PROCEEDINGS OF THE NATIONAL MUSEUM. 13 



TRACTOLIRA SPARTA, new species. 



Shell elongate, sleuder, with a greenish or ashj- adherent epidermis 

 (more or less eroded near the apex in all the specimens), and about six 

 whorls; nucleus ap]>arently as in Seaphella, large, with an a]>ical s])nr- 

 Avhorls drawn out, rounded, with a distinct suture, the upper whorls at 

 tirst smooth, then with irregular, partly obsolete, transverse wrinkles, 

 some of which cross the whorl, but which are too irregular to call ribs- 

 surface every where sculptured with numerous, even, fine, Hattish si)iial 

 threads, with equal or slightly wider interspaces, and with well marked 

 but not regular lines of growth; aperture subovate, rather wide in 

 front, the outer li]) simple and hardly thickened; the throat white, a 

 thin wash of callus on the body, the ])illar thin, pervious, short; the 

 canal short and wide, with hardly any siphonal fasciole; operculum 

 absent. Height of shell, GO; of last whorl, 43; of aperture, 28; diam- 

 eter, 19 mm. 



V . y. Fish Commission stations 330(», 3374, 3414 and 3415, in 1,072 

 to 2,232 fathoms. Gulf of Panama, to Acapulco, IMexico. 



Type.— No. 122999, U. S. N. M. 



This is a very characteristic and singular abyssal shell. 



SCAPHELLA BENTHALIS, new : pecies. 



Shell recalling S. mageJlanicaj Boyvev\)y; l)ut stouter, with more 

 rounded whorls, the aperture shorter and wider, with a broad flexure 

 where the lip turns to meet the body whorl, while in iS. magellanlca 

 the posterior part of the aperture is i)ointed; the latter has two strong 

 plaits on the pillar; S. henthaUs has three, all obsolete, the middle one 

 most perceptible, and has a less marked canal and siphonal fasciole. 

 The interior of the aperture is pale flesh color; the exterior seems to 

 have been like that of t^. mageUatiiea, but is almost entirely decorti- 

 cated. It has five whorls beside the nucleus, and there is no oper- 

 culum. Height, 125; of the last whorl, 90; of the aperture, 70; width 

 of the aperture, 35; of the (decorticated) shell, 00 mm. 



U. S. Fish Commission station 3300, in 1,072 fathoms, sand, in the 

 Gulf of Panama; temperature at bottom, 42° F, 



At first sight one would be disposed to think that this specimen 

 represented a northward extension by 3,300 miles of the Magellanic 

 species, but a more careful examination shows luimerous points of 

 difference. 



CANCELLARIA CENTROTA, new species. 



Shell solid, short, ashy or pinkish white, with a smooth, small nucleus 

 of two whorls, and five and a half strongly s('ul[)tured s(ii)sequent 

 whorls; spire subtabulate, rather pointed; sculpture of five or six 

 strong spiral threads, of which that at the shoulder is much the largest, 

 crossed by (on the last whorl nine) sharp, recur\ed varices, spiny at the 



