242 The Irish Naturalist, 



IVIastlgrocoIeus testarum. 



Picctonema terebrans. 



Comontia polyrhiza. 



Conchocells rosea, new to West of Ireland. 

 V Tellamia? 



Aranmore.— Low water was caught at Killeany Bay (Kilroiiau) on the 

 east side of the Island, and in addition some scraps of sea- weeds were 

 gathered on the west side, a little east of the fort Dun Aengus. Ordinary 

 shore-collecting is almost impossible on the west side, owing to the 

 precipitous cliffs, and ocean swell, even on a comparatively cahn day. 

 Several interesting weeds were obtained on the west side, indicative of a 

 rich harvest after a westerly gale or by dredging. Killeany Bay proved a 

 splendid locality for the perforating algje (all the species recorded in Miss 

 Hensman's recent paper in the Irish Naturalist being found here), and 

 iox \.\).^ Sqtiamariacccv, a group of red sea- weeds, coating stones, &c., and 

 of which Pdrocelis and Pcyssonndia are examples. This group is at its 

 best in the winter. In the quiet pools, with the abundant disintegrat- 

 ing mollusc shells, and the stone-coating Squamariaccic:, were found 

 quantities of Stilophora rhizodcs, and several species of Cystoscira, including 

 the iridescent C. ericoides infested with Myriadis ptilvinata. The meeting of 

 the southern and northern types, noticed in the fauna of the district was 

 illustrated in several ways ; thus Plumarici degans, a southern form, and 

 Ptilota plumosa, a northern closely allied form, were both found; Pycno- 

 phycus tubcrcidatus, a brown alga which is erroneously supposed to reach 

 its northern limits in Galway Bay, was also found. 



Of the less-known forms may be mentioned — 



Conimophyllum BulftiamI on Nitophyllum laceratu7n\ new to 

 Ireland. 

 Dermocarpa prasfna ] Latter new to, and former not recorded 

 D. Schousbdet > for Ireland. 



Growing on a rock exposed at half-tide was a form of Codium^ not un- 

 like the Codium amphibiwn of Harvey's " Phycologia Britanuica." Some 

 time must elapse before all the material collected has been examined, 

 many of the rarest weeds being microscopic and time-absorbing in their 

 determination. Our thanks are due to Miss Sydney Thompson of 

 Belfast for a collection of attacked shells, to Miss Kelsall for some 

 Kilronan weeds, and to Mr. R. J. Mitchell, whose health has prevented 

 him from taking part in the determination of the weeds he helped to 

 collect. 



