1894. PEOCEEDINCrS OF THE NATIONAL MUSEUM. 681 



lines of growth, faint traces of obscure spiral lines, and a few feeble 

 narrow threads on the base and canal under a pale thin epidermis. The 

 last whorl is compressed at the periphery, as In Glandina paralleJa, 

 giving the body whorl a subcylindric aspect; suture appressed; aper- 

 ture long, rather narrow, internally saiooth, and with very little callus 

 on the pillar or body; outer lip sharp, emarginate before and behind 

 and arched forward in the middle; pillar obscurely thickened behind, 

 attenuated anteriorly, as long as the canal, straight, but slightly 

 twisted; canal and anal emargination wide and shallow; length of an 

 adult, 75 ; of the aperture, 45 ; width of the shell at the posterior angle of 

 the aperture, 20 mm.; length of the tigured specimen, 45 mm. 



Stations 3471, in 337; 3474, in 375; and 3476, 298 fathoms, southeast 

 of Honolulu. Nos. 107013, 107019, and 107160, TJ.S.X.M. 



The animal is of a yellowish color, the columellar muscle attached 

 very deeply within the shell. The foot is strong. In the alcoholic 

 specimen it is transversely wrinkled below, wrinkled and more or less 

 granose at the sides above, the posterior end obtusely pointed; ante- 

 riorly it is wider, with the lateral angles produced and the anterior 

 margin double. The rostrum is quite peculiar, dilate, and squarely cut 

 off at the end, which exhibits a flat, circular face concentrically 

 wrinkled, with a very large rounded mouth, the edge of which is deeply 

 radially wrinkled, giving it a papillose aspect externally. The horizon- 

 tal line Joining the bases of the tentacles will pass below the central axis 

 of the rostrum, which is also distinctly constricted behind the tentacles. 

 The surface of the rostrum is smooth, its dorsal line arched. The tenta- 

 cles are short, stout, transversely wrinkled, and distinctly larger distally. 

 There is a slight enlargement near their bases, where a small, black- 

 pigmented eyespot is clearly visible on both. There is no trace of an 

 opeiculum or opercular lobe, nor anyepipodial processes. Eaising the 

 mantle, which has a slightly thickened, smooth edge, we find, rather 

 far back, the verge, which consists of a rather stout, recurved basal 

 portion, above which it is constricted, the remainder being more slen- 

 der, subcylindrical, slightly enlarged distally, but beyond this tapering 

 to a i)oint. The organ is smaller in proportion to the size of the ani- 

 mal than in most Pleurotomidee. Above, on the dome of the mantle, is 

 attached the rectum, with an evenly tapered adherent termination and 

 a longitudinally wrinkled subcylindrical lumen. To the left of this the 

 muci i)ar(ms gland and kidney cover a broad strip of the mantle. Farther 

 to the left we find a ctenidium composed of a single series of leafl.ets of 

 the ordinary type, succeeded on the left by a well developed Sprengel's 

 organ, as usual, of a dark-olive color. The siphon, which is closely 

 adjacent, is of very substantial tissue, with an external tinge of olive 

 brown. It presents nothing unusual. 



Internally the anatomy offers several points of inierest. Within the 

 oral orifice is an immense " crop " or pharynx (22 mm. long in the speci- 

 men examined), which, from the deep longitudinal wrinkles of its sur- 



