MARINE BIOLOGICAL STATION AT PORT ERIN. 15 



twenty-five species of hydroid zoophytes and twenty- 

 three species of polyzoa. 



III. From March 29 to April 4 the Committee were 

 working from Port Erin, and had the s.s. ' Lady Loch ' 

 hired for two of these days. One day was spent in dredg- 

 ing on the rocky bottom round the Calf and near the 

 Chicken lighthouse, and in exploring the caves about 

 Spanish Head and the Stack Kock. These caves can only 

 be entered in a boat in calm weather at low tide; and the 

 sides and roof are so closely covered with masses of bright 

 red ascidians (Polycarpa glomerata), black and white 

 sponges {Pachymatisma johnstoni and Stelletta colling si), 

 and tufts of Tubularia indivisa, that scarcely any rock is 

 visible. Amongst the more noteworthy animals dredged 

 round the Calf and obtained on the neighbouring shores 

 were the rare calcareous sponge Ute glabra, Gorynactis 

 viridis, Hyalinoecia sp., Depastrum cyathiforme, Linens 

 gesserensis, Dinophilus toeniatus (breeding at Easter), 

 fifteen species of hydroids, including Aglaophenia tubuli- 

 fera, Halecium tenellum, Lafoea dumosa form robusta, L. 

 fruticosa, Cuspidella costata and G. humilis ; the brachio- 

 pod Crania anomala ; the Crustacea Xantho tuber culata, 

 Ebalia tuber osa and E. tumefacta, Galathea dispersa (one 

 with a parasitic Bopyrian), Spirontocaris spinus (one with 

 a parasitic Bopyrian), Janira maculosa, Tritceta gibbosa, 

 Amphithoe rubricata, Aora gracilis, Gonilera cylindracea, 

 Moera othonis, Metopa (? n. sp.), and others ; the mollusca 

 Spinalis retroversus, Bissoa cingulus, var. rupestris, 

 Fissurella groeca, Emarginula fissura, Chiton Icevis, 

 Pleurobranchus plumula, Lima elliptica and L. loscombii, 

 Astarte sulcata and A. triangularis, Solecurtus antiquatus, 

 Lyonsia norvegica, Pecten tigrinus and P. testae, Kellia 

 suborbicularis, Pandora inoequivalvis, Lamellaria per- 

 spicua, Circe minima and Thracia distorta, the two last 



