CUBAN ANNULARIIDAE TORRE AND BARTSCH 173 



OPISTHOSIPHON (BERMUDEZSIPHONA) LAMELLOSUM LAMELLOSUM, new subspecies 



Plate 12, Figure 4 



This race comes from Espinosa, Chambas, Camagiiey Province. It 

 differs from 0. (B.) lamellosum lowei in being conspicuously banded 

 with interrupted zones of brown. These markings extend to the 

 outer peristome where the ribs are also much more distantly spaced 

 and a little more strongly sublamellose than in the other subspecies. 

 There is also a tendency toward a line of nodules on the ribs below 

 the cusps at the summit, which gives a false aspect of having a spiral 

 cord. This is not true of the other race. The type has 39 ribs on 

 the last whorl. 



The type, U.S.N. M. No. 535442, has 4.0 whorls remaining and 

 measures: Length, 12.0 mm.; greater diameter, 6.6 mm.; lesser 

 diameter, 5.1 mm. 



OPISTHOSIPHON (BERMUDEZSIPHONA) LAMELLOSUM LOWEI, new subspecies 



Plate 12, Figure 6 



Bartsch collected this subspecies in various places in the Dos 

 Sierras, Santa Clara Province. It differs from typical 0. (B.) lamel- 

 losum lamellosum in being unicolor, therefore lacking the rays on the 

 outer peristome ; in being larger and a little more elongate with more 

 inflated whorls; and in having the axial ribs much more closely spaced 

 and more numerous, "with less conspicuous cusps at the summit; 

 84 axial ribs are present on the last turn in the type. 



The type, U.S.N. M. No. 535444, is a complete specimen having 

 6.4 whorls and measures: Length, 12.0 mm.; greater diameter, 

 6.2 mm.; lesser diameter, 5.2 mm. 



We have seen it also from Loma Esperanza, Zaza del Medio, Santa 

 Clara Province. 



OPISTHOSIPHON (BERMUDEZSIPHONA) PLATEROENSE, new species 



Plate 12, Figure 10 



Shell elongate-ovate, thin, pale browTi, with interrupted spiral 

 bands of darker brown, of which 6 are present on the last turn between 

 summit and suture, and 3 are on the posterior half of the base in the 

 type. Peristome yellow. Nuclear whorls 2, inflated, strongly 

 rounded, microscopically granulose, forming an almost cylindric 

 truncated apex. Postnuclear whorls strongly inflated, rounded, and 

 marked by distantly spaced, sublamellar, slightly retractively slanting 

 axial ribs, which become expanded near the summit into slender 

 cusps, which extend up on the preceding whorl. Not infrequently 

 these cusps are hollow. In addition to this, the axial ribs bear slight 

 scallops; these scallops give the shell a somewhat spirally sculptured 



