10 Bemarhs 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, supcrne plana, subtus inflato-convexa, 

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

 superne obscura, subtus nitidula ; anfr. C|-, lente accrescentes, plani, 

 ultimus ad aperturam brevissime deflexus et scrobiculato-constrictus, 

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

 tata ; perist. albidum, reflexum, marginibus dente triangulari linguiformi 

 profunde intrants junctis, dextro dente valido profunde imraerso, basali 

 dente minore submarginali munito, 



"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.iu Fer. Hist., I. p. 73, et tab. 69 D. fig. 3. 



^'■Hab. Spec, ultra 12 e Tennessee misit Lequereux : 



"06s. Sub nomine H. Texasianae 3 species a cl. Pfeiffer confusso sunt. 



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

 pertinet. 



"2. H. fatigiata Say, supra descripta. 



"3. H. Texasiana Mor., ad quam forsan tantum var. y pertinet. Figura 

 Kasteriana (Chemn., ed. 2. tab. 10. f. 11-12), ab H. Texasiana Mor., 

 secundum exemplaria authentica in collectione Cliarpenteriana conser- 

 vata, omnino abhorret, aut H. Troostiante mala delineatio, aut species 

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

 Pfi'. discrepat. H. fatigiata Say differt ab H. Troostiana Lea, testa 

 superne plana, acute carinata, dimensionibus majoribus, et dente supero 

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

 carinata et dente supero profunde imjnerso, 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 



