Mascarene Lnnd-Mollusca. 431 



Localiti/. Police Mountain, Mauritius {E. Dupont). 



Animal black and white in the spirit-specimeu, the white 

 con fined to the sole and margin of the foot below the peri- 

 podial grooves, and to the head and neck ; the black on the 

 head extends from the eye-tentacles along the upper side of 

 the neck, wath a narrow white line separating the two. The 

 visceral sac is pale ochraceous, finely dotted with black, the 

 dots closest next the mantle-edge. 



Dorsal lobes small, the right black, the left in two 

 parts, distant from each other ; the anterior speckled, the 

 posterior very small. Foot very distinctly divided. Lobe 

 over mucous pore very small. 



Genitalia. The male organ has at the junction of the 

 vas deferens a long flagellum. The ei)iphallus is short. 

 From the retractor muscle attachment the shaft is a long 

 narrow tube^ swelling near the generative orifice. Situated 

 here, and seen by transmitted light, is what appears to be a 

 small csecum, the free end pointing towards the aperture. 

 The spermatheca is a very long strong tube ending in a thin- 

 walled bulbous sac. This contained a spermatophore in a 

 perfect state of the simplest construction, consisting of an 

 extremely long whip-like flume terminating in an elongate 

 capsule ; the flume has no spines, but at one part the edge is 

 serrated. This is very interesting, and can be compared 

 with the figure of this organ by Prof. C. Semper, pi. iii. 

 fig. 24, of his Rotula rufa, from Bourbon. 



Erepta odontina, Morelet. (Pi. XI. fig. 3.) 



Rev. et Mag. (1851). 



= Helix suffulta, Bs. A. M. N. H. ser. 2, xi. p. 34 (1853) ; Nevill, 



lianina {Erepta), Hand-list, i. p. 44 (1878). 

 Helix li<jldfooti, Pfr. P. Z. S. 1851, p. 150. Australia? 



Locadty. Pouce Mountain, Mauritius [E. Dupont). 



Animal colourless in spirit^ only the eye-muscle showing 

 black, and some black speckling on the mantle where reflected 

 over the edge of the peristome. Foot divided. Mucous 

 pore with a lobe above it. Peripodial grooves distinct. 

 The generative organs (fig. 3) are quite of the type oi Dupontia 

 pei'lucida. The penis-sheath is elongate, cylindrical, with a 

 blunt protuberance on the side, continuing as a diminished 

 tube to tlie retractor muscle. The epiphallus is short • 

 and at the junction of the vas deferens there is a very 

 long thin flagellum. The spermatheca is a very strong, 

 thickened, long tube, with a thin bulbous termination ; 

 it contained a perfect spermatophore. An elongate capsule 



