272 REPORT — 1902. 



gregarine, surrounding which can be easily seen the epithelium of the 

 vessel. 



All mine at this time had still very few nuclei — in many cases only 

 two, though the septum had disappeared — but in three or four cases 

 they had three nuclei, all of about equal size, and no sign of a fourth. It 

 was evidently rather early in the year for sporulation stages. 



That nuclear division may go on before evagination of the vessel's 

 wall I have found by cutting the two gregarines figured whole in the 

 paper above referred to. For in one of them there were eight nuclei, and 

 still traces of a septum ; in the other very many nuclei, with no longer a 

 septum ; in both cases the nuclei consist of aggregations of chromatin 

 without any membrane. 



In no case have I yet found many nuclei. It would be necessary to 

 obtain the gregarines later on in June and July to observe sporoblasts, ifcc. 



For that reason I cannot now present a more detailed account, but 

 hope to obtain further stages in the future. 



With regard to the bodies in Pecten opercularis, I found them fre- 

 quently in some batches, while from others they would be absent. This 

 was probably connected with the different localities from which they 

 were dredged by the trawlers. They also occurred in a few Pecten maxi- 

 mus, but not in one or two oysters I examined, nor in any other of the 

 many Lamellibranchs I looked at. They occurred invariably on the gills 

 and never once on the mantle-flap again, which was rather contrary to 

 expectation. 



But until I have further examined them, and feel more certain as to 

 what they are, I will withhold a description of them. 



Investigations in the Laboratory of the Marine Biological Association 

 of the West of Scotland at Millport. — Report of the Committee, con- 

 sisting of Sir John Murray (Chairman), Dr. J. F. Gemmill 

 (Secretary), Professors Bower, Cossar, Ewart, W. A. Herdman, 

 and M. Laurie, and Messrs. Alex. Somerville and J. A. Todd. 



The Committee have to report that they allotted 151. of the grant to 

 Dr. James Rankin for an investigation of the Compound Ascidians of 

 the Clyde area, and 10^. to Mr. Alex. Patience and Mr. Thomas Scott, 

 F.L.S., for an investigation of the Crustacea of the Northern Clyde 

 lochs. 



Mr. Patience obtained through his grant the use of the s.y. ' Mermaid ' 

 belonging to the Millport Marine Station for twelve days in May and 

 July 1902. He took in all fifty-five hauls with the dredge and trawl, 

 chiefly in Loch Fyne, Loch Long, Gareloch, and Loch Goil. His interim 

 report to the Committee makes mention of two new Bopyrids — Pleuro- 

 crypta patiencei (Scott), and Pleurocrypta cluthct (Scott) — found by him 

 and described by Mr. Thomas Scott in the 'Annals and Magazine of 

 Natural History.' His report jointly with Mr. Scott also contained many 

 details regarding the distribution of the smaller Crustacea in the Clyde 

 lochs, but it will be presented to the Committee again when finished. 



Dr. James Rankin, as a result of his Ascidian investigation, reports 

 that he has three papers in hand, viz. (1) Second Report on the Tunicata 

 of Millport and neighbourhood, including description of Polycarpa cinerea. 



