CUBAN ANNULARiroAE TORRE AND BARTSCH 179 



The type, U.S.N.M. No. 535452, has 3.2 whorls remaining and 

 measures: Length, 12.0 mm.; greater diameter, 7.3 mm.; lesser 

 diameter, 6.0 mm. 



OPISTHOSIPHON (BERMUDEZSIPHONA) OBTECTUM OBTECTUM Torre and Henderson 



Plate 13, Figure 1 



1920. Opisthosiphon (Opislhosipliona) obtedus (Torre and Henderson MS.) Hen- 



derson and Bartsch, Proc. U. S. Nat. Mus., vol. 58, p. 68, nomen nudum. 



1921. Opisthosiphon (Opisthosiphon) obtedum obtedum Torre and Henderson, 



Proc. U. S. Nat. Mus., vol. 59, pp. 262-263, pi. 42, figs. 2, 3. 



This subspecies, which was described from El Palenque de Taguaya- 

 bon, near Remedios, Santa Clara Province, and which we have also 

 found at Rojas, Remedios, differs from 0. (B.) obtedum seibahoense 

 in being slenderer, in having the whorls a little more inflated, and in 

 having the axial ribs more pronounced, more closely spaced, and much 

 more numerous. The ribs also have faint indications of obsolete 

 nodules. In the type the first of the remaining whorls has 26 axial 

 ribs, while on the last there are 68, 



The type, U.S.N.M. No. 314961, has a little more than 3 whorls 

 remaining and measures: Length, 12.3 mm.; greater diameter, 7.9 

 mm.; lesser diameter, 5.8 mm. 



OPISTHOSIPHON (BERMUDEZSIPHONA) OBTECTUM TENUICOSTUM Torre and 



Henderson 



Plate 13, Figure 6 



1921. Opisthosiphon (Opisthosiphon) obtedum tenuicostum Torre and Hen- 

 derson, Proc. U. S. Nat. Mus., vol. 59, p. 263, pi. 42, figs. 4, 5. 



This race comes from Cerro de la PuntUla near Remedios, Santa 

 Clara Province. It differs from 0. (B.) obtedum obtedum in being more 

 chubby, with the whorls more inflated, the ribs much less strongly 

 developed, and the denticles even more numerous. The outer peri- 

 stome is also less expanded. In the weakness of the axial ribs it 

 resembles 0. (B.) obtectum seibaboense. In the type there are 32 axial 

 ribs on the first of the remaining whorls and 80 on the last whorl. 



The type, U.S,N,M. No. 314962, has a little more than 3 whorls 

 remaining and measures: Length, 10.2 mm.; greater diameter, 6.7 

 mm.; lesser diameter, 5.5 mm. 



Animals of this subspecies collected by Bartsch on La Puntilla 

 August 5, 1928, were described by him as being dark olivaceous with 

 numerous lighter dots on the papillae. Tentacles pale orange tipped 

 at the slightly expanded end with black, which coloring produces a 

 very strikmg eft'ect. The animal suspends with a mucous thread 

 when at rest, 



223580—40 4 



