5714 Crustacea. 



List of the Podophthalmous Crustacea occurring in Dublin Bay and 

 the adjacent Waters. By John R. Kinahan, M.B., M.R.I. A., 

 &c, &c. 



The value of local lists is now generally acknowledged. The fol- 

 lowing, therefore, needs no apology. All the species, with a very few 

 exceptions noted, have occurred, living, to myself; and most of them, 

 including that rare crab, Periraela denticulata, have been under my 

 observation in the vivarium for a considerable time. The district in 

 which they occurred includes the seaboard between Bray Head on the 

 South and Skerries on the North ; but the majority of the species 

 have occurred in the bay between Dalkey Island and Howth. This 

 district comprehends the following localities : — Merrion, a clear, open 

 sand, with a few sand pools ; Salt Hill and Sandycove, rocks with rock 

 pools, and a limited Zostera-clad sand bank ; Dalkey Sound, a rocky 

 channel, in some parts muddy bottom, in others shingle, and in others 

 a clear sand and nullipore, a strong tide running through it. This 

 affords almost all the species noted, many of the deep-sea species 

 being taken here, especially in the spawning season, in six to eight 

 fathoms water. None of the other localities call for note, except the 

 Scallop Bed, which is a sandy bank, lying about nine miles from 

 shore off Bray, with from nine to fifteen fathoms water on it. 



Long-legged Spider Crab {Stenorhynchus Phalangium, Penn. sp.) 

 Common in laminarian and coralline zones. Sometimes thrown 

 ashore after high gales, entangled in masses of zoophytes. Many 

 specimens agree in part with the details of S. tenuirostris : these are 

 chiefly from the deeper waters. Local name " Spiders." In ova in 

 January. 



"Scorpion Spider Crab" (Tnachus dorsetiensis, Leach). Not com- 

 mon. Found entangled in the fishermen's lines off Howth ; also 

 dredged in Dalkey Sound, and off Bray Head. 



Inachus Dorynchus, Leach. Not uncommon. In shallower water 

 than last, and occasionally drifted in after gales. 



Great Spider Crab {Hyas araneus, Linn, sp.) Very common 

 among rocks beneath overhanging sea-weed near extreme low water. 

 Large specimens from the fishermen's lines when set in the shallow 

 waters. Dredged in tidal streams abundantly. Local name " Tin- 

 ker." In ova in February; exuviates in March. 



Hyas coarctatus, Leach. Very common, being abundant in the 



