pupa. 199 



Pupa Hoppii, Moller, Ind. Moll. Gr., 4 (1842). — Troschel, Arch. f. Nat., 



1843, II. 1*26. —Chemnitz, ed. 2, 163, PI. XIX. Figs. 29, 30. — Pfeiffer, 



Mon. Hel. Viv.. II. 328 ; III. 536 ; IV. 666. — W. G. Binney, 



' Fig. 102. 



Terr. Moll., IV. 147. — MbRCH, Amer. Journ. Conch., IV. 30, 



PL III. Figs. 6-9 (1868). — W. G. Binney, L. & Fr.-W. Sh., I. 



235 (1869). 

 Pupa Stecnbuchii, Beck, teste Moncii, Nat. Bidrag af Gr. 75. 

 Pupilla Hoppii, Tuyon, Amer. Journ. Conch., III. PI. 4, p. 303. 



Inhabits G reenland, and has also been found at Anticosti Island. 

 It is therefore a species of the Northern Region. 



The description given above is translated from Pfeiffer. The 

 specimen figured, which I refer to this species, has another denticle on the col- 

 umella, and a lamina-like process within the aperture at the base of the last 

 whorl. 



Full information on the species is given by Mdrch, 1. c. He describes the 

 animal as grayish, foot bluish-gray; head, eye-peduncles, and mantle margin 

 black ; eye-peduncles rather long ; tentacles none or nearly none ; the foot a 

 little shorter than the shell. He refers also to an albino variety, destitute of 

 epidermis. 



Jaw, dentition, and genitalia unknown. 



Pupa variolosa, Gould. 

 Vol. HI. PI. LXXII. Fig. 3. 

 Shell minute, ovate-conical, with a pointed apex, of a yellowish-green color, 

 apparently smooth, but when examined by a considerable magnifying power, is 

 found to be thickly pitted with dots of unequal size and irregularly disposed ; 

 there are 4 or 5 narrow, tumid whorls, separated by a profound suture ; the aper- 

 ture is obliquely semi-oval, and has a posterior lamellar tooth winding within the 

 shell, a tooth on the columella, and another a little to the right of the basal 

 apex ; a small umbilical opening is covered by the reflected columellar margin 

 of the peristome, and the other margin is slightly everted. Length, 2 mill. ; 

 diameter, 1 mill. 



Pupa variolosa, Gould, Proc. Bost. Soc. Nat. Hist., III. 40 ; Terr. Moll., II, 331, 

 PI. LXXII. Fig. 3. —Pfeiffer, Mon., Hel. Viv., III. 556. — W. G. Binney, 

 Terr. Mull., IV. 146 ; L. k Fr.-W. Sh., I. 236 (1869). — Tryon, Amer. Journ. 

 Conch., III. 303 (1868). 



Florida Subregion, on the extremity of the peninsula. 



This species is our smallest, and is most readily distinguished by its short, 

 conical form. The five specimens examined all presented the crowded, thim- 

 ble-like impressions, under a magnifying power of twenty diameters. It is the 

 only American species which has a tooth revolving within the shell, on the 

 penultimate whorl. 



Animal unobserved. 



