56 Proceedings of the Royal Irish Academy. 



the rough bottom, half way between the Cable Rock and the Moul- 

 ditch buoy ; I failed to find any others, though I frequently searched 

 the rocks round Bray Head at low water for the littoral species, and 

 kept a fairly shai^p look out on the contents of the dredge for the deep- 

 sea forms. However, it is very likely that the minuter species may 

 have come up attached to bunches of sea-weed, and escaped unde- 

 tected, for I was unable to work over all the material with a lens. Of 

 the shell-bearing Gasteropods the following were taken : — Nassa reti- 

 culata, Neptunea antiqua, Fusus islandicus, F. propinquus, Murex 

 arinaceiis, M. corallinus (scarce), Buccunum undatum, Purpura lapillus, 

 Natica catena (fairly plentiful), Velutina Icevigata, Aporrhais pes- 

 pelicani (occasionally), Turritella communis (infrequent), Troplion 

 muricatus (one specimen noticed, though others may have been taken, 

 and overlooked owing to the small size of the members of this genus), 

 Troclms cinereus, Tr. %i%yphinus (very finely coloured specimens), 

 Pileopsis hungaricus, Littorina littorea, L. rich is, Patella indgata, 

 Selcion pellucidum. Of the Polyplacophora, specimens of Chiton 

 cinereus and Ch. asellus were not unfrequently obtained. Of the 

 Lamellibranchiata the following representatives occurred : Pholas 

 dacti/lus {rather scarce), Saxicava anglia {scarce), Psammohia ferroensis, 

 Tellina crassa, Venus gallina, V. fasciata, Tapes virginea, Cyprina 

 islandica, Astarte sidcata, Ast. elliptica, Cardium rusticum, Cardium 

 norvegicum, Cardium edule (a single much-worn valve), Pectunculus 

 ghjcimeris, Ifytilus edulis, Modiola sp. (two very young specimens), 

 Nucula micleus, Pecten maximus, Pect. varius, Pect. opercidaris (ex- 

 quisitely coloured examples), P. tigrinus, Hinnites pusio, Lima Mans, 

 Ostrea edulis (of extremely large size), Anomia ephippium. This is a 

 very scanty list, but its poverty is easily explained. The best ground 

 for shells is the pebbly bottom south of the Moulditch Bank ; but as 

 this is barren of zoophytes, and indeed of nearly everything but shells, 

 I always hauled the dredge as soon as we got off the rough ground 

 and went northward again. I believe from what I saw that the mala- 

 cological fauna of Greystones would prove decidedly rich if carefully 

 explored. 



Arthropoda. — Arachnida were represented by specimens of Nym- 

 phon grossipes, and Pycnogonum, which were frequently found amongst 

 zoophytes, seaweeds, &c. The Crustacea included the following : 

 Stenorhynchus phalangium (very abundant), ITyas araneus, H. coarcta- 

 tus (one specimen), Cancer pagurus {in rock pools, and not unfrequently 

 taken in the siene nets), Carcinus nicenas, Portunus pid)er, P. pusillus 

 (common, and showing a considerable amount of variation in the 

 prominence of the trilobed frontal process), Ebalia Pennantii (one 

 female specimen), Atelecyclus heterodon (one specimen), Pagurus lern- 

 hardus, P. prideauxii, P. ciianensis, P. ulidianus (one specimen in a 

 Trochus shell), Munida rondeletii (one young specimen, the rostrum 

 being feebly developed), iZb/reffn^s vulgaris, Porcellana lonyicornis {not un- 

 common in deep water), Pandalus annulicornis (frequent and very finely 

 coloured), TaUtrus locusta. The rough bottom between Bray Head 

 and the Moulditch is rich in Decapods : a single haul of the dredge 



