Appendix C. 38, 



recently sent me by Mr. Robertson, he having again taken 

 it in the month of July of this year (1890), at Kilchattan, 

 Buteshire. 



MARINE MITES. 



Trombidium fucicolum, G. S. Brady, Proc. Zool. Soc. London, 

 1875. Dr. Brady says, " One adult and one young speci- 

 men of this species were washed from among the roots of 

 algas gathered between tide marks in Roundstone Bay, 

 Ireland, by Mr. David Robertson." 



Cheyletus Robertsoni, G. S. Brady, Proc. Zool. Soc. London, 

 1875. As to this species see page 377. 



Schistostoma longisetosum, G. S. Brady, Proc. Zool. Soc. 

 London, 1877. Dr. Brady observes, "One specimen only 

 of this remarkable species was noticed in a gathering of 

 entomostraca taken by Mr. Robertson in an old canal at 

 Petershead." 



SPONGIAD^E, (see page 265). 



The new species obtained in Westport Bay, co. Mayo, and in 

 Galway, on the Irish expedition which Messrs. Robertson and 

 Norman made together, were named as follows in Bowerbank's 

 " Monograph of the British Spongiadae," vol. iv., edited, with 

 additions, by the Rev. A. M. Norman, M.A., F.L.S.,&c., 1882 : 



Microciona tumulosa, Bowerbank. 

 Hymedesmia pansa, Bowerbank. 

 Hymedesmia pilata, Bowerbank. 

 Hymedesmia pulchella^ Bowerbank. 

 Hymedesmia tenuicula, Bowerbank. 

 Hymeniacidon armiger, Bowerbank. 

 Hymeniacidon solidus, Bowerbank. 

 Hymeniacidon callosus, Bowerbank. 

 Hymeniacidon tenebrosus, Bowerbank. 

 Halichondria flabellifera, B o werbank. 

 Isodictya ferula, Bowerbank. 

 Isodictya perplexa. Bowerbank. 

 Isodictya crassa, Bowerbank. 

 Isodictya paupercula, Bowerbank. 

 Isodictya trunca, Bowerbank. 

 Isodictya coriacea, Bowerbank. 



