ZOOLOOICAL AND BOTANICAL ASSOCIATION. 143 



During the course of the day we landed on the Breakwater, and I 

 was much struck by the immense numbers of Allorchestidae — a family 

 which has never occurred to me in Dublin. Allorchestes imbricatus 

 swarmed all along high water-mark. 



The following Echinodcrmata occurred : — 



Comatula rosacea. — Very common. 



Ophiura texturata. — Not so common as in Dublin. 



Ophiocoma granulata. — One specimen ; a perfect pest in Dublin. 



Ophiocoma rosula. — Not so common as in Dublin. 



Uraster glacialis. — One small specimen ; common in Dublin. 



Uraster rubens. — Common. 



Cribella oculata. — Three specimens ; very common in Dublin. 



Asterina gibbosa. — One specimen on Leek Bank ; not met in Dublin. 



Echinus miliaris. — Two or three specimens. 



Echinus sphara. — One young specimen. We were not dredging on ground 



where this species generally abounds; they grow to a very great size 



off this coast, 13 or 16 inches in circumference. 

 Amphidotus cordatus. — One specimen. 



Tliis group, on the whole, was remarkably deficient as regards num- 

 ber of specimens, as contrasted with Dublin Bay dredgings. 



I spent several days examining the littoral zone which supplied the 

 following : — Orchestia littorea, and 0. lavis, abundant ; Allorchestes Da- 

 na i, common ; Talitrus locusta, not rare; Ligia oceanica, Porcellio scaber, 

 and Philoscia muscorum, abundant. 



There were well-marked differences in the distribution of the aqua- 

 tic species of this zone, especially at the borders of the Laminarian 

 zone ; not merely as contrasted with those which occur in Dublin Bay, 

 but also in the case of those which are found at Yalentia Island, the 

 difference in the latter case being probably due to the fact of the influx 

 of the Plym. 



Carcinus mono*. — Abundant 



Cancer pagurus. — In great abundance, markedly more so than in Va- 



lcntia or Dublin. 

 Pilumnus hirtellus. — The common crab of the beach ; extremely rare 



both in Dublin and Valentia. 



