of the Fishery Board for Scotland. 205 
short, two-jointed, the outer three-jointed branches also short, but rather 
longer than the inner branches; exterior marginal spines of the outer 
branches elongate, slender ; inner and outer branches provided with very 
long, slender, and blunt-pointed terminal filaments (fig. 25). Inner 
branches of second, third, and fourth pairs very short, one-jointed ; the 
intermediate terminal seta of both branches of the second and third pairs 
very long and sparingly plumose (fig. 26). Intermediate terminal seta of 
the inner branches of fourth pair not reaching much beyond the end of 
the outer branches. Fifth pair very small, almost rudimentary; basal 
joint furnished with four subequal plain sete, and the secondary joint 
with five setze of unequal length (fig. 28). Caudal stylets short, their 
breadth equal to about two-thirds the length ; primary caudal seta equal 
to the combined length of the last abdominal segment and stylets, the 
other setze minute. The last four abdominal segments are adorned with 
three to four transverse rows of minute cilia, and the posterior margins of 
thoracic and abdominal segments are fringed with aculeate setz, as shown 
in figure. 
Habitat.—Vicinity of Inchkeith. February 1893. Dredged; rare. 
This species, which is doubtfully referred to Cletodes, differs from that 
genus in having the inner branches of all but the first pair of the swim- 
ming feet one-jointed, but as it agrees with Clctodes in most of the other 
important characters, and as no male has yet been obtained the structure 
of which might have assisted in more satisfactorily indicating the affinities 
of the species, it seems better in the meantime to place it in the genus 
Cletodes. One peculiar character of the species that distinguishes it from 
almost all others of the genus to which it is referred, is the long terminal 
filaments of the first pair of feet ; they do not appear to be hairs or seta 
in the proper sense, but have rather the appearance of filamentous con- 
ferva. There can be no doubt, however, that they are organically connected 
with the first feet, and are not accidental parasitic growths. 
Genus, Platychelipus, Brady (1880). 
Platychelipus littoralis, Brady. (Pl. V. figs. 11-13.) 
; 1880. Platychelipus littoral, Brady, ‘Mon. Brit, Copep.,’ vol. il. 
p. 103, pl. Ixxix. figs. 20-23 ; pl. xxx. figs. "15-19. 
Habitat.—Forth estuary, near Culross, and also off Musselburgh. 
This well marked species was of frequent occurrence in the material 
collected off Musselburgh. The long, curved, claw-like, and spiniform 
terminal seta of the inner branches of the first pair of swimming feet (fig. 
12), together with the Enhydrosoma-like form of the animal, enable the 
species to be distinguished almost at first sight. Platychelipus is well 
described and figured by Dr Brady in the ‘Monograph of the British 
‘Copepoda.’ Ido not know of any previous record of it from the Scotch 
coasts. 
Genus, Dactylopus, Claus (1863). 
Dactylopus rostratus, sp. nu. (provisional name). (Pl. III. figs. 7-20.) 
This copepod, for which I propose the provisional name Dactylopus 
rostratus, closely resembles Dactylopus flavus, Claus, in some structural 
details, and may be a large variety of that species. (Dact, ylopus rostratus 
is 1 mm. in length, whereas Dactylopus flavus is little more than half that 
size.) But besides being nearly double the size of Dactylopus flavus, it is 
readily distinguished from that species by the prominent and bluntly- 
rounded rostrum, which, like Delavalia palustris, is provided with two 
