Measurements of Sthenotenthis megaptera and S. pteropus (in inches). 



Length, tip of tail to end of dorsal arms, 



'• tip of tail to end of 3d pair 



" to end of tentacular-arms, 



" to base of arms, -- 



From base of arms to mantle, — 



Tip of tail to edge of mantle (above), 



" " (below), 



Tip of tail to center of eye, 



Length of caudal fin (tip to insertion), — 



Breadth of caudal fin, 



Breadth between lateral insertions, 



End of body to outer angle of tin, . 



Front edge of fin, from outer angle to insertion, 



Circumference of body, - -. 



Breadth of body, - -. 



Breadth of head, ... 



Diameter of eye-opening (longitudinal), 



■' " (transverse), 



Length of tentacular-arms, 



Length of dorsal arras, (1st pair, ) 



" subdorsal " (2d pair,) 



" subveutral " (3d pair), .-. 



" ventral " (4th pair. ) . . 



Breadth of 1 st pair of arms, at base, ..- -. 



2d " 



" 3d " - 



4th " -- 



" tentacular-arms, 



" terminal club of same, . 



Length of siphon, iu middle, — - 



Breadth of siphon, at base, 



Breadth of aperture of siphon, 



Details of tentacular -arms : 



Length of ' club, ' or expanded part, 



" part bearing large suckers, . 



'• ' wrist.' bearing smaller suckers, 



' ' tip, with small suckcs, 



Breadth of ' club, ' in middle, 



" middle of arm, 



Details of suckers : 



Diameter of largest suckers of tentacular-arms, 



•' rims of same, .. 



" largest suckers of dorsal arms, 



" rims of same, 



" largest suckers of 2d pair 



" rims of same, 



" largest suckers of 3d pair, . .. . 



" rims of same, — 



" largest suckers on ventral arms, 



" rirasofsame, 



Jaws : 



Upper mandible — total length, 



" " tip of beak to bottom of notch, .. 



" " tip to dorsal edge of frontal lamina 



" " breadth between anterior lobes of ala3, 



" '• breadth of palatine, 



Lower mandible — total length, 



" " depth, end of alas to mentum, .. 

 " " beak to notch, 



