[215] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 425 



any such spoon-shaped appendage as is found in the preceding species. 

 Buccal membrane large, with a free thin edge which scarcely forms 

 angles. 



Pen (fig. 3a) with a narrow, linear anterior portion, consisting of more 

 than half its length, decreasing in width backward, then suddenly ex- 

 panding into the posterior portion, which is broad and thin, and infolded, 

 so as to form a large, compressed posterior cavity; the anterior portion 

 is concave beneath, with no mid-rib, the edges ex-curved and slightly 

 thickened; when spread out and flattened the posterior portion has a 

 lanceolate form, rather abruptly widening anteriorly and very gradually 

 tapering backward, with a double midrib, and some delicate lines par- 

 allel to it, while the lateral expansions are very thin and delicate. 



The teeth on the odontophore (Plate XLV, fig. 3b) form seven rows: 

 the median ones have a large, acute, central, and two small lateral den- 

 ticles ; the inner la teral teeth have a large, acute inner denticle, and 

 a very small outer one ; the next to the outer teeth are somewhat stouter 

 than the outermost, which are very acute and strongly curved; no mar- 

 ginal plates were observed. 



Color of body mostly destroyed, in the typical specimens, but small, 

 light purplish brown chromatophores are uniformly scattered over the 

 parts best preserved; this is also the case on the head, siphon, and outer 

 surfaces of the arms, where the skin is well preserved; scattered spots 

 also occur on the inner surfaces, between the suckers. 



The male described above has the mantle 62 mm long; length of caudal 

 fin, 31; its breadth, 36; end of tail to base of arms, 85; length of dor- 

 sal arms, 20 ; of second pair, 48 ; of third pair, 45 + (tips gone) ; of fourth 

 pair, 35; of tentacular arins., 118; of sucker-bearing portion of club, 16; 

 breadth of tentacular arms, 2; of club, 4; of lateral arms, at base, 3.5; 

 of ventral arms, 3; diameter of eye-ball, 8; of largest suckers of 

 lateral arms, 1.2; length of pen, G2; of anterior, narrow portion, 38; 

 its breadth anteriorly, where widest, 2; where narrowest, 1.25; length 

 of posterior portion, 24 ; its breadth, 8 mm . 



The supposed female has lost the tail, but the arms are in better con- 

 dition than those of the male; it differs from the male in having dis- 

 tinctly smaller suckers on the lateral arms. Length of dorsal arms, 

 27 mm ; of second pair, 44; of third pair, 4G; of fourth pair, 37; of ten- 

 tacular arms, 120; of club, 16 mm . 



A larger specimen (station 994), which has lost its head and pen and 

 therefore cannot be positively identified, has a much darker color. It 

 is dark purplish brown over the whole body. 



Two typical specimens were obtained off Martha's Vineyard, at sta- 

 tions 1031 and 1033, in 255 and 1S3 fathoms; one, of doubtful identity, 

 at station 994, in 3G8 fathoms, by the U. S. Fish Commission, in 1881. 

 All three were from fish- stomachs. 



This interesting species was named in honor of Dr. T. H. Beau, the 

 ichthyologist, who took charge of the fishes on the "Fish Hawk" this 

 season. 



