2190 Part III —Twenty-fijth Annual Report 
with some doubt, to this genus, especially as only the females had at 
that time been noticed. The discovery of additional specimens allowed 
a more thorough examination to be made of the structure of the species, 
and it then became evident that its place in ‘Zaophonte was untenable, 
and this rendered its removal to another genus— Harrietella—necessary. 
But while the female of this species has been known for a number 
of years, the male has apparently remained undescribed. JI, therefore, in 
the following additional notes on the species, include a short description 
of the male form. 
The species is a very small one, the female being scarcely half a milli- 
metre in length, but the male is still smaller. It is a demersal form, and, 
like a number of other such forms, its distribution is somewhat restricted. 
I have rarely noticed H. stmulans among the numerous bottom forms 
occasionally captured with the dredge, even at some of the more favour- 
able collecting grounds in the Firths of Forth and Clyde; yet when a 
piece of decaying wood, the surface of which is perforated by boring 
molluscs or crustaceans, 1s brought up in the dredge or trawl net, 
numerous examples of this particular Copepod may be obtained living 
apparently in the crevices of the wood. When the pieces cf decaying 
wood are carefully removed from amongst the other debris and washed in 
a bottle containing methylated spirits, and the sediment examined under 
a hand lens, quite a number of little animals may sometimes be obtained. 
In Laophonte the body.is usually of a narrow, oblong form, but in 
Harrietella it is broadly ovate and considerably depressed ; and while in 
Laophonte the female carries only one ovisac, there are two in Har- 
rietella. In the structure of the mouth appendages—the mandibles, 
maxillee, and maxillipeds—there is a fairly close resemblance between the 
two genera, and the same may be said concerning the two pairs of 
antenne and the first pair of thoracic feet. The second and third pairs 
in both the male and female, and especially in the male, though in their 
general structure somewhat resempling those of Laophonte, they are 
distinctly more robust. In both pairs the inner branch is composed of 
two sub-equal joints, the first being rather shorter than the other. In 
the male, the inner branch of the second and third pairs, which does not 
reach the end of the second joint of the outer branch, is furnished with 
two apical sete. The outer branch is elongated and stout, and composed 
of three joints of nearly equal length; the first and second are each 
provided with a single moderately-long spine on the outer margin, and 
the third joint, which is furnished with a similar spine on the outer 
edge, bears also three strong terminal spines (fig. 3 represents one of the 
second pair of feet). The fourth pair in the male resembles that of the 
female in having the inner branch short, narrow, and uni-articulated, 
and provided with two short apical sete ; but while the outer branch in 
the female is two-jointed, that of the male consists of three joints, the 
first two being each provided with a moderately long and stout plumose 
seta on the outer margin, and the third with four similar sete round 
the distal extremity. The outer branch of the fourth pair in the male, 
like the same pair in the female, is remarkably stout (fig. 4). 
The fifth pair in the male consists of an oblong basal joint, provided 
with a spiniform seta on the inner distal angle and a setiferous appendage 
on the outer, and a small one-jointed branch bearing a few plumose 
bristles (fig. 5). | 
Tn the male, the last two segments of the metasome, though nearly 
uniform in width with those of the urosome, are distinctly narrower than 
the preceding segments, and in this respect there is a marked difference 
between the two sexes when seen from above. 
i 
4 
: 
( 
4 
| 
