208 AMERICAN JOURNAL 



Lingual membrane with about 21 — 1 — 21 teeth in each row. 

 Teeth not essentially differing from those of H. tridentata. (See 

 Land and Fr. W. Shells of N. A. Part I., p. 130.) 



Helix tudiculata, Binney, (PL 9, fig. 7.) 



Jaw thick, long, narrow, slightly arched ; ends but slightly 

 attenuated, blunt ; anterior and posterior surface equally show- 

 ing six stout, broad ribs, denticulating either margin. 



Lingual membrane long and narrow, composed of numerous 

 rows of about 50 — 1 — 50 teeth each, Centrals and laterals as 

 usual in the genus. (See pi. 9, fig. 7.) Uncini as in Helix facta. 

 (See Land and Fr. Water Shells of N. A., Part I., p. 176.) 



One central and one lateral are given in the plate. 



BULIMUS MULTICOLOR, Rang. 



The sjiecimen examined was preserved in the Museum of 

 Comparative Zooology at Cambridge. 



Jaw thick, greatly arched, ends attenuated, bluntly rounded ; 

 striate, but with no signs of ribs on the anterior surface, nor of 

 median projection to the cutting edge. 



Lingual membrane long and narrow, composed of numerous 

 rows of about 40 — 1 — 10 teeth each. Centrals and laterals as 

 usual in the genus. (See Bulimulus siifflatus, below.) Uncini 

 small, subquadrate, with one long, stout, blunt denticle and one 

 shorter one at its side. 



BuLiMUS Hanleyi, Pfr. 



The specimen examined was collected in Brazil, by Mr. J. G. 

 Anthony. 



Jaw strongly arched, stout, striate transversely, of almost 

 equal width throughout ; ends but slightly attenuated, blunt ; 

 cutting edge with a broad, stout, striate median projection. 



Lingual membrane long and narrow, composed of numerous 

 rows of about 50 — 1 — 50 teeth each. Centrals, laterals and 

 uncini as usual in the genus. (See Bulimulus pallidior, in Ann. 

 N. Y. Lye. vol. ix, p. 282). 



BULIMUS MAGNIFICUS, Grat. 



The specimen examined was received from Brazil, by the Mu- 

 seum of Comparative Zoology at Cambridge. 



Jaw stout, long, slightly arciied, narrow, of almost uniform 

 width throughout ; ends slightly attenuated, blunt ; entire ante- 

 rior surface covered with numerous stout blunt ribs, breaking 

 the regularity of both upper and lower margins, but scarcely 

 denticulating them. 



Lingual membrane long, rather broad, composed of about 



