A. E. Verrlll — North American Cephalopods. 217 



height or breadth of rim, i]'""' ; least height, 8""" ; breadth of groove, 

 1-5 to 2""". 



The marginal suckers (Plate XVII, fig. 10), alternating with the 

 large ones on the ' club,' are very oblique, with the rings strong 

 and very one-sided, the height of the back being more than twice 

 that of the front margin. The aperture is not circular, the outer 

 portion of the margin being incurved or straight. The groove 

 below the margin is narrow and deep, especially on the sides, but 

 only extends around the front and sides, being entirely absent on 

 the outer third of the circumference. The denticles are about 22 to 

 24, slender, acute, not crowded, the most of them being separated 

 by spaces greater than their breadth at base. The outer ones are 

 strongly incurved ; those along the sides are curved forward ob- 

 liquely toward the front margin, while those on the front margin 

 point upward and sometimes rather outward. The denticles are of 

 neai'ly equal length, but those of the front margin are both more 

 slender and more acute; they all have sharp bevelled edges and a 

 thickened median ridge or tubercle. The largest ring examined was 

 14°"" in diameter, height or breadth of back side of rim, 8""" ; of front 

 side, 3-5™"\ 



The small suckers, covering the last division of the club, are very 

 similar to the marginal ones last described, except that they are much 

 smaller and more delicate, wnth a narrower and less oblique rim. 

 The denticles of the inner margin are very acute and point obliquely 

 outward and upward. Greatest diameter of the one described, 6""" ; 

 height of back side of rim, 4'"'" ; of front side, 1 -5'""'. 



The small terminal group of smooth-rimmed suckers, seen in Xo. 5, 

 weie not noticed, but they were not looked for specially. 



To this species I have also referred the specimen (No. 13) from 

 Grand Bank, Fortune Bay, (see page 188, w^here the general meas- 

 urements are given). Fortunately, Mr. Simms was able to obtain the 

 jaws in pretty good condition, and also one of the largest suckers of 

 the tentacular-arms. These specimens were forwarded to me by the 

 Rev. M. Harvey. They had been dried, and the jaws, which were 

 still attached together by the ligaments, had cracked somewhat, but 

 all parts were present, except the posterior end of the palatine lamina, 

 which had been cut or broken off. Although these jaws had undoubt- 

 edly shrunken considerably, even when first received, they were 

 afterwards put into alcohol and have since continued to shrink, far 

 more than would have been anticipated, so that, at present, the de- 

 crease in some of the dimensions amounts to 20 per cent., while even 



Trans. Conn. Acad., Vol. Y. 28 February, 1880. 



