b TIIK NAUTILUS. 



V. rugo^ula Sterki. South Atlantic and Gulf coasts, Cal. 



var. ovuluiu Sterki.'* Fla. 

 V. ovata Say. All N. A, 

 V. ventricosa Mse. Northeast to Ohio. 

 V. gouldii Biun. Northeasc to Mont. 



approxinians Sterki. 111. 

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

 Indies. 



var, arthuri v. Mart. ? 

 V. sp. Tex. 

 V. sp. N. ]Mex. 

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



parvula Sterki. Ohio. 

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



HoLOSPiRA Alb. ct Mart. 



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



var. minor Ckll. mss. 

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

 H. arizonensis Stearns. Ariz. 



Strophia Alb. 

 Str. incana Binn. S. Fla. 



* ''^ * 

 Pupa krausseana Reinh. ? 

 Vert, arctica Wall. ? 



1. The proposition to place Strobila under Pupidse will hardly 

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

 tion. The soft parts agree with those of Pupidse, 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. australis 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 \vell as in Europe ; and thus P. alti- 



* Pulmonifera of Maine, p. 32. 



