162 PULMONATA. 



Tribe 2. LIMACINA. 



Mantle shield-like, on the front of the back, entirely covering 

 a fiat, oblong, not spiral shell, produced and free from the 

 neck in front. 



Limacina, Gray, Turton's Man. ed. 2. 109, 111(1840) ; Proc. Zool. 



Soc. 1847, p. 170. 

 Limax, Ferussac. 



CochlesB nudse terrestres. Lister, Conch. 

 Limacoidea, pars, Fitz. 



Synopsis of the Genera. 



1. Limax. Back rounded. Tail keeled. Dorsal shield marked 



vnth concentric striae, simple behind. Shell flat. 



2. MiLAX. Back keeled to the shield. Dorsal shield granu- 



lated or shagreened, truncated, with two small pores on its 

 hinder edge. Shell convex. 



3. Phosphorax. Back rounded above. Dorsal shield marked 



with a smaU posterior marginal luminous disc. 



4. Malino. Back keeled. Dorsal shield large, front half con- 



centrically, hinder longitudinally furrowed. 



1. LIMAX. 



Bodj' elongate lanceolate, tapering behind, hinder part keeled, 

 without any terminal gland. Back with elongate rugosities, 

 separated by anastomosing grooves. Back of the neck with three 

 grooves, the central one double, the lateral ones bent do\\'n to 

 the side of the head just behind the aperture of reproduction 

 on the right side. Shield anterior, marked with concentric stria?, 

 rounded behind, enclosing an internally oblong shelly plate; front 

 edge produced, free nearly to the lateral apertm-e. Pulmonary 

 cavity under the shield, with the opening at the hinder part of the 

 right edge. Orifice of the organs of generation on the side of the 

 head just behind the base of the right tentacle. 



Limax, part., lAster, Hist. Conch, i. 1685. 



Linn. S. N. 1740. 

 Limax, Ferussac, Tab. Syst. 10. 96", 96,, 1821 ; Hist.Moll.u. 



Hnrtmrnin, Neue Alpena, 1821, p. 208. 



Philippi, Handb. Conch. 238. 



Clark, Ann. Sf Mag. N. H. xii. 332. 



