DESCRIPTION OF A NEW COPEPOD. By Tuomas Scort. 
(Pl. VIL. figs. 7-12.) 
Artotrogus papillatus, n, sp.—In general appearance this species is not 
very unlike A. Normani, Brady and Robertson. 
The first segment is equal in length to rather more than half of the 
whole body, or as 21 is to 19. 
The anterior antennz are eight-jointed, stout, bearing comparatively few 
sete, and each is terminated by a long curved olfactory appendage. The 
relative lengths of the joints are as follows :— 
ese eT 8 
14,44, 14,9. 12.11. 14.29 
The terminal joint has a distinct curved band stretching across it near the 
middle, which in certain positions gives it the appearance of being two- 
jointed. 
The last joint of the posterior antennz is about as long as the two pre- 
ceding ones, and terminates in a rather long slender spine. 
The maxillz resemble very closely those of Dyspontius striatus, Thorell. 
The second pair of foot-jaws are rather powerfully clawed, and bear 
each a single spine at the distal end and on the inner aspect of the second- 
last joint. 
The outer margins of the joints of the outer branches of the swimming 
feet are fringed with minute close-set spines, and the outer terminal 
angles of the first and second joints are armed with one stout lancet- 
shaped, and one small spine; the third join‘ has three such pairs of spines 
on its outer edge, and terminates in a sabre-like spine which has its outer 
edge finely serrate. The inner margins of these joints are clothed some- 
what similar to those of A, magniceps, Brady. 
The integument of the cephalothorax is thickly covered with small 
conical papille. 
This species has, like A. Normani, an elongated abdomen; the last 
joint is dilated distally, and is rather shorter than the third, while the 
second-last is shorter and narrower than either; the caudal appendages 
are stout and about as long as the last abdominal segment; each bears 
three setze, the inner one is sbort and slender, and the other two long, the 
middle one being considerably the longest; on the outer edge of each 
appendage, and about a fourth of its length from the free end, there is 
inserted in a kind of notch a short plumose seta. Length, one-twentieth of 
an inch (1°3 mm.). 
One specimen only of this form was obtained among material dredged 
in the vicinity of Inchkeith. This solitary specimen was a female, and 
does not agree with any species known to me. DrG.S. Brady, F.R.S., 
and Mr J. C. Thomson, F.L.S., to whom I submitted the specimen, have 
also been unable to assign it to any described species. Mr Thomson, 
who has recently been working very largely at Copepoda, both of British 
and foreign seas, was at first of opinion that it is not impossible that it 
may be found to belong to the genus Dyspontius,; but the differential 
characters cannot be completely made out without dissection, and I do 
not wish to destroy the specimen for that purpose. 
Professor Ewart has suggested that the species should be named A. papil- 
latus, which has been adopted. 
I am indebted to Mr W. L. Calderwood for the drawings which 
accompany this description. 
