314 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



ANNULARIA (EUTUDORISCA) CATENATA CATENATA (Gould) 



Plate 34, Figure 7 



1843. Cyclostoma catenatum Gould, Proc. Boston Soc. Nat. Hist., vol. 1, p. 138. 



1847. Chondrojpoma catenatum Pfeiffer, Zeitschr. Malak., vol. 4, p. 109. 



1852. Cislula catenatum Pfeiffer, Catalogue of Phaneropneumona ... in the 



British Museum, pp. 182-183. 

 1920. Tudora (Eutudorisca) catenata Henderson and Bartsch, Proc. U. S. Nat. 



Mus., vol. 58, p. 78. 



This race extends from Limonar through Coliseo. It is larger than 

 A. (E.) catenata blanesi, and it has many more spiral threads on the 

 umbilical wall, 19 being present in the specimen figured, while A. (E.) 

 catenata blanesi shows only 11. 



The specimen figured, U.S.N.M. No. 493490, was collected by 

 Bartsch on a limestone bluff near the rifle range at Limonar. It has 

 5.5 whorls and measures: Length, 12.5 mm.; greater diameter, 8.7 

 mm.; lesser diameter, 7.0 mm. 



The animal of this species, collected at the rifle range 2 miles south 

 of Limonar July 23, 1928, is described by Bartsch as having a short 

 body, the entire animal being buff except for a dark band across the 

 head immediately in front of the tentacles, behind which there is a 

 pinkish flush. Tentacles orange, except for a dark short streak on 

 the dorsal side near the base; the extreme tip, which is slightly stouter 

 than the part preceding, is brownish. Sole of the foot deeply medially 

 cleft, of the same color as the body. The motion of the foot is alternate 

 on the two sides. The animal when at rest suspends itself by a 

 mucous thread. 



ANNULARIA (EUTUDORISCA) CATENATA BLANESI, new subspecies 



Plate 34, Figure 3 



This is a small race from Cardenas. It also has much fewer spiral 

 threads on the umbilical wall. 



The type, U.S.N.M. No. 493491, has 5.1 whorls and measures: 

 Length, 10.4 mm. ; greater diameter, 7.8 mm. ; lesser diameter, 6.8 mm. 



Subgenus Diplopoma Pfeiffer 

 1859. Diplopoma Pfeiffer, Malakozool. Blatter, vol. 6, p. 73. 



Shell varying from elongate-ovate to elongate-conic. Postnuclear 

 whorls marked by sublameUar axial riblets and spiral threads. Oper- 

 culum with a broad calcified lamella, which bends obliquely outward 

 to almost parallel the basal plate on its outer half. This lamella is 

 reenforced by numerous strong, obliquely retractively curved, slender 

 lamellae. 



Type: Annularia (Diplopoma) architectonica ([Gundlachl Pfeiffer). 



