126 Dentition of Pulmonate Mollusks. 
Cylindrella elegans, Pir. (Gongylostoma.) Cuba. Mr, 
Arango. 
Lingual membrane (Pl. XIV, fig. B) with 12-1-12 teeth arranged en chevron ; 
centrals long, narrow, apex recurved with three short, bluntly trilobed 
cusps and large cutting point ; laterals with one inner, widely expanding, 
oval, inner cutting point, surmounted by a blunt narrow pedicle, and one 
much smaller cutting point on a narrow, high pedicle; there are no distinct 
marginals, the teeth becoming much modified in shape as they pass off 
laterally. ; 
Oylindrella ornata, Gundl. (Gongylostoma). Cuba. <A dried 
specimen in Mr. Bland’s collection. 
Lingual membrane (Pl. XIV, fig. A) with 18-1-18 teeth; as in last 
species. . 
Cylindrella Poeyana, 1)’ Orb. 
sae Mere, Mol, Wo 
Macroceramus, 
Jaw as in Cylindrella. 
Lingual membrane, See Terr. Moll. V. 
Macroceramus Gossei, Pfr. See Terr. Moll., V. 
Macroceramus turricula, Pfr. Lomas de Camoa, Cuba. Mr, 
Arango. 
Jaw with 35 ribs. 
Lingual membrane as in last species (P]. XIV., fig. D). 
Macroceramus inermis, Gundl. Curagao. Mr. J. 8. Gibbons. 
Lingual membrane as in M, Gossei. 
Pineria. 
Pineria Viequensis, Pfr. Island of St. Martin. Dz. van 
Rijgersma. 
Jaw with about 28 ribs as in Cylindrella (Pl. XV, fig. B’; upper median 
portion of the jaw figured is imperfect. 
Lingual membrane (Pl. XIV, fig. C) as in group A of Cylindrella; laterals 
two ; marginals five or six, long, narrow, simple, with irregularly recurved 
upper margins, 
ee anneal 
