256 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [46] 



The three largest suckers (Plate IX, fig. 9), supposed to be from near 

 the base of the lateral arms, have about 45 marginal denticles, of nearly 

 uniform size, and less incurved than in those above described. In these 

 the back side of the horny ring is less expanded, and therefore the 

 suckers were less oblique than in the smaller ones. The largest of these 

 [a) had the aperture 20 mm in diameter. 



Measurements of suckers of short arms (in millimeters). 



Transverse diameter, outside . 

 Diameter of aperture, inside . . 

 Hight of horny ring, back side 

 Hight of horny ring, front side 



Number of large denticles 



Number of small denticles 



21 

 10.5 



17 



8.5 

 11 



3 



9 

 12 



9.5 

 4.5 



7 



3.5 

 5 



1.5 

 4 



The long tentacular aims agree very closely with those of J.. Harvey i 

 (No. 5) in form and in the arrangement of the suckers on the ' club.' 

 When fresh they measured 914.4' m (30 feet) in length, with a circumference 

 of about 12.7 cm (5 inches), except at the enlarged club, which was 

 20.32 cm (8 inches) in the middle. But when first examined by me they 

 had shrunk to 731.5 cm (24 feet) in length, and the circumference of the 

 slender portion was 9 cm to 10 m ; that of the club was 15.24 cm (6 inches). 

 At that time the club was 77.47°™ (30.5 inches) long; that portion bear- 

 ing the larger suckers was 48.26 cm (19 inches) ; the wrist or portion bear- 

 ing the smaller and partly smooth-rimmed suckers and tubercles was 

 15.24 cm (G inches) long; the terminal portion, bearing small denticulated 

 suckers, was 22.8G rra (9 inches) ; the breadth of the front of the club was 

 7.02 cm (3 inches). The terminal portion had a strong carina-like mem- 

 brane or crest along the back, and was here 5 cm (2 inches) wide from 

 front to back. 



The large suckers (Plate IX, figs. 1, 1 a) of the tentacular arms are 

 nearly circular in outline, and are broad, depressed, little oblique, con- 

 stricted just below the upper margin, and then swelled out below the 

 constriction to the base. The calcareous ring is strong, white, and so 

 ossified as to be somewhat rigid and bone-like. The margin is sur- 

 rounded by numerous (about 45 to 50) nearly equal, acute-triangular 

 teeth, sometimes separated by spaces equal to their breadth, at other 

 times nearly in contact at their bases ; their edges are so beveled as to 

 be sharp, Avhile there is a triangular thickening in the middle of each 

 at base. A wide, deep, and concave groove extends entirely around the 

 rim a short distance below the margin ; below this the lower part of the 

 rim is somewhat expanded and irregularly plicated, varying in width. 

 The largest ring examined by me measures 31 mm in its greatest diameter 

 externally ; the aperture is 2G mm and 23 mm across its longer and shorter 

 diameters ;* greatest hight or breadth of rim, ll mm ; least hight, 8 mm ; 

 breadth of groove, 1.5 mm to 2 m,n . 



* This specimen is somewhat warped by drying, so that the aperture is not so cir- 

 cular as when fresh. 



