<:. \-TKOPODA 1071 



Subulli*. cwrdl.] 



nun., lint in every other respect, as far as we can discover, they are absolutely 

 identical. Moreover, the species is recognizable over a geographical range extending 

 from Tennessee and Kentucky to Minnesota in one direction, and Ottawa, Canada, 

 in another. 



SUBULITKS OONRADI, H. Sp. 

 I'LATE LXXXI. KIGS. 4 and 4. 



extremely elongate-fusiform; the spire slender, lung, and tapering not much more gradually 

 Tii.in the base, which Is somewhat truncated; outline on each side gently arcuate, the lower part of the 

 middle third of the length perfectly cylindrical; whorls flat, about four and a half In casts of the Interior, 

 th- uppermost of these having an obtuse termination and a diameter of about mm. In a specimen whose 

 greatest diameter Is about 16 mm.; whorls preceding this not observed; suture linear; aperture long, very 

 narrow, expanding gradually from the suture, but contracting again near the base; body whorl tapering 

 very gradually. 



This agrees rather closely with all that can be made out of Hall's poor flgure (Pal. N. T., vol. I, pi. 

 \ \ \ IX. flg. 5a) of Conrad's original type of 8. elonyatut, but as It differs from the other specimens figured 

 by Hall, as well as from specimens obtained from Watertown, N. Y., said to be of Conrad's species, we 

 have hesitated to Identify our species with 8. elongate*. 



Formation and lontlity. Stones River group, Ooodhue county, Minnesota. A specimen recently 

 received from Mr. W. R. Billings, of Ottawa, Canada, who collected it in rocks of the Black River group, 

 associated with S. eanadmii, near Ottawa, appears to be of this species. 



CWlMNoM. R. O. Ulrica (4 specimens); W. H. Scofleld (0 specimens). 



SUBI'LITKS CANADKN8I8, W. ftp. (Ulrictl.) 

 PLATE I.XXXI. H0.. 



Our flgure of this species was made up from several fragments of a tiubuliu* collected several years 

 ago at Ottawa, Canada. At that time we supposed that the specimens belonged to 8. eionyatui Conrad, 

 and the flgure was prepared to show what we knew, or rather what we believed we knew, of that species. 

 In going over the subject once more we concluded that It was certainly distinct from S. tlongahu. Quite 

 recently we received several specimens more of the same form from Mr. W. R. Billings, and learned that 

 the species occurs at Ottawa, not in the Trenton limestone, as we supposed, but In the Black River group. 

 As the species seems to be a well-marked form, and distinct from all others known to us, we propose to 

 designate It as above. It Is a more robust specie* than 8. conradi (one of the fragments before us Indi- 

 cate* a total bight of at least 1 mm.), with the aperture wider below, the whorU slightly convex In the 

 spire, and the body whorl more ventrlcose and tapering more rapidly, while the spire tapers more regu- 

 larly and more rapidly. The greatest diameter of the largest fragment Is 22 mm. 



and locality.- Black River group, Lot 3, Con. 3 It, Gloucester, near Ottawa, Canada. 



'. UlrL-h. 



SUBULITKS DIXONKNSIS, n. Sp. 

 I-I.ATK I.XXXI. FIGS. *-. 



This form is distinguished from 8. omradi by Its wider aperture and more distinct basal truncation; 

 also by the peculiar fullness near the middle of the body whorl, and the more rapid taper downward caused 

 thereby. These differences are shown very clearly by our figures of the two species on plat? LXXXI 



formation and locality. Three specimens were collected at Dlion, Illinois, where they occurred In 

 the upper part of the Stones River group. 



.-E. O. Ulricb. 



