of the Fishery Board for Scotland. 303 
Dactylopus brevicornis, Claus. 
1866. Dactylopus brevicornis, Claus, op. cit., p. 29, t. ii. figs. 
20-25. 
1880. Dactylopus brevicornis, Brady, loc. cit., vol. u. p. 118, pl. 
lvii. figs. 10-12; pl. lviu. fig. 14. 
Habitat.—Largo Bay, dredged April 1891. The dredge brought up a 
quantity of broken weeds, zoophytes, &c., which yielded a large number of 
Entomostraca and other organisms, including several not previously ob- 
served in the Forth. D. brevicornis has very short and stout anterior 
antenne, by which it is readily distinguished. 
Dactylopus minutus, Claus. 
1863. Dactylopus minutus, Claus, ‘Die frei lebenden Copepoden,’ 
p. 126, t. xvi. figs. 14, 15. 
1880. Dactylopus minutus, Brady, loc. cit., vol. 1. p. 119, pl. Ixvii. 
figs, 12-14. 
Habitat.—Largo Bay, with the last, a small species with two ova-sacs ; 
only a few specimens were obtained. A somewhat large but slender form 
of Dactylopus was of frequent occurrence in the dredged material from 
Largo Bay, which, as far as I could make out, appears to be a variety of 
D. tisboides, Claus. The more typical form of the species having the 
pellucid markings on the outer branch of the fifth feet also occurred. 
Thalestris helgolandica, Claus. 
1863. Thalestris helgolandica, Claus, ‘Die frei lebenden Copepoden,’ 
p. 131, t. xvii. figs. 12-21. 
1880. Thalestris helgolandica, Brady, loc. cit., vol. 1. p. 123, pl. 
lxi. figs. 9-14. 
Hatbitat.—Largo Bay, with the others. One or two specimens that 
appeared to belong to this species were obtained. The form of the second 
foot-jaw, the long slender spines of the first feet, and the peculiar form of 
the fifth feet, are sufficiently characteristic to allow of this species being 
readily distinguished from other Thalestris ; it seems to be a rare species. 
Thalestris clausiz, Norman. 
1868. Thalestris clausii1, Norman, ‘ Brit. Assoc. Report,’ p. 297. 
1873. Parathalestris clausii, Brady and Robertson, ‘Ann. and 
Mag. Nat. Hist.,’ vol. xii. p. 136. 
1880. Thalestris claustt, Brady, loc. cit., vol. 1. p. 128, pl. lxu. 
figs. 1-12. 
Habitat.—Largo Bay, frequent among weed dredged in 7 to 8 fathoms. 
This is a robust species, the first feet are stout, with strong and com- 
paratively short terminal claws. 
Thalestris rufo-violascens, Claus. 
1866. Thalestris rufo-violascens, Claus, ‘ Die Copepoden-Fauna von 
Nizza,’ p. 33, t. iv. figs. 18-22. 
1880. Thalestris rufo-violascens, Brady, loc. cit., vol. li. p. 131, pl. 
lxi. figs. 1-8. 
Habitat.—Largo Bay, obtained in the same dredging with the last. This 
is apparently a rare species; as yet I have only observed one or two 
specimens. The only other British localities where it has been obtained, 
so far as I know, are those mentioned in Dr Brady’s monograph, viz., 
‘Shetland and Firth of Clyde.’ Dr Brady has kindly examined one of the 
Forth specimens, and corroborated my diagnosis. 
