8 



BULLETIN 192, UMTED STATES NATIONAL MUSEUM 



The base is moderately long, somewhat inflated, well rounded, and 

 marked hke the spire. The umbiUcal wall is marked by a series of 

 spiral cords that grow consecutively weaker from the outer inward. The 

 last whorl is solute for about one-twentieth of a turn. Aperture auricular 

 or pear-shaped. The peristome is simple. Operculum paucispiral with 

 the nucleus halfway between subcentral and marginal; the outside is 

 usually covered with a thin deposit of fine calcareous granules. 



The species is known only from the Dominican Republic. The fol- 

 lowing key will help to recognize the known subspecies : 



KEY TO TELE SUBSPECIES OF CHONDROPOMA (CHONDROPOMORUS) 



SALLEANUM 



Length more than 17 mm salleanum 



Length less than 16 mm cookei 



CHONDBOPOaiA (CHONDROPOMORUS) SAU^EANTJlVt SAI^LEANUM (Pfeiffer) 



Plate 1, Figure 9 



1850. Cyclostoma salleanum Pfeiffer, Zeitschr. Malak., vol. 7, p. 78. 



1852. Chondropoma salleanum Pfeiffer, Conspectus cyclostomaceorum . . ., p. 44. 



1854. Cyclostoma salleanum Pfeiffer, Martini-Chemnitz Conchylien Cabinet, ed. 



2, vol. 1, sect. 19, pp. 274-275, pi. 37, figs. 13, 14 

 1920. Chondropoma (Chondropomorns) salleanum Henderson and Bartsch, Proc. 



U. S. Nat. Mus., vol. 58, p. 61. 



PfeifTer's specimens were collected at Tablaso near Santo Domingo 

 City. All our specimens are from this immediate region. 



This subspecies is in every way much larger than Chondropoma 

 (Chondropomorns) salleanum cookei, which it otherwise resembles. 



The specimen figured is one of two entered as U.S.N.M. No. 493313. 

 It has a little more than 7 whorls and measures: Length, 18 mm.; 

 greater diameter, 10.7 mm.; lesser diameter, 8.1 mm. A summary of 

 the measurements of the remaining specimens yields the following data: 



Greatest 

 Least . . 

 Average 



Number 

 of whorls 



7.6 



4.-f 



6.2 



Length 



Mm. 



22.7 

 15.5 

 18.4 



Greater 

 diameter 



Mm. 



11.9 



9.0 



10.5 



Lesser 

 diameter 



Mm. 



9.2 



7.4 

 8.2 



U.S.N.M. No. 151330 contains i specimen from the Salle Collection 

 labeled "Santo Domingo." 



U.S.N.M. No. 493314 contains i specimen received from Fulton 

 labeled "Haiti." 



U.S.N.M. No. 493315 contains 3 specimens from the Ford Collection 

 labeled "Santo Domingo." 



U.S.N.M. No. 99634 contains 4 specimens from a bat cave at Santo 

 Domingo collected by Dr. W. Newcomb, 



