306 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



PHOS MONTFOKT. 



Phos cocosensis Dall. 



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 augulated at the shoulder ; spiral 

 sculpture of numerous rather sharp, close threads, Hatter 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 Urate ; 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. S. "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. % 



Alcdrionidae. 



ALECTRION MoNTFORT. 



Alectrion Montfort, Conchyl. Syst., 1810, 2, p. 565; type, Buccinum papillosum 



Linne. 

 Nassa Lamarck, Prodrome, 1709, p. 71; type, Buccinum mxitabile Linn^; not Nassa 



Bolten, Mus. Bolt., 1798, p. 132 (= Purpura Lamarck, 1799, not Martyn, 



1784). 

 Hima (Leach) Gray, 1847, Moll. Gt. Brit., 1852, p. 123; type, iVasaa incrassata 



Lamarck. 

 Tritia Risso, Hist. Eur. Me'rid., 1826, 4, p. 172, note; Gray, P. Z. S., 1847, p. 139; 



type, Buccinum reticulatum Linne'. 

 Tritonella A. Adams, 1853, not Swainson, 1840. 



Hima Leach. 



Shell reticulata, with a callus on the inner lip ; the outer lip varicose and in- 

 ternally Urate or denticulate. 



