A. E. Yerrill — North American Cephalopods. 
405 
but the broad base is oblique, aud the outer border is sloping, with- 
out a prominent angle. 
The pedicels of the larger suckers on the tentacular club are very 
peculiar. They are, when extended, long and remarkably stout, 
their diameter being more than half that of the sucker. They are 
cylindrical, and ax*e capable of being invaginated, toward the sum- 
mit, so that they can be lengthened out or very much shortened by a 
sort of telescopic motion. The upper end is thick, and fits the basal 
part of the broad sucker like a piston. (PI. LY \ fig*- 6, 6a.) 
Two additional examples of this interesting species have been re- 
ceived. They are not in so good condition as the one originally 
described. The head and arms alone remain, but these are well 
enough preserved to show the characteristic color-marks. The first 
is considerably smaller than the specimen taken by Capt. Collins. 
It was taken from a cod, on the western part of the Grand Bank, 
X. F., by Capt. Johnson and crew, of the schooner “Augusta John- 
son,” (lot 962). Presented to the U. S. Fish Commission, June, 1881. 
The last specimen was taken in 180 fathoms, near the X. E. part of 
George’s Bank, and presented to the TJ. S. Fish Commission by 
Capt. Chas. Anderson and crew, of the schooner “Alice G. Wonson,” 
October, 1881, (lot 980). 
Brachioteuthis, gen. nov. 
Allied to Chirotenthis. Differs in having the lateral connective 
cartilages of the siphon simple, long-ovate, and the corresponding 
cartilages of the mantle in the form of simple, linear ridges ; a rhom- 
bic caudal fin ; pen with a simple, linear, anterior portion, suddenly 
expanding into a much broader, lanceolate, posterior portion, which 
is naturally infolded; arms slender, the ventral ones not distinctly 
obliquely compressed ; tentacular club without a spoon-like cavity at 
tip. 
The siphon has a valve and dorsal bridle as in Chirotenthis, and 
the suckers, so far as preserved, are similar, but those of the club are 
more numerous, and their pedicels apparently had a less prominent 
bulb below the sucker. 
In addition to the following new type-species, this genus probably 
includes the Chirotenthis Bonplandii Veranv, from the eastern At- 
lantic. 
B. Bonplandii, as figured, has a very similar pen, but the shape 
of the caudal fin is different, and the arms are more nearly equal in 
length. The arms are also represented as having small swellings at 
the tips. Its tentacular arms are not known. 
