138 PROF. OWEN ON NEW AND RARE CEPHALOPODA, 
in the usual alternate disposition (Pl. XXVI. fig. 1, 1,3). The dorsal pair (1) of arms are 
the shortest and most slender; the third and fourth (ventral) pairs are the longest and 
thickest. Only the basal part of the stem of the left tentacle, p, remains in the specimen 
described. 
On each side of the base of the funnel is a narrow elongate cartilage, g, excavated for 
the reception of a cartilaginous prominence, 7, of similar form, from the juxtaposed 
inner surface of the muscular mantle. The infundibular tube is shown slit open along 
the ventral wall, exposing the terminal valve, s. The masses of the “ musculi retractores 
infundibuli” are shown at ¢,#. The anterior or descending aorta, wv, is drawn from 
the intervening recess of the above muscles. The posterior aorta has been removed near 
its origin,v. The systemic ventricle is transversely elongate and bent at a right angle, 
as in Sepia. 
The vena cava, w, is partly withdrawn from the intermuscular recess; and its two 
divisions, with their glandular tunics, are shown diverging to the lateral branchial hearts, 
x, v, each of which has a small fleshy appendage. The margin of the gill lodging the 
branchial vein is shown aty. The trunkof each vein enters the contiguous end of the 
transverse ventricle, the right rather more advanced than the left. The branchial lamelle 
are narrow and numerous. 
The digestive viscera, agreeing closely with those of Sepia, have been removed to bring 
more clearly into view the circulatory, respiratory, and generative organs. A part of the 
liver, with its peritoneal capsule partially reflected, is shown at z. 
The testis, a, occupies a peritoneal compartment at the hinder end, or fundus, of 
the abdominal cavity; on removing the serous coat, as in the figure, the fibrous 
tunic is exposed. To a part of the inner surface of this membrane are attached the 
seminal tubes, which diverge and branch dichotomously, filling the cavity, and ter- 
minating blindly. They are bathed in the seminal fluid, which escapes by rupture of 
the tubules into the fibrous sac, whence it escapes by a foramen leading to a long, 
slender and tortuous “vas deferens.” This tube opens into a larger one, the size of 
which is chiefly due to the thickness of its fibrous and glandular parietes, which present 
narrow transverse plice toward the cavity of the present canal, which has been termed 
a “vyesicula seminalis:” it is shown at ¢. The anterior end of the “vesicula ” 
communicates with a second, oblong, blind glandular sac (ib. d): it has been compared 
to a “prostate gland.” Without sanctioning such homologies with the parts so called 
in the mammalian class, it is certain that the seminal fluid or spermatozoa are packed into 
capsules, contributed by the glandular parts of the above accessory organs, the capsules 
being therein moulded into the filamentary form, These “ spermatophora” are con- 
veyed by a short and wide duct to an oblong pouch, f, sometimes called (after the 
naturalist and theologian who first drew attention to the moving powers of the fila- 
ments) “ Needham’s pouch” (Sursa Needhami). A short canal conducts the spermato- 
phores to the base of the penis, h, 
