6 THE NAUTILUS. 



V. rugosula Sterki. South Atlantic and Gulf coasts, Cal. 



var. ovulum Sterki.* Fla. 

 V. ovata Say. All N. A. 

 V. ventrieosa Mse. Northeast to Ohio. 

 V. gouldii Binn. Northeasc to Mont. 



approximans Sterki, 111. 

 V. bollesiana Mse. Maine to Ind., Va. and Tenn. (also West 

 Indies. 



var. arthuri v. Mart. ? 

 V. sp. Tex. 

 V. sp. N. Mex. 

 V. tridentata Wolf. Me. to Ohio and Minn. 



j^arvula Sterki. Ohio. 

 V. oscariana Sterki. Fla., Tex., Tenn. 



HoLOSPiRA Alb. & Mart. 



H. roemeri Pfr. Tex. (Mex.). 



var. minor Ckll. rass. 

 H. goldfussi Mke. Tex. (Mex.). 

 H. arizonensis Stearns. Ariz. 



Stropiiia Alb. 

 Str. incana Binn. S. Fla. 



Pupa krausseana Reinh. ? 

 Vert, arctica Wall. ? 



1. The proposition to place Strobila under Pupid?e will hardly 

 meet with much opposition ; it seems to be its nearest natural posi- 

 tion. The soft parts agree with those of Pupida?, and so does the 

 shell, except its more depressed form which, however, can be no 

 objection if we compare it with Hypselostoma, etc. Acanthinula, 

 too, we might range here, as also Morse did,* for the American 

 species. 



2. This species is evidently related to P. ausfralis Ad. & Ang. 



3. There are, among the common low form, high specimens with 

 narrower penultimate and wider last whorl, found everywhere 

 occasionally in this country as well as in Europe ; and thus F. alti- 



* Pulmonifera of Maine, p. 32. 



