106 



BULLETIN 111, UNITED STATES NATIONAL MUSEUM. 



Num- 

 ber of 

 spec 

 mens 



Cat. No. 

 U.S.N.M 



38669 

 153667 

 38673 

 38672 

 40258 

 38668 

 38671 

 76836 



38670 

 35417 

 76835 



38674 

 78232 

 78945 



35622 



Locality. 



Off Nantucket Shoals, U. S. B. F. Station 2217. . 

 Off Nantucket Shoals, U. S. B. F. Station 2682. . 

 Off Martha's Vineyard, U. S. B. F. Station 2222 

 South of Block Island, U. S. B. F. Station 2210. 

 South of Long Island U. S. B. F. Station 2234.. 

 South of Block Island, U. S. B. F. Station 2203. 

 South of Block Island, U. S. B. F. Station 2203. 

 100 miles southeast of Block Island, U. S. B. F. 



Station 2748 



South of Blo-k Island, U. S. B. F. Station 2207. 



Off Delaware Bay, U. S. B. F. Station 2103 



100 miles southeast Delaware Bay, U. S. B. F. 



Station 2739 '. 



Off Delaware Bay, U. S. B. F. Station 2231 



Off Georges Bank, U. S. B. F. Station 2706 



80 miles east of Chesapeake, U. S. B. F. Station 



2729 



Off Hatteras, North Carolina," U. s'.B.F. Station 



2111 



Off Hatteras, North Carolina, U. S. B. F. Station 



2115 



Remarks. 



924 fms., 38.1° gy. m. (figd.) 

 1,004 fms., gn. m. s. 

 1,537 fms., 36° gy. oz. 

 991 fms., 38° glob. oz. 

 816 fms., 39° gn. m. 

 705 fms., 38° gn. m. s. 

 Do. 



1, 163 fms., 37° gn. m. form. 

 1,061 fms., 38° gn. m. 

 1,091 fms., 39° glob. oz. 



811 fms., 38° gn. m. 

 965 fms., 38° gy. oz. 

 1, 188 fms., gy. oz. form. 



679 fms., 38° drk. gn. m. 



938 fms., bu. m. 



843 fms., 39° m. fne. s. 



CADULUS (PLATYSCHIDES) SPECTABILIS Verrill. 



Plate 17, fig. 9. 



1885. Cadulus spectahilis Verrill, Trans. Conn. Acad. Arts and Sci., vol. 6, pt. 2, 



p. 432, pi. 44, fig. 19. 

 1889. Cadulus spectabilis, Dall, Bull. Mus. Comp. Zool., vol. 18, p. 429, in part 



and excluding St. Vincent record. 

 1889. Cadulus spectabilis, Dall, Bull. 37, U. S. Nat. Mus., p. 76, in part, pi. 46, 



fig. 19. 

 1898. Cadulus (Polyschides) spectabilis, Pilsbry and Sharp, Tryon's Man. Conch., 



vol. 17, p. 153, pi. 25, fig. 64, in part, and omitting St. Vincent reference. 

 1903. Cadulus spectabilis Dall, Bull. 37, U. S. Nat. Mus., p. 76, pi. 46, fig. 19, in 



part. 



The shell is very large, solid, evenly and moderately curved, with a 

 gibbous swelling just back of a conspicuously constricted very oblique 

 anterior aperture. The convex arc is slightly bulged out at the point 

 of maximum caliber, and thence dips quickly in a flattened curve to 

 the anterior aperture. The concave arc is more strongly curved 

 posteriorly; the second half of it is rather straight and conspicuously 

 convex at the equator, from which point it slopes suddenly to the 

 anterior aperture. The swelling is marked at its section of maximum 

 diameter by an obtuse angle. The anterior aperture is flattened, 

 especially on the dorsal margin. The apical aperture is relatively 

 small, slightly flattened, and cut by four slits, of which the two 

 laterals are deeper and the dorsal and ventral ones are shallow and 

 inconspicuous. This character, as in other species of this group, is 

 frequently confused by injury. Measurements are: 



Length, 22 mm.; maximum diameter, 4 mm.; anterior aperture, 

 2 mm.; apical aperture, 1 mm. (type). 



• Length, 21.5 mm.; maximum diameter, 3.4 mm.; anterior aperture, 

 2 mm.; apical aperture, 1 mm. (U. S. B. F. Station 2570). 



