CUBAN ANNUDARIIDAE TORRE AND BARTSCH 339 



ANNULARIA (BLAESOSPIRA) ECHINUS ([Wright] Pfeiffer) 



Shell decidedly solute in all the postnuclear whorls, ranging in 

 color from yellowish white to pale buff, with the hollow spines and 

 the peristome a little paler. Nuclear whorls 2, well rounded, smooth, 

 not solute, forming a pupoid apex. Postnuclear whorls forming an 

 openly coiled tube with 4 rows of strongly elevated, thin, hollow 

 spines between the summit and the umbilicus; these spines are ar- 

 ranged in axial as well as in spiral series, and they are connected 

 axially by slender threads, which pass up on the sides of the spines. 

 The spines are very thin and oval in cross-section. There are also 

 feeble threads on the lateral sides of the spines. Between the spines, 

 4 to 7 slender axial threads are present, which are of about the same 

 strength and spacing. The stronger axial threads upon which the 

 spines are placed are also well developed on the parietal wall, and the 

 finer threads between them are of the same strength here as on the 

 rest of the whorls. Aperture circular; peristome double, the inner 

 slightly exserted, scarcely reflected; the outer expanded into fimbria- 

 tions, which are strongest on the outer wall corresponding with the 

 stronger spines; on the parietal wall they are more feeble and the 

 spaces between them are less broadly expanded. Operculum with 

 subcentral nucleus and a strong lamella rising almost vertically from 

 the outer edge of the turns to considerable height, slightly reflected 

 at the free margin and marked by obliquely slanting threads. 



We are recognizing three subspecies, which the following key and 

 descriptions will help to differentiate: 



KEY TO THE SUBSPECIES OF ANNULARIA (BLAESOSPIRA) ECHINUS 



Digitations of the outer )ip very strongly developed. 



Digitations on the parietal lip well developed echinus 



Digitations on the parietal lip feeble lucifer 



Digitations of the outer lip not very strongly developed infiernalis 



ANNULARIA (BLAESOSPIRA) ECHINUS ECHINUS ([Wright] Pfeiffer) 



Plate 39, Figures 1, 2 



186-1. Cyclostoma (Choanopoma) echinus [Wright] Pfeiffer, IMalakozool. Blatter, 



vol. 11, p. 102. 

 1865. Choanopoma echinus (Wright) Pfeiffer, Monographia pneumonopomorum 



viventium, suppl. 2, p. 106. 

 1890. Blaesospira echinus Crosse, Journ. ConchyL, vol. 38, p. 282, pi. 5, fig. 3. 



This subspecies comes from the north side of El Queque, sometimes 

 spoken of as Ensenada del Grillo, Palmarito. It has the digitations of 

 the outer lip very strongly developed. Those on the mner and parietal 

 lip are also well developed and in this respect this subspecies differs 

 from A. (B.) echinus lucifer, where the converse is true. 



Wright's specimen, U.S.N.M. No. 11022, has 2.3 whorls remaining 

 and measures: Length, 6.9 mm.; greater diameter, 5.8 mm.; lesser 



223580—40 14 



