248 PROCEEDINGS OF THE ACADEMY OF 
Nanina subcircula, Mousson. 
Raiatea, Society Islands, Mr. Garrett to Dr. W. D. Hartman. 
Jaw not observed. 
Teeth (pl. X-X., fig. 1) with obsolete side cusps, but distinct 
cutting points on the centrals. Laterals unsymmetrical as usual 
by the suppression of the inner cutting point, and inner lower 
lateral expansions to the base of attachment. Marginals aculeate, 
bifid. 
The species is viviparous. 
Endodonta tumuloides, Garrett. 
Raratonga I., Cook’s Isle. Received from Dr. W. D. Hartman, 
who received it from Mr. Garrett. . 
Teeth 17—1—17, with about 7 perfect laterals (pl. XXL., fig. 6). 
The base of attachment of the centrals is subequilateral. There 
are distinct side cutting points and cusps. The median cusp is 
long. Laterals unsymmetrical as usual. Transition formed as 
usual. Marginals low, wide, with one long, large, bifid inner cut- 
ting point and one small side cutting point. 
Jaw not observed. 
Helix astur, Souv. 
New Caledonia, Mr. Thomas Bland. 
Jaw (pl. XX., fig. 11) low, wide, slightly arcuate; ends scarcely 
attenuated, blunt; anterior surface without ribs; a wide, blunt, 
median projection to the cutting edge; a line of reenforcement 
running above, and parallel to, the cutting margin; a strong © 
muscular attachment to the upper margin. 
Lingual membrane (pl. XX., fig. 12) with 30—1—30 teeth, with 
about 9 perfect laterals. Centrals (a) with square base of attach- 
ment, well-developed side cusps and cutting points ; laterals same 
as centrals, but unsymmetrical as usual; transition to marginals 
formed as usual (0); marginals (c) low, wide, with one inner, long, 
broad, bifid cutting point, and one outer, small cutting point; 
those figured (¢c) are extremes. 
Helix (Thelidomus) auricoma, Feér. 
Lomas de Camoa, Cuba. Mr. Arango to Mr. Bland. 
Jaw arched, with blunt, scarcely attenuated ends; 12 broad ribs 
distributed over the whole anterior surface and denticulating either 
margin; no median projection to the cutting margin. 
Lingual membrane (pl. XXI., fig. 5), with 42—1—42 teeth, of 
