopic Poraminifera. 

 — Descr. Lenticular, sub-discoidal, compressed, convolute, sym- 

 metrical ; aperture notched ; chambers few in number ; visible 

 on the exterior, radiating from tbe centre of tbe disk. 



LEPADICEA. Bl. The first family of tbe class Nemantopoda, 

 Bl. Tbis family consists of tbe same animals which constitute 

 tbe Pedunculated Cirripedes of Lamarck, and part of tbe genus 

 Lepas in tbe system of Linnaeus. It contains tbe genera Gym- 

 nolepas, Pentalepas, Polylepas and Litbolepas. 



LEPAS. (AfTrac, lejtas, a rock.) Tbe Linnsean name Lepas 



