214 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



This species is easily distinguished from all the other Bahaman Chon- 

 dropomas by its lack of channeling of the suture, even immediately be- 

 hind the aperture. The absence of granular sculpture combined with this 

 is of assistance in its determination. 



CHONDBOFOMA (CHONDBOPOMA) INAGC£MS£ (Weinland) 



Plate 35, Figure 4 



1880. Cyclostoma (Chondropoma?) inaguense Weinland, Jahrb. deutschen malak. 

 Ges., vol. 7, pp. 345-346, pi. 12, fig. 6. 



Shell scarcely perforated, ovate, pupiform, entire, solid, rendered 

 conspicuously and elegantly reticulate by strong spiral lines and longi- 

 tudinal striations. Suture scarcely impressed. Whorls 5.5, slightly con- 

 vex, almost flattened, the last solute, carinated at the posterior angle. 

 Aperture vertical, angulately oval. Peristome simple with the margin 

 expanded. Operculum? Length, 13.0 mm.; diameter, 6.0 mm.; aperture, 

 4.0 mm. long and 3.5 mm. wide. Collected by Sargent on Little Inagua. 



The above is a free translation of Weinland's description. I have seen 

 no specimens of this species and continue to quote from Weinland, who 

 says: "Related to Chondropoma semilabre Lamarck (glabratum 'Wein- 

 land' Reeve), which was lost and which we again discovered in 1857 

 on Crooked Island of the Bahamas. It differs from this by its solute 

 last whorl, deeper suture and relatively smaller, particularly shorter, 

 aperture. It is an interesting species whose habitus reminds one of 

 Megalomastoma, particularly of the Tertiary Megalomastoma pupa from 

 Hochheim, near Frankfurt am Main, but differs from this by the sculp- 

 ture of the shell and the aperture. It undoubtedly belongs closely to its 

 related Chondropoma semilabre. 



"From Chondropoma hjalmarsoni Pfeiffer it differs by its solute last 

 whorl and the relatively much smaller aperture and by the fact that the 

 shell remains entire, that is, does not become decollated. It seems likely 

 to us that the three species, Chondropoma semilabre, C. hjalmarsoni and 

 C. inaguense, once upon a time when the islands were still united, be- 

 longed to one and the same species." 



In the light of our modern oceanographic and geologic data, the last 

 statement is hardly supported. 



THE STATUS OF CHONDBOPOMA (CHONDBOFOaiA) SOBOB PILSBBY 



1930. Chondropoma soror Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, vol. 82, 



p. 299, pi. 30, fig. 6. 

 1930. Chondropoma parvicaymanense Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, 



vol. 82, pp. 352-353, pi. 30, fig. 5. 



Following a detailed description of this species Pilsbry states: 

 "While it seems unlikely that a shell of this size would remain undis- 

 covered in the neighborhood of Nassau, I am unable to find an Antillean 

 species with which it agrees, but it is so similar to C. parvicaymanense 



