OF CONCHOLOGT. 175 



Hyalina (?) Baudoni, Petit {Morchia). 



Lingual membrane long, broad, composed of numerous trans- 

 verse rows of teetn arranged en chevron ; central teeth not dis- 

 tinguishable on the membrane examined, but probably very 

 small; lateral teeth absolutely wanting: marginals numerous, 

 long, slender. 



In the absence of the lateral teeth and general character of 

 the membrane, this species resembles those of Macroeyclis alone 

 of the Helicidce. 



Specimen collected in Dominica, and membrane mounted by 

 Mr. R. J. Lechmere Guppy, of Trinidad, from whom we re- 

 ceived it. 



Macrocyclis Voyana, Newcomb. 



Lingual membrane long and narrow, composed of numerous 

 rows of teeth arranged en chevron. Centrals long, incurved at 

 sides, their lower margins excavated ; with three small, sharply 

 pointed cusps. Laterals entirely wanting. Marginals in curving 

 diagonal rows, simple, aculeate, decreasing rapidly in size at the 

 outer margin of the membrane. 



From this description it will be seen that M. Voyana agrees 

 in the general character of its lingual dentition with M. concava 

 and M. Vancouverensis, already described by us. 



Specimen received from Mr. H. Hemphill. 



Sagda connectens, C. B. Adams [Sagda s. str.) 



Number of teeth in the membrane, in each row, about 26 — 1 

 — 26, all of which are as usual in the genus Helix. Centrals 

 tricuspid, laterals bicuspid ; marginals broad, low, with one 

 acute, oblong, inner denticle, and several shorter, acute side 

 denticles. 



Specimen received from Mr. Jas. Milligan, who collected it in 

 Jamaica. 



Sagda Haldemaniana, C. B. Adams (Ilyalosagda.) 



Jaw slightly arcuate, of almost equal height throughout; ends 

 blunt ; no anterior ribs, and no median projection. 



Lingual membrane with about 30 — 1 — 30 teeth in each row- 

 Teeth as usual in the genus Helix. Centrals tricuspid ; first 

 laterals with an obsolete inner side cusp, other laterals bicuspid ; 

 marginals with one long, blunt, stout, oblique denticle, with a 

 single short, stout, blunt side denticle ; extreme marginals ir- 

 regularly denticulated, the denticles slender and pointed, usually 

 with one inner long and several side short denticles. 



