PHYSICAL FEATURES OF THE IRISH SEA. 



CRUSTACEA . 



Balanus balanoides 



Verruca, sp. 



( \nicer pu urns 

 MOLLUSCA : 



Anomia ephippium 



Lima elliptica 



Pecten opcrcularis 



P. pusio 



Cardium edule 



Venus casina 



V. ovata 



Nucula nucleus 



Mytilus edulis 



Saxicava rugosa 



Tapes, sp. 



Mactra solida 



Pectunculus glyctmeris 



Acmcea testudinalis 

 A, virginea 

 Emarginula fissura 

 Helcion pellucidum 

 Trochus magus 

 T. miUegramis 

 T. cinerarius 

 Pleurotoma, sp. 

 P., sp. 



Murex erinaceus 

 Phasianella pullus 

 Natica^ sp. 

 Buccinum undatum 

 Capulus hungaricus 

 Cyprcea europea 

 Nassa incrassata 

 Rissoa, sp. 

 R,, sp. 



From a bag of this shelly Neritic deposit (A), described above, Mr. Andrew Scott 

 has by careful examination managed to extract the following 36 species of Copepoda, 

 of which 4 are new records for our district and 8 others seem new to science : Pseudocyclops 

 obtusatus B. & R. ; Ectinosowa sarsii, Boeck ; E. melaniceps, Boeck ; E. erythrops, Brady ; 

 E. gracile, T. & A. Scott ; Tachidius breviconris, Muller ; Stenhelia, n.sp. ; Stenhelia, 

 n. sp. ; Ameria longipes, Brady; A. longicaudata, T. Scott; A. nflexa, T. Scott; A. 

 gracile, n. sp. ; Mesochra macintoshi, T. & A. S. ; Paramesochra dubia, T. Scott ; Tetrn- 

 goniceps consimilis, T. Scott ; Laophonte thoracica, Boeck ; L. curticaudata, Boeck ; 

 Pseudolaophonte aculeata, n.gen. and n.sp. ; Normanella attenuata, n.sp. ; Dactylopus 

 stromii, Baird ; D tenuiremis, B. & R. ; 1). flavus, Claus ; D. brevicornis, Claus ; Thole- 

 stris rufocincta, Norman ; T. peltata, Boeck ; Harpacticus chelifer, Muller ; Zaus spinatns, 

 Goodsir ; Z. goodsiri, Brady ; Idya gracilis, T. Scott ; Lichomolgus fncicolus, Brady ; L. 

 furcillatus, Thorell ; Dermatomyzon nigripes (B. & R.) ; Ascomyzon thompsoni, n.sp. ; 

 Acontiophorus scutatns, B. & R. ; and two other species which have not yet been 

 worked out. * 



Mr. Thompson has also identified from a sample of the same deposit which he 

 examined a number of the above species, and in addition the following five : 

 Porcellidium, sp., Ameira attenuata, Laophonte spinosa, ScuteUidium fasciatuw, and 

 Artotrogus orbicularis, making 41 species of Copepoda in all. 



These 41 species, added to the 99 species from the same haul noted above and to 

 the following 16 species recorded from the trawl at the time when the haul was taken, 

 make in all 156 species : Mytilus modiolus, Pecten tigrinus, Trochus zizyphinus, Fissurella 

 graca, Eulima polita, Pagurus prideauxii, Ophiothrix fragilis, Ophicoma nigra, Adamsia 

 palliata, Sertularia abietina, Antennularia ramosa, Hydrallmania fnlcata, Tubularia, sp., 

 Glycera, sp., Amphiporus pulcher, Flustra foliacea. It ought to be remembered, however, 

 that a good many (by no means all) of the Mollusca and a few of the Polyzoa were dead. 



All the above new species have since been worked out and described by Mr, Scott, 



