ART. 18 SMALL SHELLS DREDGED BY ** ALBATROSS ' ' DALL 19 



CADUUIS OBESUS Watson 



Cadulus obesus Watson, Journ. Linn. Soc. London, vol. 14, p. 527, 1879; 

 Challenger Scaphopoda, p. 22, pi. 3, fig. 8, 1885. — Henderson, Bull. U. S. 

 Nat. Mus. Ill, p. 146, pi. 20, fig. 8, 1920. 



Off Fernandina. Bahia Honda, Cuba, in 200 fathoms, United 

 States Fish Commission. Off Culebra Island in 390 fathoms; Watson. 



CADULUS PLATENSIS Henderson 



Cadulus platensis Henderson, Bull. U.S. Nat. Mus. Ill, p. 147, pi. 20, fig. 

 14, 1920. 



Off Georgia and Fernandina. Off Ceara, Brazil, in 1,019 fathoms, 

 temperature 39.5° F., and off Rio de la Plata in 11 3^ fathoms, United 

 States Fish Commission. 



This is C. tumidosus Dall, 1889, not of Jeffreys, 1877. 



GASTROPODA 



TECTIBRANCHIATA 



Family ACTEONIDAE 



Genus ACTEON Montfort 



ACTEON DANAmA Dall 



.Adaeon danmda Dall, Bull. Mus. Comp. Zool., vol. 9, p. 96,1881; vol.18, 

 p. 42, pi. 17, fig. 12, 1889. 



Off Fernandina. Also off the Tortugas in 339 fathoms, tempera- 

 ture 45° F. 



ACTEON INCISUS Dall 



Actaeon incisus Dall, Bull. Mus. Comp. Zool., vol. 9, p. 95, 1881; vol. 18, 

 p. 42, pi. 17, figs. 1, 16., 1889. 



Off Fernandina, 10 specimens. Yucatan Strait, 640 fathoms. 



ACTEON HEBES Verrill 



Actaeon hehe.^ Veruill, Trans. Conn. Acad., vol. 6, p. 428, pi. 44, fig. 15, 

 1S85. 

 Off Georgia, two young specimens. Off North Carolina in 2,574 

 fathoms, temperature 36.8° F. 



ACTEON SEMICINGULATA new species 



Shell small, translucent white, with a blunt immersed apex and 

 about four visible whorls; surface finely spirally striated on the an- 

 terior half of the last whorl; suture distinct, very slightly shouldered; 

 whorls moderately rounded, the last twice as long as the spire; aper- 

 ture sublunate, slightly produced in front; outer lip thin, sharp, 

 moderately arcuate; pillar lip thin with a hardly perceptible fold; a 



