VITRINA. 33 



simplex, subinflexum, inarglne columellari non recedente, leviter arcu- 

 ato. Diam. maj. 6 ; min. 4| ; alt. 3^ mill. [Pfeiffer]. 



SYNONYMS AND REFERENCES. 



Vitriiia Angelicce, Beck, Index, p. 1 (absq. desc.) 



MoLLER, Index Moll. Grcenl. p. 4, (teste Pfr.) 

 Pfeiffer, Mon. Hel. Viv. ii. p. 510. 

 MoRCH nat. Bidr. af Gion. p. 75 {absq. desc.) 



Helix pellucida Fabricius, Fauna Groenl. p. 389, excl. Syn. Miiller. 



Helix domestica Strom, Der Tronh. Vidensk. &c. vol. iii. p. 435, tab. vi. 

 fig. 15, (teste Fabricius). 



Geographical Distribution. Found in Greenland. Arch- 

 angel (Fabricius). 



Remarks. " Closely resembling V. pellucida, being scarce- 

 ly distinguished by the more rapidly enlarging whorls, and 

 the form of the aperture." (Pfeiffer, 1. c.) I have not seen 

 this species. The figure I have given was drawn from 

 a specimen in Mr. Cuming's collection. 



Fabricius referred this species to V. pellucida Miiller. 

 His description is given below. I have not been able to 

 obtain access to Strom's description. 



Helix pellucida (Fabricius, 1. c.) Helix testa imperforata, de- 

 pressiuscula nitida, subvirescente, anfr. tribus. Descriptionem hujus 

 exaetissimam ap. Miill. de Verm. 1. c. habemus. Vertex in meis omnibus 

 albus, reliquum testae albido-virescens. Anfractus maximus verticaliter 

 plures strias subtiles subeminentes habet, ad suturam notabiliores. 



VITRINA LIMPID A Gould vol. ii. p. 58, pi. Ixvii. a, fig. 1. 



Mtrina pellucida DeKay', N. Y. Moll. p. 25, pi. iii. fig. 4, 5 a. b. 



Stimpson Shells of N. E. p. 55, (absq. descr.) Saj' (Binney) 

 p. 31. 

 l^trina Americana Pfeiffer, Dec. 1852, Proc. Zool. Soc. p. 156. 

 Chemnitz, ed. 2, p. 9, pi. i. fig. 22-25, (1854). 

 Vitrina Umpida Gould, in Agassiz, Lake Superior, p. 243, 1850. Terr. Moll. 1. c. 

 Pfeiffer, Malac. Blatt. ii. p. 10, (1856). 



In 1850 this species was declared to be distinct from the 

 European V. pellucida by Gould. In 1852 a description 

 of it was published by Pfeiffer under the name of V. 

 Americana. That author has since withdrawn his name 

 in favor of Gould's. 



