406 
A. E. Tern'll — North American Cephalopods. 
Brachioteuthis Beanii, sp. nov. 
Plate LY, figures 3-36; Plate LYI, figures 2-2 a . 
Male : Body rather small, tapering backward to an acute posterior 
end; dorsal mantle-edge with a broad obtuse angle; caudal fin large 
in proportion to the body, broad rhomboidal ; outer angles prominent, 
anterior to the middle ; the anterior lobes project forward considera- 
bly beyond the insertions, and are rounded. The form of the fin is 
much like that of Ommastrephes. Head thickened at the bases of the 
arms, not so large in proportion to the body as in C. lacertosa. Eyes 
large, eye-lids thin. Siphon large, with two strong dorsal bridles; 
internal valve broad, rounded, somewhat back from the orifice; 
connective cartilages long ovate, broadest behind (fig. 2 a) ; dorsal 
cartilage of neck oblong, with a strong median ridge and two deep 
parallel grooves. Lateral cartilages of mantle (fig. 2) are simple linear 
ridges, extending to the edge of the mantle. Arms not very large, 
somewhat rounded, long and slender; the dorsal ones are much 
smaller and shorter than the others; two lateral pairs nearly equal 
in size and length, more than two-thirds the length of the mantle. 
Ventral arms shorter and much more slender than the lateral, more 
than half the length of the mantle; the ventral arms show but little 
of the compressed, oblique form, so conspicuous in the preceding 
species, and the crest or fold of skin along the outer-ventral angle is 
narrow, thin, and not very conspicuous ; the suckers ou the ventral 
arms are in two alternating, not distant, rows, often appearing almost 
as if in one row toward the base, where they become smaller, but are 
of the normal cup-shaped form, with finely denticulate rims and 
slender pedicels; the tips of both ventral arms are much injured, 
but small, normal, long-pedlceled suckers can be traced to the tip of 
the left arm; the right arm is denuded of its skin and suckers at the 
tip. The suckers of the four lateral arms are in two rather close 
rows, larger, oblique, low cup-shaped, attached by slender pedicels, 
which are somewhat swollen just below the suckers; most of them 
have lost their horny rings; marginal membranes rudimentary. Web 
between the arms, rudimentary. Tentacular arms very long and 
slender, in alcohol about twice the length of the mantle; a few 
scattered, sessile suckers are found along the whole length of the 
arms; tentacular club well-developed, long-ovate, oblique, with a 
thick wrist and flat or concave sucker-bearing face; suckers small 
and very numerous, crowdedlv arranged in many rows (probably 
sixteen rows or more), some of the middle ones larger than the rest; 
