318 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



1920. Diplopoma architectonicum Henderson and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 58, pp. 79, 80. 



This subspecies comes from the region of Yateras, northeast of 

 Guantdnamo. It is larger than A. (D.) architectonica libanoensis and 

 it has the axial ribs coarser and more distantly spaced. Of these 

 ribs, 58 occur on the first of the remaining turns, 96 on the second, 124 

 on the third, 162 on the fourth, and 188 on the last. 



The specimen described and figured, U.S.N.M. No. 356495, is one 

 of five received from Poey collected at Yateras by Gundlach. It 

 has a little over 5 whorls and measures: Length, 18.2 mm.; greater 

 diameter, 8.8 mm.; lesser diameter, 7.0 mm. 



Gundlach states of this subspecies (Malakozool. Blatter, vol. 7, 

 p. 73, 1859): "Found on cliffs at Yateras. Animal white with rosy 

 suffusion on the neck. Feelers rose or almost cinnabar red with 

 grayish apex. Some dark dots are present on the head." 



ANNULARIA (DIPLOPOMA) ARCHITECTONICA TANAMENSIS. new subspecies 



Plate 35, Figure 2 



This is the northern representative of the species. Tliis race is 

 easily distinguished from the other two by its much enfeebled sculp- 

 ture. 



The specimen which we have described and figured, U.S.N.M. No. 

 57324, was collected by Arango at Ingenio el Coco, about 3 miles 

 southeast of Sagua de T^namo. The type has 70 axial riblets on the 

 first of the remaining turns, 98 on the second, 118 on the third, and 

 196 on the last. It has a little over 4 whorls and measures: Length, 

 13.0 mm.; greater diameter, 6.8 mm.; lesser diameter, 5.7 mm. 



ANNULARIA (DIPLOPOMA) PILSBRYI, new species 



Plate 35, Figure 6 



Shell small, thin, elongate-ovate, semitranslucent, straw colored; 

 early whorls decollated, those remaining strongly rounded, marked by 

 strong, rather distantly spaced, lamellar axial ribs, the ribs extending 

 prominently above the suture as conspicuous expanded auricles, but 

 not fusing into tufts. Of these ribs 34 are present on the fhst of the 

 remainmg turns, 95 on the second and third, 139 on the fourth, and 

 88 on the last eight-tenths of a whorl. The spiral sculpture is obsolete 

 on all the turns on the spire. On the base, however, there are 6 cords, 

 which grow consecutively stronger from the anterior backward, the 

 last forming decided scallops. The umbihcal wall is marked by 14 

 spiral threads, wliich render the axial riblets elongatedly nodulose. 

 Suture strongly constricted, bridged over by the riblets at the summit. 

 Periphery strongly rounded. Base moderately long, strongly rounded. 



