376 BULLETIN OF THE 



Subgenus TURCICULA Dall. 

 Turcicula imperialis Dall. 



Plate XXII. Figrs. 1,1a. 

 Margarita (Turcicula) imperialis Dall, Bull. M. C. Z., IX. p. 42, 1881. 



Habitat. Off Cuba, in 200 fms. 



Only the original specimen has been found so far in the Blake collection, 

 but another has been added by the dredgings of the Albatross, from 182 fms., 

 coral bottom, off Havana. It is also dead and wants the tip, but it shows from 

 its proportions (base 12.0, and alt. of three whorls counting back from aperture 

 15.0 nun.) that the shell is more highly elevated and conical than would be 

 anticipated from the specimen figured. 



A fine species of what seems to be this subgenus of the group w^as obtained 

 in the Pacific by the Albatross Expedition, and affords the following notes on 

 the soft parts of Turcicula. 



The sides of the foot below the epipodial line are granulous, above the line 

 the surface is rather smooth. Much of the surface is apt to be covered with 

 a layer of blackish or olivaceous substance like solidified mucus or paint, which 

 seems to belong to the animal, yet is wholly external to the cuticle. The foot 

 is broad, not very long, bluntly pointed behind; the front edge straight, 

 double, the lateral angles pointed. The upper layer of the edge is smooth and 

 turgid in most of the specimens. It is not indented in the median line. 



The muzzle is stout, circularly wrinkled, a little expanded at the disk. The 

 oral disk is not marginated; its surface is finely granulose; it is angulated at 

 its lower outer corners and medially indented below. There are no oral palps 

 or tactile appendages. 



The cephalic tentacles for the size of the animal are small and short. At 

 their inner bases are small "palmettes," or cephalic epipodial fringes, not quite 

 meeting in the middle line. They are rounded, with papillose edges. At the 

 outer bases of the tentacles are the eyes, large, oliviform, mounted on short 

 pedicels. The pigmented portion itself is ovoid, and not hemispherical. In 

 some specimens the pigment seems to be more extensive on the under side, in 

 others the reverse, and still others have it equally distributed. A lens and 

 aqueous humor are distinctly observable. At the right side, behind and on a 

 level with the eye, is a short tubular verge. The anterior epipodial side-lappet 

 does not appear to be modified into a seminal conduit, as in Margarita infundi- 

 bulum Watson. These lappets are nearly symmetrical. Their bases are turned 

 up a little on each side behind the eyes, and the lappets are rather wide. They 

 extend backward about two thirds of the way to the operculum, with a finely ' 

 papillose edge. Then comes a single tentacular filament, less than half as 

 long as a cephalic tentacle. There is another stretch of edge fringed with only 

 small papillae; under the operculum there are three long filaments, of which 

 the posterior is longest. Behind the operculum the epipodial lines of the two 



