362 Proceedings of the Royal Physical Society. 



obtained on a specimen of the same kind of fish captured off 

 Kinnaird Head in July 1901. 



Genus (111) Thersitina, Norman, 1905. 

 (Syn. Ther sites, Pagenstecher, 1861, preoccupied by Spence 

 Bate in 1857 for a genus of Amphipods.) 

 259. Thersitina gasterostei (Pagenstecher). 



1861. Thersitcs gasterodei, Pagenst., Arch. f. Naturh., vol. xvii. 

 p. 118, pi. vi. figs. 1-9. 



1899. Ergasilus gasterostei, Bassett-Smith, Proc. Zool. Soc. Lond. 



(April 1899), p. 444. 



1900. Ther sites gasterostei, T. Scott, Eighteenth F. B. Rept., pt. iii. 



p. 146, pi. v. figs 1-7. 



Hah. — On the inside of the gill-covers of a Three-spined 

 Stickleback, Gfasterosteus aculeatus, captured in the river 

 Forth, near Alloa, in February 1896. I have also taken this 

 minute Copepod on the same species of fish captured in a 

 small loch in Barra, Outer Hebrides; and in brackish- water 

 ditches at Aberdeen, as well as on a Fifteen-spined Stickle- 

 back, Gasterosteus spinachia, captured in Loch Etive, on the 

 west of Scotland. 



Division NOTODELPHYOIDA. 



Family Notodelphydj. 



Genus (112) Notodelphys, Allman, 1847. 



260. Notodelphys Allmani, Thorell. 



I860. Notodelphys Allmani, Thorell, Bidrag til Kanned. Krust. Art. 



Slagtet Ascidia, p. 31, pi. i., and pi. ii. 



fi<r.'l. 

 1878. ,, ,, Brady, Monograph, vol. i. p. 126, 



pi. xxv. figs. 1-10. 



Hah. — In the branchial cavity of Ascidians found adhering 

 to the walls of Granton Harbour, and dredged in the neigh- 

 bourhood of Inchkeith and elsewhere ; moderately frequent. 



261. Notodelphys agilis, Thorell. 



I860. Notodelphys agilis, Thorell, I. c, p. 40, pi. iv. ; pi. v. fig. 6. 

 1878. ,, ,, Brady, I.e., vol. i. p. 130, pi. xxvi. figs. 1-10. 



Hah. — In the branchial cavity of Ascidians found adhering 

 to the pier at Granton. 



