2 pr.()('Ei:f)ixGS oj^' the natioivtal museum vol. to 



plicae an irregular reticulation; suture deep but not channelled; 

 aperture subovate, the outer lip sharp, flexuous, patulously produced 

 medially; pillar lip thin, with a narrow umbilical chink behind it, 

 united with the outer lip by a thin layer of enamel over the body; 

 the umbilical chink is continued behind the inner lip by a kind 

 of shallow groove; height, 3; diameter, 2.5 mm. U. S. Nat. 

 Mus. Cat. No. 330S40. 



Dredged at station 2764, off Rio de la Plata in 11.5 fathoms, sandy 

 bottom by United ^States Bureau of Fisherias steamer Alhatro'<s; two 

 other specimens were obtained at station 2751, in 687 fathoiui? 

 globigerina ooze, bottom temperature 39° F. off St. Kitts, West Indies. 

 Cat. No. 330727. 



This little shell has features recalling Fossaru'<!, Lacuna, and Ris'<o- 

 ina. The specimens did not retain the operculum. It has somewhat 

 the aspect of CitJina cincta Jeffreys 



NATICA (STIGMAULAX; CUBANA, new species 



Shell small, whitish with a tinge of brown, of about four whorls ; 

 nucleus small, smooth, globular, subsequent whorls axially sculptured 

 with numerous radial grooves, rather strong at first but soon dwin- 

 dling to sharp narrow striae which pass entirely over the shell with 

 much wider interspaces; there is a very faint fine spiral striation 

 visible only in the grooves under a lens; suture distinct, not deep nov 

 glazed over; aperture semilunate; outer lip sharp, roundly arcuate, 

 with only a moderate thickness of enamel on the body; umbilicus 

 deep with a very large funiculum; operculum calcareous, white, with 

 a strong spiral rib externally in the middle of the surface and two 

 smaller ridges outside of it, the space inside the rib being smooth; 

 height, 5; diameter, 5 mm. U. S. Nat. Mus. Cat. No. 333745. 



Collected by the late J. B. Henderson, jr., on the shore at Guan- 

 tanamo, Cuba. 



This might be taken for the young of S. sulcata Born, but is not 

 canceilate and has the same number of whorls as a specimen of 

 sulcata 16 mm. high. 



CREPIDULA AROLA. new species 



Shell small, rather narrow, strongly arcuate, the right side spirally 

 slightly impressed; the apex marginal, strongly decurved, blackish, 

 not spiral; sculpture of close set, numerous, narrow, equal, longitudi- 

 nal, similar threads {'Auc probably to the sculpture of the situs), which 

 are found on all the specimens; transverse sculpture only of irregular- 

 ities of growth; basal color externally yellowish spotted with short 

 narrow streaks of a blackish purple; internally dark brownish purple 

 except the septum, which is white; extreme margin minutel}'^ spotted; 

 the anterior margin of the septum nearly straight; length of shell, 18, 

 breadth, 12; convexity, 6 mm. U. S. Nat. Mus. Cat. No. 364424. 



Collected near Cartagena, United States of Colombia, by T. A. Link. 



