CUBAN ANNUlJARIIDAE — TORRE AND BARTSCH 169 



OPISTHOSIPHON (BERMUDEZSIPHONA) CUCULLATUM, new species 



Plate 12, Figure 7 



Shell elongate-ovate, pale yellow with faint interrupted spiral bands 

 of brown. Nuclear whorls 1.5, small, inflated, strongly rounded, 

 microscopically granulose, forming an almost cylindric, truncated apex. 

 Postnuclear whorls well rounded, the first marked by slender, rather 

 closely spaced, hairlike, decidedly retractively slanting axial ribs. On 

 the succeeding turns these ribs become more distantly spaced and they 

 develop into slender lamellae, which again become less highly elevated 

 and more rounded toward the last whorl. On the early whorls these 

 ribs are finely scalloped. On the later turns this sculpture disappears. 

 On all the turns the ribs become expanded at the summit into narrow 

 cusps, which extend across the suture to touch the preceding turn. Of 

 these ribs 48 occur upon the last whorl in the type. The spaces sepa- 

 rating the axial ribs are much wider than the ribs and are marked 

 by slender, somewhat sinuous axial tlireads; they are free of spiral 

 sculpture. The suture, wliile well impressed, is rendered less con- 

 spicuous by the cusps of the ribs at their summit. Periphery well 

 rounded. Base short, marked by the continuation of the axial ribs 

 and within the exposed portion of the umbilicus by 3 spiral tlireads, 

 which render the axial ribs decidedly scalloped at their junction. 

 Aperture broadly oval, almost subcircular; peristome double, the inner 

 erect and slightly exserted, the outer broadly expanded, the expanded 

 portion also erect or even inbent partly over the aperture, forming a 

 decided hoodlike auricle at the posterior angle. On the inner lip the 

 outer peristome is deeply notched and the portion posterior to the 

 notch is reflected over the umbilicus, which it plugs ; the plug appears 

 decidedly pinched in. On the parietal wall the outer peristome is 

 reflected over the preceding turn. The outer peristome is covered 

 with slender, concentric laminae. The operculum is tj^pically opis- 

 thosiphonid. The siphon is short and directed into the suture and 

 commimicates through the channel behind the parietal lip ^vith the 

 hollow axis of the shell, breathing being accomplished through the 

 hollow axis and through the decollated apex when the operculum 

 closes the aperture. 



The type, U.S.N.M. No. 535433, has 4.8 whorls remaining and 

 measures: Length, 10.4 mm.; greater diameter, 5.8 mm.; lesser diam- 

 eter, 4.7 mm, A large series of specimens was collected by Bartsch on 

 the north slope of the Sierra de Meneses, east of Yaguajay, Santa 

 Clara Province. 



Bartsch collected specimens also opposite Jungalito, on the north 

 slope of the Sierra de Meneses, and Bermudez found it at Urbaza and 

 El Yigre, Yaguajay, 



