PLEUKOCERA. 83 



inside, others are without bauds, and these are usually salmon-col- 

 ored within. Three of the specimens out of some thirty before me 

 are of a ricli dark brown, which arises from the interior nacre being 

 purplish. The aperture is more than one-third the length of the 

 shell. I have great pleasure in naming this after my friend W. D. 

 Hartman, M.D., who has furnished me with a number of fine spec- 

 imens.* — Lea. 



P. himttatum. — Shell smooth, conical, rather thick, yellow, double- 

 banded; spire obtusely conical; sutures much impressed; whorls 

 seven, rather convex, the last one large; aperture rather 

 large, somewhat rhomboidal, white and double-banded within, 

 outer lip acute, somewhat sinuous; columella thickened 

 below and very much twisted. 



Habitat. — Tennessee ; Prof. Troost. 



Diameter, -34 ; length, -GS of an inch. 



Observations. — This is a small robust species- Five specimens 

 came many years since from Prof. Troost, mixed with manj^ young 

 specimens of M. canaliciilata, Say, to which it has some rescrablancf, 

 but it may easily be distinguished by its shorter spire, and larger body- 

 whorl. All the specimens have two regular deep brown bands. Tin 

 aperture is about two-fifths the length of the shell. Two or three of 

 these specimens were mixed with some young shells from Cincinnati, 

 I think by accident, but still it is possible that they may have come 

 from Cincinnati. — Lea. 



Figured from Mr. Lea's plate. There can be no doubt that 

 this is the youug of Mr. Lea's Hartmanii. 



25b. P. Jayi, Lea. 



Trypnnostoma Jayi, Lea, Proc. Acad. Nat. Sci., p. 173, 1862. Jour. Acad. Xat. 

 Sci., V, pt. 3, p. 270, t. 3G, f. 81. Obs., ix, p. ti2. 



Description. — Shell smooth, pupaiform, tliick, shining, reddish- 

 brown; spire obtusely conical ; sutures very much impressed; wiiorls 

 eight, rather swollen, the last rather large; aperture small, rhora- 



• since tlie above was written, a letter received from Dr. Hartman says, that Dr. 

 Sliowalter Inlornieil lilni that "the orange color ot the animal is reniarlcablo." Dr. 

 Hartman also mentions that lie -.ukI Dr. Slunvnlter \\:\t\ dlstribnterl this slicU under the 

 name of Afe.lania pyre.nella. Con., wliicli mistake Dr. Hartman corrected by reference to 

 the type specimen, which is iu the collecliuu of tlie Academy of Natural Sciences.— iea. 



