DALL: MOLLUSCA AND BRACHIOPODA. 253 
sutural band which is much less prominent. The Z. Ainds¢i of Carpenter was 
published earlier than the species of the same name described by Deshayes and 
the latter was later re-named 7. bruguieri by Reeve. 
Terebra (Strioterebrum) bridgesi Da t, n. sp. 
Shell very small, livid purple, with a white peripheral broad band 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 strong, 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 band so that the two alternate; the inter- 
spaces on the band show about tliree, 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. Lon. of shell, 10.53 of last whovl, 
4.0; of aperture, 2.5; max. diam., 2.5 mm. 
Panama, Bridges. U.S. N. Mus. 9404. 
This is a remarkably distinct and peculiar little species, very uniform in color 
and sculpture, which was collected at Panama by the late Thomas Bridges and ac- 
quired by the Museum with the Stearns Collection. 
Terebra (Perirhoé ?) stylus Da t, n. sp. 
Shell with the extreme tip defective but having about sixteen subsequent 
whorls remaining, of a uniform pale. yellowish brown, not far from straw 
color; axial sculpture only of sigmoid incremental lines; 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 finely spirally closely threaded ; these spiral threads 
are hardly visible without a lens; aperture semilunate, short, a glaze on the body 
and pillar; canal very short, constricted, and recurved, a keel behind the fasciole 
not continued on the pillar. Lon. of shell, 29; of last whorl, 7: of aperture, 4; 
max. diam., 5 mm. 
Panama Bay, Stearns, U. 8. N. Mus. 32,773. 
This species approaches 7. laevigata Gray, but has longer whorls and a less 
prominent and conspicuous presutural band. 
