ART. 18 SMALL SHELLS DREDGED BY " ALBATROSS '' DALL 113 



Shell small, thin, white, elevated, with a small recurved apex, the 

 anterior slope convexly arcuate, the posterior shorter and somewhat 

 concave; the foramen circular, small; the internal septum obliquely 

 set, with no indication of a nuclear whorl; sculpture of more or less 

 divaricate quincuncially arranged conspicious granules on a smooth 

 polished surface; margin entire, ovate, interior polished. Length, 3; 

 breadth, 2.5; height, 4 mm. U. S. Nat. Mus. Cat. No. 108153. 



Off Fernandina, eight specimens. Coast of Yucatan, 200 fathoms; 

 United States Bureau of Fisheries. Off Culebra Island, in 390 

 fathoms, Challenger expedition. Bay of Campeachy, 200 fathoms; 

 Henderson. 



The Fernandina specimens are somewhat more slender than those 

 from Yucatan. 



Genus EM ARGINULA Lamarck 



Subgenus Rimula Defrance 



EMARGINULA (RIMULA) LARVA, new species 



Shell minute, long-ovate, white, with a glassy beadlike nucleus and 

 an enrollment of about one whorl; the apex nearly terminal at the 

 posterior end; anterior slope convexly arched, slit about half as long 

 as the shell, narrower in front, the scar extending backward the whole 

 length of the shell ; sculpture of more or less crowded fine granulate 

 radial lines with lines of granules in the interspaces; margin entire, 

 interior polished, the scar of the slit appearing as a rounded ridge; 

 the nucleus is a little prominent on the right side of the spire. 

 Length, 3; breadth, 2.3; height, 1 mm. U. S. Nat. Mus. Cat. No. 

 108148. 



Off Fernandina, 3 specimens. 



Subgenus Emarginula s.s. 



EMARGINULA CANCELLATA Phllippi 



Emarginula cancellata Philippi, Moll. Sicil., vol. 1, p. 114, pi. 5, fig. 15, 

 1840.— Dall, Bull. Mus. Comp. Zool., vol, IS, p. 406, 1889. 



Off Fernandina, four broken specimens, apparently of this species. 

 Mediterranean, Philippi. Off Cuba in 127 to 287 fathoms. Off 

 Barbados, in 100 fathoms; Blake expedition. 



EMARGINULA COMPRESSA Cantraine 



Emarginula compressa Cantraine, Bull. Acad. Roy. do Bruxelles, vol. 9, p. 

 2, 1881.— Jeffreys, Proc. Zool. Soc. London, for 1882, p. 679, 1883.— 

 Dall, Bull. Mus. Comp. Zool., vol. 18, p. 406, 1889. 



Off Georgia, two fine specimens of this species. Coast of Portugal 

 and the Mediterranean. Yucatan Strait and eastward to the Lesser 

 Antilles, in 81 to 640 fathoms. 



