174 PROCEEDINGS OF THE ACADEMY OF [1899. 



T. dispar Pilsbry — wli. 8 + the transverse, flattened nuclens ; ribs 

 indistinct; sj)irals = abont 5 lines. 8.2 X 2.3 mm. 



T. incisa Bush — wh. 9 + the slightly oblique, flattened nucleus; 

 ribs 20 ; spirals = 6 or 7 lines. 6| X 14 mm. 



b. SPIRALS UNEQUAL, COARSE AND FINE. 



T. Eushii Bush — ^vh. 12 + (nucleus wanting) ; ribs 24; spirals = 2 

 subequal grooves just above suture, 2 similar ones above middle, 

 and finer lines. 9^ X 2^ mm. 



T. Conradi Bush — wh. 12 + the transverse, flattened nucleus; ribs 

 about 22 ; spirals = 1 groove above suture, a band of 3 unequal 

 ones on middle, and fine lines. 8^ X about 2 mm. 



T. pyrrha Bush — wh. 10 + the slightly oblique nucleus; ribs 28- 

 42; spirals variable = 1 sutural groove, sometimes a second 

 above middle, and fine lines. About 6X1^ mm. 



T. oheliscus C. B. Adams, 1850— not T. obellscus Gould, 1861, 

 nor 0. obellscus Garrett, 1871, nor Jefh-eys — wh. 11 + (nucleus 

 wanting); ribs 26-30; spirals = 1 broad line above middle, simi- 

 lar ones on middle and anterior of body- whorl, and crowded 

 strise. .25 X .05 inches. 



T. punicea Dall — wh. 13, with transverse, flattened nucleus; ribs 

 18-22; spirals =1 sutural and 1 median groove Avith several fine 

 lines. 8 X 1.75 mm. 



T. puncta C. B. Adams — wh. 10-11 + the obhque, nearly flattened 

 nucleus ; ribs 26—30 ; spirals = 1 sutural groove, 1 similar one 

 above middle, and very fine, crowded lines, .22 X .05 inch, or 

 6i X 1| mm. 



T. substriata C. B. Adams — wh. 8 + the oblique, nearly flattened 

 nucleus; ribs 22-24; spirals =1 inconspicuous, median groove, 

 and exceedingly fine lines. .115 X .04 inch. 



T. subulata C. B. Adams, 1850 — not Holmes, 1860, nor 0. subu- 

 lata Philii^pi, 1860 — wh. 10 + the oblique nucleus; ribs 28-30; 

 spirals = exceedingly fine crowded lines, one next below suture 

 larger. .17 X .045 inch. 



T. suturalis Gould, 1862 — not 0. suturalis Philippi, 1844 — wh. 

 7-8 with nucleus (?) ; ribs 10-12 ; spirals = very fine strise, 1 near 

 suture more impressed. 3 + X 1 mm. Near preceding. 



T. fulvoeinda (Jeffreys) Dall — not Thompson — wh. 9 + the trans- 

 verse, nearly flattened nucleus; spirals = 6 or 7 coarse lines and 

 6-12 fine ones. 5^ X 1| mm. (= T. lineolata Bush). 



