286 jRemarks on Certain Species of . 



not readily met with in the United States, and I should add 

 were not accepted by Pfeiffer in 1856 (vid. Malak. Blatt.). 

 Helix fattgiata Say. 



"T. spurie umbilicato-perforata, superne plana, subtus inflato-convexa, 

 acute carinata, plicato-striata, striis subtus exilioribus, corneo-rufescens, 

 superne obscura, subtus nitidula ; anfr. 6$* lente accrescentes, plani, 

 ultimus ad aperturam brevissime deflexus et scrobiculato-constrictus, 

 basi devius ; sntura satis profunda ; apertura subreniformis, valde coarc- 

 tata ; perist. albidum, reflexura, niarginibus dente triangulari linguiformi 

 profunde intrante junctis, dextro dente valido profunde immerso, basali 

 dente minore subinarginali rnunito. 



"Diam. maj. 10, min. 9 ; alt. 3 mill. 



"Syn. Polygyra fatigiata Say Descr. of some new Terr, and Fluv. 



Shells of N. Amer. p. 1. No. 3. 

 "Helix Dorfeuilliana Desh. in Fer. Hist., I. p. 13, et tab. 69 D. fig. 3. 



"Hab. Spec, ultra 12 e Tennessee misit Lequereux : 



"Obs. Sub nomine H. Texasianse 3 species a cl. Pfeiffer confuse sunt. 



" 1. H. fatigiata Binn., quae ad H. Troostianam Lea (H. plicata Say), 

 pertinet. 



"2. H. fatigiata Say, supra descripta. 



"3. II. Texasiaua Mor., ad quam forsan'tantum var. y pertinet. Figura 

 Kusteriana (Cbemn., ed. 2. tab. 10. f. 11-12), ab H. Texasiaua Mor., 

 secundum exemplaria authentica in collectione Cbarpenteriana conser- 

 vata, omnino abborret, aut II. Troostiana mala delincatio, aut species 

 inihi omnino ignota est. H. Texasiana Mor. non valde ab II. Hindsi 

 Pfr.. discrepat. H. fatigiata Say differt ab H. Troostiana Lea, testa 

 .superne plana, acute carinata, diraensionibus majoribus, et dente supero 

 raajore et magis conspicuo : ab II. Texasiana Mor. testa superne plana, 

 carinata et dente supero profunde immerso, nee superficialiter in margine 

 peristomatis sito." 



H. fatigiata Say is larger than Troostiana Lea, plicata Say, 

 and Dorfeuilliana Lea; it is most nearly allied to the first, and 

 through it is connected with the second, but wholly distinct from 

 the last. The parietal tooth is more rectangular than that of 



