336 PROCEEDINGS OF THE NATIONAL :MUSEUM vol. 85 



expanded as in C. (6'.) p'lctum arangoi and decidedly thickened all 

 around. 



The type, U.S.N.M. no. 493090, has a little more than 3 whorls 

 remaining; and measures : Length, 16.9 mm ; greater diameter, 10.5 

 linn; lesser diameter, 8.6 mm. 



CHONDROPOMA (CHONDROPOMA) PICTUM PICTUM (Pfeiffer) 



Pl.\te 29, Figure 2 



1839. Cijclostoma pictuni Pfeiffek, Wiog. Archiv. Natiirg., vol. 1, p. 356. 

 1846. Cyclostonia pictum PFEnrER. Martini-Cheinnitz Conchylien Cabinet, vol. 1, 

 sect. 19, p. 12.5, pi. 15, figs. 1-11 ; pi. A, figs. 4-5. 



This, tlie typical race, was described by Pfeiffer from Fundador, 

 He, like ourselves, found it quite abundant on the limestone bluffs 

 of the Canimar Kiver nearby. 



It is a small race, rather strong!}^ sculptured, of flesh-color ground 

 color with the merest tinge of yellow, resembling C. (C.) picfum 

 yutneriense but having a much more thickened peristome, in which 

 it resembles the much larger C. (C.) picfum mahogani. 



The specimen figured, U.S.N.M, no. 384845, has 4.5 whorls remain- 

 ing and measures: Length, 19.2 m; greater diameter, 11.0 m; lesser 

 diameter, 9.2 mm. 



CHONDROPOMA (CHONDROPOMA) PICTUM MAHOGANI (Gould) 



Plate 29, Figure 1 



1842. Cyclosfoiiia niuhogani Gould, Jonrn. Boston Soc. Nat. Hist, vol. 4, cover 



of part 1. 

 1844. Cyclostonia mahogani Gould, Jonrn. Boston Soc. Nat. Hist., vol. 4, p. 495. 



This name subsequent to its introduction has met with unfortunate 

 vicissitudes. It was based upon specimens collected by Bartlett, an 

 engineer, at a sugar central near Limonar. Bartlett probably 

 marked them Caoba, the name of a place very close to Limonar. 

 Caoba is the Spanish name for mahogany, hence Gould's name ma- 

 hogarii^ which has nothing to do with the coloration of the shell. A 

 misinterpretation of this fact has caused confusion of this race with 

 C. {C.) pict/umgouldianum and C. (C.) p. yuiyieriense. 



In this race the shell is rather large, ground color pale buff, which 

 is also the color of the peristome. Interrupted spiral bands of brown 

 mark the spire and, to a slightl}' lesser degree, the base. It resem- 

 bles most near C. (C.) pictum mochen^e^ but that subspecies is 

 thinner and has flesh-colored ground color and peristome. The 

 differences in the color of the animal are shown under the specific 

 description. 



The specimen figured, U.S.N.ISI. no. 493092, has 4.5 whorls re- 

 maining and measures: Length, 24.1 mm; greater diameter, 14.0 mm; 

 lesser diameter, 11.8 mm. 



