362 Proceedings of the Eoyal 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. Thersites, Pagenstecher, 1861, preoccupied by Spence 

 Bate in 1857 for a genus of Amphipods.) 

 259. Thersitina gasterostei (Pagenstecher). 



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

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



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



(April 1899), p. 444. 



1900. Thersites gasterostei, T. Scott, Eigliteenth F. B. Rept., pt. iii. 



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



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

 Stickleback, G-asterosteiis 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 spinaehia, captured in Loch Etive, on the 

 west of Scotland. 



Division NOTODELPHYOIDA. 



Family Notodelphyd^. 



Genus (112) Notodelphys, Allman, 1847. 



260. Notoclel2Jhys Albnani, Thorell. 



I860. Notodelphys Allmani, Tliorell, Bidrag til Kiiniied. Krust. Art. 



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



fie. 1. 

 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. 

 1S78. ,, ,, Brady, /.c, vol. i. p. 130, pi. xxvi.figs.1-10. 



Hah. — In the branchial cavity of Ascidians found adhering 

 to the pier at Granton. 



