dall: mollusca A^'D brachiopoda. 253 



sutural band wLich is much less prominent. The T. hindsii of Carpenter was 

 published earlier than the species of the same name described by Deshayes and 

 the latter was later re-named T. bruguieri by Keeve. 



Terebra ( Strioterebrum) bridges! Dall, n. sp. 



Shell very small, livid purple, with a white peripheral broad baud and the more 

 prominent portions of the axial sculpture more or less whitish; with about three 

 smooth coniform glassy nepionic whorls, and nine or more subsequent sculptured 

 whorls ; penultimate whorl with about twelve stroi^g, short, rounded, whitish ribs 

 which have wider interspaces and become obsolete at the periphery of the shell ; 

 the sutural band is very distinct, set off by a strongly constricted sulcus, while the 

 whorl in front is rounded and more prominent than the band; the latter is simi- 

 larly ribbed, but the ends of the ribs on the body of the whorl meet the band at 

 the interspaces between the ribs on the baud so that the two alternate ; the inter- 

 spaces on the band show about three, and the rest of the whorl between the sulcus 

 and the suture about five or six sharply incised grooves which do not cross the 

 ribs ; the base is similarly sculptured with rather distant grooves ; aperture ample, 

 outer lip thin, sharp, inner lip bare, canal reduced to a wide, short sulcus, the fas- 

 ciole obscure, the pillar with one obscure plait. Lou. of shell, 10.5 ; of last whorl, 

 4.0; of aperture, 2.5; max. diam., 2.5 mm. 

 Panama, Bridges. U. S. N. Mus. 940i. 

 " This is a remarkably distinct and peculiar little species, very uniform iu color 

 and sculpture, which was collected at Panama by the late Thomas Bridges and ac- 

 quired by the Museum with the Stearns Collection. 



Terebra (Perirhoe?) stylus Dall, n. sp. 



Shell with the extreme tip defective but having about sixteen subsequent 

 whorls reuiaining, of a uniform pale yellowish brown, not far from straw 

 color ; axial sculpture only of sigmoid incremental Hues ; spiral sculpture con- 

 sisting of a moderately prominent presutural band, divided by an incised line at 

 its anterior third, giving somewhat the effect of a double band ; in front of this 

 are about seven fine spiral threads with narrower interspaces ; on the last whorl 

 these threads appear uneven, some being stouter than others ; the periphery is 

 obscurely subangular, the base fmely spirally closely threaded ; these spiral threads 

 are hardly visible without a lens ; aperture semiluuate, short, a glaze on the body 

 and pillar ; canal very short, constricted, and recurved, a keel beiiiud the fasciole 

 not continued on the pillar. Lou. of shell, 29 ; of last whorl, 7 : of aperture, 4 ; 

 max. diam., 5 mm. 



Panama Bay, Stearns, U. S. N. Mus. 32,773. 



This species approaches T. laevigata Gray, but has longer whorls and a less 

 promiuent and conspicuous presutural band. 



