96 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



PARACHONDROPS (CLENCHIPOMA) CLENCHI, new species 



Plate 14, Figure 11 



Shell elongate-conic, flesh-colored, with narrow spiral interrupted bands 

 of brown, of which four occur between the summit and the periphery 

 and three on the base. These bands are apparent also in the aperture 

 and extend over the peristome. Nuclear whorls almost 2, inflated, 

 strongly rounded, forming a flattened mammillated apex. Postnuclear 

 whorls rather high between sutures, moderately rounded, and marked 

 by retractively curved, sublamellar axial ribs, which expand at the sum- 

 mit into hollow cusps. Of these axial ribs, yy are present on the last 

 turn. The spiral sculpture consists of obsolete threads, which feebly 

 nodulate the axial ribs or, at all events, render them wavy. Of these, 

 seven are present between the summit and the suture. Suture moderately 

 constricted. Periphery well rounded. Base rather long, well rounded and 

 narrowly openly umbilicated, and marked by the continuation of the 

 axial ribs and two strong spiral cords, which render the ribs nodulose. 

 An additional spiral cords is apparent near the outer edge of the um- 

 bilicus. The last whorl is solute for about one-tenth of a turn. Aper- 

 ture subcircular ; peristome double, the outer slightly expanded, forming 

 an auricle at the posterior angle, of about the same width all around; 

 the inner slightly exserted and appressed to the outer. Operculum with 

 strong, retractively curved ribs, which fuse at their inner edge into a 

 slight lamella and which evanesce at about the middle of the whorls of 

 the basal chondroid plate. 



The type (Mus. Comp. Zool. No. 119517a) has 5 whorls remaining 

 and measures : Height, 9.0 mm. ; greater diameter, 3.6 mm. ; lesser di- 

 ameter, 3.2 mm. This was collected by the Museum of Comparative Zo- 

 ology's expedition to Santo Domingo at Cayo Carbon (Carenara), Santa 

 Barbara, Samana Bay. 



This expedition also collected it at the following localities: Los 

 Farallones, 8 miles east-northeast of Santa Barbara; Cayo Chico, 2^ 

 miles east of Santa Barbara; Punta Lirio, 2 miles east of Santa Barbara, 

 Punta Siballo, Cayo de Tamaso, and Cayo Paloma, all in Samana Bay. 



Most of this material is in the collection of the Museum of Compara- 

 tive Zoology. A small series in the National Museum, as follows: 



U.S.N.M. No. 504029 contains 9 topotypes from the same source. 



U.S.N.M. No. 536864 contains 11 specimens from Los Farallones, 8 

 miles east-northeast of Santa Barbara. 



U.S.N.M. No. 536865 contains i specimen from Cayo Chico, 2>^ 

 miles east of Santa Barbara. 



U.S.N.M. No. 536866 contains 5 specimens from Punta Lirio, 2 

 miles east of Santa Barbara. 



U.S.N.M. No. 536867 contains i specimen from Punta Siballo. 



