PHYSICAL FEATURES OF 
CRUSTACEA . 
Balanus balanoides 
Verruca, sp. 
Cancer pagurus 
MOLLusca : 
Anomia ephippium 
Lima elliptica 
Pecten opercularis 
P. pusio 
Cardium edule 
Venus casina 
V. ovata 
Nucula nucleus 
Mytilus edulis 
Saxicava rugosa 
Tapes, sp. 
Mactra solida 
Pectunculus glycimeris 
THE IRISH SEA. 19g 
Acmea testudinalis 
A, virginea 
Emarginula fissura 
Flelcion pellucidum 
Trochus magus 
T. millegranus 
T. cinerartus 
Pleurotoma, sp. 
Pi, Sp: 
Murex erinaceus 
Phasianella pullus 
Natica, sp. 
Buccinum undatum 
Capulus hungaricus 
Cyprea 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.; Ectinosoma sarsii, Boeck ; E. melaniceps, Boeck; E. erythrops, Brady ; 
E. gracile, T. & A. Scott; TZachidius brevicornis, Miller ; Stenhelia, n.sp.;  Stenhelia, 
n. sp.; Ameria longipes, Brady; A. longicaudata, T. Scott; A. Tejlexayee. Scott;) A. 
gracile, n. sp.; Mesochra macintoshi, T. & A. S.; Paramesochra dubia, T. Scott; Tetra- 
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.; D. flavus, Claus; D. brevicornis, Claus; Thale- 
stris rufocincta, Norman; T. peltata, Boeck ; Harpacticus chelifer, Miiller ; Zaus spinatus, 
Goodsir; Z. goodsiri, Brady; Idya gracilis, T. Scott; Lichomolgus fucicolus, Brady; L. 
furcillatus, Thorell; Dermatomyzon nigripes (B. & R.); Ascomyzon thompsoni, n.sp. ; 
Acontiophorus scutatus, 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, Seutellidium fasciatum, 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 
greca, Eulima polita, Pagurus prideauxii, Ophiothrix fragilis, Ophicoma nigra, Adamsia 
palliata, Sertularia abietina, Antennularia ramosa, Hydrallmania falcata, 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, 
