308 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
pervious; canal short, wide, shallow, with a strong, conspicuously wrinkled 
siphonal fasciole. Lon. of shell, 20.0; of last whorl, 13.5; of aperture, 9.0; 
max. diam. 11.5 mm. 
U. S. S. “ Albatross,” station 3355, Gulf of Panama, in 182 fathoms, mud, 
bottom temperature 54°.1 F. U.S. N. Mus. 123,014. Also at stations 3354, 
3387, 3389, 3391, 3396, and 3422, in 141 to 322 fathoms, mud or sand, bottom 
temperatures from 46° to 56°.2 F., the range extending from the Gulf of Panama 
to the vicinity of Acapulco, Mexico. 
Alectrion (Tritia) exsarcus Datt, n. sp. 
Plate 11, figure 12. 
Shell small and rather slender, with three and a half nuclear and the same num- 
ber (or more) of subsequent whorls; color pale yellowish with two pale, reddish 
brown, narrow bands, so applied that when the suture is formed there is a brown 
band near and on each side of it; nucleus large, the visible portion having a tur- 
binate aspect, smooth and polished ; subsequent whorls reticulated, with a distinct 
but not channelled suture ; axial sculpture of (on the last whorl sixteen) strong, 
vertical, rounded ribs, which entirely cross the whorls and have a particular promi- 
nence (ill-defined) just in front of the suture; lines of growth feeble, surface pol- 
ished, periostracum thin, yellowish ; these ribs are crossed by (on the penultimate 
whorl five or six, on the last whorl fourteen) strong, rounded, somewhat flattened 
spiral threads, of which the second in front of the suture is a trifle larger than the 
others and may be articulated with brown and white; these threads are not nodu- 
lous, but become a little turgid when they cross the ribs, and are separated by sub- 
equal, or, on the base, slightly wider flattish interspaces ; aperture ovate, the outer 
lip thin (possibly when older varicose ?), with eight or nine lirae internally ; inner 
lip with a thin, smooth coat of callus ; pillar short, its anterior margin keeled and 
twisted ; canal short, recurved, proximally constricted ; siphonal fasciole distinct, 
- with a strong keel behind. Length of shell, 9.0; of last whorl 5.5; of aperture, 
3.25 ; max. diam. 4.5 mm. 
U.S. 5. ‘ Albatross,” station 4642, near the Galapagos Islands, in 200 fathoms, 
ooze, bottom temperature 48°.6 F. U.S. N. Mus. 110,565. 
The operculum is normally nassoid. With this specimen were dredged some 
gorgonian cores supporting rows of nassoid ovicapsules probably belonging to 
this species. They are spatuliform, flat, with a small peduncle, the sides chan- 
nelled, the lateral and upper edges projecting and, above, somewhat wavy or 
denticulate. They were about a millimeter and a half in height and somewhat 
less in width. 
Alectrion (Tritia?) goniopleura Datt, n. sp. 
Shell small, decollate, immature, comprising three whorls, rather rapidly en- 
larging, straw-color, with a slight brown band at the shoulder; suture deep, not 
