1865.] MR. W. H. FLOWER ON PHYSALUS ANTIQUORUM. 701 
of the same to middle of umbilicus 4 feet 5 inches—the latter being 
thus 27 feet 5 inches distant from the end of the tail. 
One of the most striking points in external conformation in which 
this Whale differs not only from all known toothed Whales, but from 
Balena, Megaptera, and even most of the Balenopterina, at least if 
the published figures of these animals are correct, is the great verti- 
cal depth of the much compressed caudal portion of the trunk, which 
changes little from the dorsal fin to the commencement of the lateral 
expansion, where the upper and lower sharp margins suddenly begin 
to converge, running as a strong keel for half the length of the flukes. 
The long, narrow, and pointed flukes have the hinder margin nearly 
straight. They presented in a very marked manner a peculiarity 
noticed by Dr. Murie in his account of a Fin-Whale captured at 
Gravesend *, viz. that they do not set out, at least the anterior part 
of them, in the same plane from the middle line of the tail, but the 
right one sweeps at first upwards, and is therefore convex above, the 
left one sweeping as much downwards, and being therefore concave. 
This affects chiefly the anterior and inner third of each fluke; the 
posterior edges and outer ends appeared to lie in an even plane. 
The furrowed region of the under surface commenced at about the 
middle of the lower jaw, and extended exactly as far back as the um- 
bilicus, and on each side to the axille. The furrows were not sym- 
metrical on the two sides of the body ; they frequently divided at very 
acute angles, and united sometimes to the same, and sometimes to 
adjoining furrows ; their general depth was 3 inch, and the intervals 
between them from 2 to 3 inches. The penis was extruded, and 
about 6 feet in length, cylindrical at the base, and regularly tapering 
towards the extremity. Its orifice did not resemble that described 
and figured by Dr. Muriet, but was single and terminal, with a 
deeply lobed margin. Immediately behind the root of the penis 
were two longitudinal grooves, about 10 inches long, 13 inch deep, 
and 3 inches apart, slightly converging posteriorly. Each of these 
lodged a much compressed nipple, which reached in height to a level 
with the edge of the groove, and measured 13 inch from before 
backwards, and rather less than + inch from side to side. They 
were of a pink colour, and had a soft, finely nodulated surface. These 
organs thus differed totally in situation from the rudimentary nipples 
ot the male Porpoise, which are lodged in a single deep cavity be- 
hind the penis, having a minute aperture on the surface in the 
median line of what may be called the perineum. The male mam- 
mary organs of the Cetacea were first described by Pallas in the 
Beluga, but appear to have remained unnoticed by any other author, 
until Eschricht verified their presence and fully described them in 
many different species. 
The chin terminated in front by a slightly elevated vertical ridge ; 
on each side of this were scattered somewhat irregularly, and extending 
over a space of 9 inches in length and 23 inches in breadth, twenty- 
five distinct deep circular pits, mostly surrounded by a dark-coloured 
* Proc. Zool. Soc. 1865, p. 210. 
+ Ibid. p. 214. t Lee. p. 83. - 
