306 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
PHOS Montrort. 
Phos cocosensis Datt. 
Plate 8, figure 5. 
Phos cocosensis Dall, Proc. U. S. Nat. Mus., 1896, 18, p. 11. 
Shell elongate, acute, eleven-whorled, including a nucleus of four whorls; color 
yellowish-white, with variable brown spiral banding; sculpture of eleven or twelve 
narrow, little elevated, distant ribs, more or less angulated at the shoulder; spiral 
sculpture of numerous rather sharp, close threads, flatter on the last whorl, with a 
few more prominent between the suture and the shoulder; suture distinct, whorls 
moderately rounded ; aperture longer than wide, with an entire outer lip, slightly 
thickened and internally lirate; throat white, pillar with a groove near its anterior 
edge ; canal short, deep; siphonal fasciole moderate; body with a thin white 
callus. Height, 47; last whorl, 28; diam. 19 mm. 
The operculum is smooth-edged, nearly as in Fusinus, with apical nucleus. 
U.S. 8. “ Albatross,” station 3368, near Cocos Island, Gulf of Panama, in 66 
fathoms, rocky bottom, temperature 58°.4 F. U.S. N. Mus. 123,010. Also at 
station 3387, in 127 fathoms, sand, bottom temperature 56°.2 F. 
This species is nearest to Phos beaui Crosse and Fischer, of the West Indies, 
but is larger and further differs by the strong and regular ribs. 
Alectrionidae. 
ALECTRION Montrort. 
Alectrion Montfort, Conchyl. Syst., 1810, 2, p. 565; type, Buccinum papillosum 
Linné. 
Nassa Lamarck, Prodrome, 1799, p. 71; type, Buccinum mutabile Linné; not Nassa 
Bolten, Mus. Bolt., 1798, p. 182 (= Purpura Lamarck, 1799, not Martyn, 
1784). 
Hima (Leach) Gray, 1847, Moll. Gt. Brit., 1852, p. 123; type, Nassa incrassata 
Lamarck. 
Tritia Risso, Hist. Eur. Mérid., 1826, 4, p. 172, note; Gray, P. Z. S., 1847, p. 139; 
type, Buccinum reticulatum Linné. 
Tritonella A. Adams, 1853, not Swainson, 1840. 
Hima Leracu. 
Shell reticulate, with a callus on the inner lip; the outer lip varicose and in- 
ternally lirate or denticulate. 
