of the Fishery Board for Scotland. 303 



Dactylopus brevicornis, Clans. 



1866. Dactylopus brevicornis, Claus, op. cit., p. 29, t. iii. figs. 



20-25. 

 1880. Dactylopus brevicornis, Brady, loc. cit., vol. ii. p. 118, pi. 



lvii. figs. 10-12; pi. lviii. 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 

 antennae, 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. ii. p. 119, pi. lxvii. 



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. ii. p. 123, pi. 



lxi. figs. 9-14. 



Habitat. — 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 filth feet, are sufficiently characteristic to allow of this species being 

 readily distinguished from other Thalestris ; it seems to be a rare species. 



Thalestris clausii, Norman. 



1868. Thalestris clausii, Norman, 'Brit. Assoc. Report,' p. 297. 

 1873. Parathalestris clausii, Brady and Robertson, ' Ann. and 



Mag. Nat. Hist.,' vol. xii. p. 136. 

 1880. Thalestris clausii, Brady, loc. cit., vol. ii. p. 128, pi. Ixii. 

 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. ii. p. 131, pi. 



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. 



