of the Fishery Board for Scotland. 258 
the case. The incurved position of the posterior portion of the abdomen 
and caudal furca is also a more or less constant feature in this species 
so far as regards all the specimens examined, Except for the somewhat’ 
abnormal form of the fifth pair of feet, the species appears to be a typical 
Cletodes. 
Dactylopus tenwiremis, Brady and Robertson. 
1895. Dactylopus tenuiremis, Brady and Robertson, Brit. Assoc. 
Report, p. 197. 
This apparently rare species occurred in the shore gathering collected to 
the east of Invergordon, Cromarty Firth, in November 1897. There is 
no previous record of Dactylopus tenutremis from the Moray Firth district. 
It is a somewhat critical species, but appears to be distinct. 
Dactylopus minutus, Claus. 
1863. Dactylopus minutus, Claus, Die frei-lebenden Copep., 
p. 126, Pl. XVI., figs. 14-15. 
This Dactylopus occurred amongst a number of other things in a 
gathering from Station VI. (Firth of Clyde) collected 1st September 1898. 
It is a comparatively small species and appears to be rare. 
Thalestris helgolandica, Claus. 
1863. Thalestris helgolandica, Claus, Die frei-lebenden Copep., 
palo BY XVI, fies. 12-21. 
This rare species was obtained in a bottom tow-net gathering from 
Station IV. (Kilbrennuan Sound, Firth of Clyde) on 24th August 1898. 
The Rey. A. M. Norman has also obtained Vhalestris helgolandica in the 
Firth of Clyde. This species of Vhalestris, as well as Thalestris hibernica, 
has been found recently in some material dredged in 1886 a little to 
the west of Invergordon, Cromarty Firth, but both appear to be scarce. 
Cylindropsyllus fairliensis, sp. n. (Pl, X., figs. 11-14; Pl. XI, figs. 1-4). 
Description of the Female.—The body is elongate, slender, and ey lindri- 
eal. The length of the specimen figured is 1°73mm. (nearly 3} qs of an 
inch), Uhe thorax is composed of five distinct segments, the first of which 
is rather longer than the combined lengths of the next two, but the 
second to the fifth are sub-equal. The abdomen is also composed of five 
distinct segments; the first to the fourth are of nearly the same length as 
the posterior thoracic segments, the last being about one and a half times 
the length of the penultimate segment. The caudal furce are short and 
broad; the interior half of the apex of each is somewhat produced and 
bears a long and moderately stout seta and two or three small hairs; the 
exterior portion of the apex is abruptly concave, the concavity being 
bounded externally by an acute angle, and interiorly by the produced 
setiferous portion just referred to and as shown in the figure (fig. 6, Pl. 
XI). The rostrum is short. The antennules are moderately short and 
stout, eight-jointed; the first four joints are larger than the last four, a 
stout asthetask springs from the produced upper angle of the fourth joint; 
the fifth joint, which is smaller than any of the others, is only about halt 
the length of the preceding one; the next three are sub-eqnal and some- 
what longer than the fifth (fig. 1, Pl. XI.). The formula shows approxi- 
mately the proportional lengths of all the joints— 
' Numbers of the joints, ee ee radar) De Ones fais 
Proportional lengths of the joints, 22°15:16°12-:6:°10:11°19 
t 
