176 PROCEEDINGS OF THE ACADEMY OF [1899. 



a. — SPIRALS FINE, NEARLY UNIFORM. 



T. latior C. B. Adams — wh. 9 + the nearly transverse, flattened 



nucleus; ribs 20-24; spirals = numerous, crowded, cutting inta 



sides of ribs. .215 X .065 inch. 

 T. Riisei Morch, 1875— not Dall, 1889— wh. ? + nucleus ?; ribs 



about 40; spirals = fine strise on all intercostal spaces. Sh X 1^ 



mm. 

 T. Pilshryi Bush — wh. 6 -|- the oblique, flattened nucleus; ribs 



about 26; spirals = exceedingly fine on all intercostal spaces. 



4| Xli mm. 



h. SPIRALS INCISED AND RAISED, 



T. pupoides d'Orbigny — wh. 7-8 + the nearly transverse, flattened 

 nucleus ; ribs 22-30; spirals — scarcely discernible lines on whorls 

 and raised rounded threads on base. 3^4 X 1 mm. 



T. phrikalea Watson — wh. 7, with tilted nucleus; ribs 25; spirals =^ 

 raised rounded threads on base. .13 X .039 inch. Deep water. 

 Same as preceding. 



C. — SPIRALS RAISED. 



T. asperula Bush — wh. 6 + the oblique, flattened nucleus; ribs 26; 

 spirals = raised, rounded threads on all intercostal spaces, 

 3X1 mm. 



List of other species of Chemnitzia which are not referable to the 

 genus Tarhonilla, with notes. 



Chemnitzia Americana d'Orbigny, 1847 (?) — Generic relations 

 doubtful. Original description not accessible; the figure, as re- 

 produced by Try on, strongly resembles some species of Seala. 



Chemnitzia Buhylonica C. B. Adams, 1846 — Strongly carinated 

 Odostomia (Cingulina). 



Chemnitzia caneellata d'Orbigny, 1853 — not Dunkeria cancellata 

 Carpenter, 1857 — Spirally granulose Odostomia. 



Chemnitzia dubia d'Orbigny, 1853 — not Odostomia dubia Jeffreys 

 — Has not the nucleus of a Turhonilla. The figure given in 

 atlas, lie de Cuba, does not agree with the description. Can 

 possibly be referred to the genus Fenella. 



Chemnitzia elegans d'Orbigny, 1853 — not Tarbonilla elegans Ver- 

 rill, 1872, nor Odostomia elegans A. Adams, 1860, nor Mon- 



