VITRINA. 33 



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

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



SYNONYMS AND REFERENCES. 



Vitrina Angelica, BECK, Index, p. 1 (absq. desc.) 



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

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

 MORCH nat. Bidr. af Gron. p. 75 (absq. desc.) 



Helix pdlucida 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. Descriptioneni hujus 

 exactissimam ap. Mull, de Verm. 1. c. habemus. Vertex in meis omnibus 

 albus, reliquum testse albidovirescens. Anfractus maximus verticaliter 

 plures strias subtiles subeminentes habet, ad suturam notabiliores. 



VITRINA LJMPIDA GOULD vol. ii. p. 58, pi. Ixvii. a, fig. 1. 



Vitrina pelludda DEKAY, N. Y. Moll. p. 25, pi. iii, fig. 4, 5 a. b. 



STIMPSON Shells of N. E. p. 55, (absq. descr.) Say (Binney) 



p. 31. 



Vitrina Americana PFEIFFER, Dec. 1852, Proc. Zool. Soc. p. 156. 

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



Vitrina limpida 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 That author has since withdrawn his name 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. 



