29 



a rounded ande with the labrum and the labium : labrura hardly 

 reflected ; umbilicus narrow. 



Length more than three-tenths of an inch. For this species I 

 am indebted to Dr. T. W. Harris, of IMilton, Massachusetts. 



It closely reseuibles P. marginata, A^ob., but is much larger, and 

 the labrum is not widely reflected. When viewed in front it has a 

 reflected appearance, but the opposite view presents only a very 

 limited escurvature. 



AcHATiNA SOLIDA. — Shell conic, rather elongated, nearly 

 smooth, or with distant wrinkles, polished, yellowish, paler 

 towards the apex, which is white ; rather ponderous ; whorls 

 about seven ; spire prominent ; mouth rather small ; labrum on its 

 inner submargin thickened ; columella hardly truncated, with a 

 somewhat prominent ridge on the inner side near the base. 



Length two and a half inches. This species was found by Mr. 

 Titian Peale in the southern part of East Florida, where he also 

 obtained the A. jiammigera, Fer., and vexillum, Humph., or their 

 analogues, in plenty. In outline it bears some resemblance to 

 Lister's fig. 9, of plate 14, but is much smaller. It appears to be 

 rare, but one specimen having been brought home by Mr. Peale. 



Cyclostoma dentatum. — Shell conic, cylindric, truncate at 

 tip ; whorls three or four, slightly convex, cancellate, with fine, 

 regular, subequal, longitudinal, and transverse elevated lines; 

 superior edge fimbriated, with prominences extending over the 

 suture ; one or more rufous revolving lines, sometimes obsolete j 

 labrum somewhat reflected, white ; umbilicus distinct. 



Length less than one-half inch. 



For this species we are indebted to the researches of Mr. T. 

 Peale in Florida. It is the only true species of Cyclostoma yet 

 found within the limits of the Union. This species is somewhat 

 like the Turbo crenatus, Linn., but that shell is not said to be 

 truncated at tip, and has a keeled base. 



No. 3. — In the Appendix to Long'f Second Expedition to tlie St. Peter's River, the fol- 

 lowing species were described, anno, 1824. 



Helix harpa. — Shell conic, reddish brown ; whorls four, 

 convex, with numerous elevated, subequidistant, equal, lamelli- 

 form, acute lines across, the interstitial spaces flat and wrinkled ; 

 aperture suborbicular, truncated by the penultimate whorl, and 



