58 HELICEA. 



SYNONYMS AND REFERENCES. 



Helix odstricta SAY (Binney's ed.) p. 17. 



PFEIFFER, Mon. Hel. Viv. i. 317; ill. 267. 



REEVE, Con. Icon. No. 683, (1852). 

 Helix palliata var. a SAY (Binney's ed.) p. 16. 



Var. a b DF.KAY, N. Y. Moll. p. 33, pi. ii. fig. 16. 



Var. BINNEY, 1. c. 



Helix appressa var. DESHAYES in Fer. (in tab. non in lextu.) 

 Hdicodonta denotata var. FERUSSAC, Tab. Syst. 38; Hist. pi. L. A. fig. 7, absq. desc. 

 Caracolla helicoides LEA, 1. c. 



Remarks. This species is considered by Say, Binney, 

 and DeKay as a variety of the preceeding. It appears 

 to me, however, sufficiently constant in its characteristics 

 to be considered distinct. 



I have added to the synonymy of this species H. pal- 

 liata var. a Say. His description seems to agree with 

 that of obstricta given above. 



Var. a. A very prominent acute carina; destitute of minute 

 prominences. Inhabits Ohio. Breadth nearly one inch. 



Ferussac figured this species, 1. c., without describing it. 

 In Deshayes's continuation of the Histoire no mention is 

 made of it, the figure being erroneously referred to H. ap- 

 presa var. in the explanation of the plates. 



As regards Caracolla helicoides, I think there can be no 

 doubt of its identity with obstricta. Specimens received 

 from Mr. Lea under this name are, however, furnished 

 with the " minute protuberances r which Say describes 

 as not present on obstricta. I believe they are not con- 

 stant. Ferussac says that Caracolla helicoides is the same 

 as the carinated variety of palliata (Bull. Zool., 1835, 2, 

 p. 100). His figure is certainly the same as that of Lea 

 and Reeve. Say declares Caracolla helicoides to be the 

 same as his palliata var. a (Binney's ed. p. 36). 



Anthony (Ohio Cat.) places obstricta, Carolinensis and 

 helicoides in the synonymy of palliata. Pfeiffer considers 

 helicoides a synonym of obstricta. In the Boston Journal, 



