98 THE NAUTILUS. 



impressed revolving punctures and by being broader and much 

 heavier. 



The ribs are almost obsolete in young specimens. Type is in 

 my collection. Examples in National Museum. 



Cypraea Dalli n. sp. PI. 4, fig. 2. 2 a. 



Shell ovate, moderately elevated, surface highly polished, 

 crossed above by a number of lines not closely set, dividing the sur- 

 face into a series of facets, base veutricose ; labrum very much 

 thickened, profoundly striated but the striations do not extend up 

 over the whole surface. Teeth on outer lip alternate. The smaller 

 ones half the length of the others ; aperture narrowed in some speci- 

 mens in the centre, in others regular and strongly denticulated. 

 Length 15 mm. ; width 12 mm. ; alt. 9 mm. 



This shell is also found at Jackson, Miss. It resembles C. lintea 

 Con., and has been considered as that species. It is however larger, 

 with a more thickened labrum on which the striations do not reach 

 the body of the shell as in Conrad's species, but stop half way; the 

 surface of this shell is very different. In C. lintea the surface is 

 completely covered with close-set, very fine lines, while this species- 

 has but few, and they are not impressed, some specimens being 

 smooth. The type retains some color, showing the shell to be choco- 

 late brown above with the lip white ; C. lintea Con. is figured in my 

 Preliminary Rejyort, PI. V, fig. 2, p. 32, 1886. 



Conrad's original description contains a misprint which seems to 

 have been perpetuated in later publications. It should read " with 

 fine approximate equal impressed lines," instead of "four . . 

 lines." Type in National Museum ; examples in my collection. 

 Pleurotoma Clarkeana n. sp. PL 4, fig. 3. 



Shell rather solid, fusiform, whorls about nine, spire smooth (?), 

 whorls with about eleven strongly raised and rounded ribs crossed 

 by coarse revolving lines ; somewhat alternate. The finer lines be- 

 tween often being double, especially upon the body whorl. Suture 

 appressed, bordered by a corded thread, and this in turn by a con- 

 cave space. Aperture obloug-oval. Canal short. Sinus semi- 

 circular, and well up in the aperture. Length 31 mm. ; breadth 

 11 mm. 

 Murex (Pteronotus) Burnsii n. sp. PI. 4, fig. 4, 4a. 



Shell large, with three foliated varices, whorls nine. Nucleus 

 pointed, smooth ; whorls convex, appressed at suture, whorls fol- 



