EAST AMERICAN SCAPHOPOD MOLLUSKS. 



67 



The type of Dentalium matara, Cat. No. 95363, U.S.N.M., off Cape 

 Lookout, in 31 fathoms, bottom of Wack sand and broken shells, 

 from the U. S. B. F. Station 2611. 



In the National Museum collection are many lots from off Cape 

 Hatteras, Beaufort, Cape Lookout, from the Florida east coast region 

 in shallow water, 6 to 49 fathoms; from the Florida Keys region, 18 

 to 50 fathoms; west coast of Florida shore stations to 111 fathoms; 

 also from San Juan, Porto Rico, and Barbados. 



A lot from Samana Bay, consisting mostly of fragments, are not 

 typical, being more strongly curved. 



Conrad's Dentalium ehoreum seems to have been overlooked until 

 redescribed by Pilsbry and Sharp in 1897. Conrad's specimens 

 showed no notch. We now know the absence of apical characters 

 to be of frequent occurrence in many of the Dentalia. On account 

 of its insufficient description, Miss Bush CT'identty discarded Conrad's 

 species when determining the status of her own D. leptum. 



Practically all large, fuUy aduit or senile specimens lose the entire 

 tip, leaving a perfectly smooth, highly polished sculptureless shell. 

 This is Dall's Dentalium matara. I have only been willing to unite 

 these three species after a most critical examination of many lots, 

 and I do not believe them to be separable even subspecifically. 



The following lots are in the museum collection: 



Locality. 



Remarks. 



Oflf Cape Hatteras, U. S. B. F. Station 2112. 



Off Cape Hatteras, U. S. B. F. Station 2276. 



Off Cape Hatteras, U. S. B. F. Station 2112. 

 Off Cape Hatteras, U. S. B. F. Station 2292. 



Off Cape Hatteras, XJ. S. B. F. Station 2278. 



Off Cape Hatteras, U. S. B. F. Station 2275. 

 Off Cape Hatteras, U. S. B. F. Station 2277. 



Off Cape Hatteras, U. S. B. F. Station 2269. 

 Off Cape Hatteras, U. S. B. F. Station 2295. 

 Off Cape Hatteras, U. S. B. F. Station 2277. 

 Off Cape Hatteras, U. S. B. F. Station 2280. 

 Off Cape Hatteras, U. S. B. F. Station 2273. 



Off Cape Hatteras, U. S. B. F. Station 2276. 



Oflf Cape Hatteras, U 

 20 miles southwest by 

 B. F. station 2597. 

 Off Hatteras, U. S. B 

 Off Hatteras, U. S. B 

 Off Hatteras, U. S. B 

 Off Hatteras, U. S. B 

 Off Hatteras, U. S. B 

 Off Hatteras, U.S. B 

 Off Hatteras, U. S. B 

 Ofl Hatteras, U. S. B 



. S. B. F. Station 2272 



south from Hatteras, U.S. 



. F. Station 2112 



. F. Station 2114 



. F. Station 2289 



F. Station 2269 



F. Station 2276 



F: Station 



F. Station 2601 



. F. Station 2291 



15.5 fms., 73.5° s. blk. sp. (type of 

 leptum). 



16 fms., gy. s. brk. sh. (fig'd. spec. 

 leptum). 



15 fms., 73.5°, s. blk. sp. 



17 fms. (mostly fragments), gy. s. 

 brk. sh. 



16 fms. (tips and fragments), gy. s. 

 brk. sh. 



16 fms. (young), gy. s. brk. sh. 

 16 fms. (mostly young), gy. s. brk. 



sh. 

 49 fms., 77°, crs. bl. gy. s. 

 22 fms., 73.5°, crs. gy. s. 

 16 fms., gr. s. brk. sh. 



16 fms. gv. s. brk. sh. 



17 fms., 72.3° (mostly tips and frag- 

 ments), gy. s. brk. sh. 



16 fms. (mostly young), gy. s. brk. 



sh. 

 15 fms. (young), gys. s. blk. sp. 

 15 fms., sand (young). 



15 fms. crs. gy. s. 



15.5 fms., 73.5°, s. blk. sp. 



14 fms., 72° (fragments), m. blk. s. 



7 fms., crs. s. blk. sp. 



48 fms., 77°, crs. gy. blk. s. 



16 fms., (?) gy. s. brk. sh. 

 16 fms., (?) gy. s. brk. sh. 

 87 fms., 71.5°, fine gy. s. 



^Off Hatteras, U. S. B. F. Station 2113 \ 15 fms., gy. s. blk. sp. 



Off Cape Lookout, U. 

 Off Cape Lookout, U. 



S. B. F. Station 2611 . 

 S. B. F. Station 2608. 



.do 



Ofl Cape Lookout, U. S. B. F. Station 2611. 

 Off Cape Lookout, U. S. B. F. Station 2607. 



15 fms., 72.5°, m. blk. s. 



31 fms., 74° (type of vmtara), blk. 



s. brk. sh. 

 22 fms., 78.2°, crs. gy. s. 

 22 fms., crs. gy. s. sh., 78.2°. 

 31 fms., brk. sh. blk. s., 74°. 



