THE NAUTILUS. 45 



these shells should be separated from rusticana without 

 examining a larger series showing the variation. 



(24.) ;S. verrilli Bid. Apparently belongs to sect. Lucence, but 

 I have not seen specimens. 



(25.) S. grcenlandica Beck. Specimens in the Binney and 

 Bland collection from Kuksuk, Greenland, almost cer- 

 tainly belong to this group ; although the species seems 

 to have leaning toward the Campestres, with which it 

 allies itself through S. chrysis and S. annexa. 



Section IV. Campestres. 



(26.) S. campestris Say. Mr. Singley sent me specimens of this 

 from Long Key, Florida ; they seemed to me nearly identi- 

 cal with S. liiieata from Kremmling, Colo. A variety of 

 campestris was named inflata by Lea. 



(27.) S. lineata W. G. Binney. Found in rejectamenta at Kremm- 

 ling, Colo., together with a form elongata, Ckll., J. of Conch., 

 1892, p. 39. 



(28.) S. greerii Tryon. This is considered a synonym of aS. o&/?5'wa, 

 but a dead shell in the Binney and Bland collection from 

 Vicksburg, Miss. (Tryon), appeared to resemble campestris. 



(29.) S. chrysis Westerl. 



(30.) S. annexa Westerl. This and the last appear to belong here, 

 but are probably related somewhat to grcenlandica. The 

 presence of whitish streaks on the arctic species is note- 

 worthy. Dr. von Martens (Conch. Mittheilungen, 1885) 

 has described a var. aurelia of S. chrysis from Alaska. 



(31.) S. unicolor Tryon. A specimen so named is in the Binney 

 and Bland collection from New Orleans, La. It is a peculiar 

 shell, apparently of sect. Campestres, very globose, spire short 

 and blunt. 



(32.) S. turgida Westerl. This species is unknown to me ; it is 

 recorded in Land- och Sotv. Moll. Vega-Exped. 1885. 



(33.) S. deeampii Tyron. Belongs to Amphihince, and was acci- 

 dently omitted in the proper place. It is considered a form 

 of ovalis, but a specimen from Michigan (Tryon), in the 



