Mr. W. Thompson on the Crustacea of Ireland. 105 



J. L. Drummond thus obtained two of them from fish brought to 

 Belfast market. In a cod taken near Carrickfergus, I once found a 

 fine male G. rugosa ; its length of body from base of eyes to extre- 

 mity of tail-plates, 3 inches ; its arm from base to point of claw, 5£ 

 inches. Another individual was found in the mouth of a haddock 

 captured at Killough, county Down. Mr. R. Ball in one instance pro- 

 cured three specimens from the stomach of a cod taken at Youghal. 

 Dr. Leach remarks " that the G. rugosa appears to be a very rare 

 species in Britain," and so may it likewise be considered on the Irish 

 coast. It is probably one of those species not to be found in numbers 

 anywhere. 



A G. rugosa has been kindly sent to me from Portpatrick by Cap- 

 tain Fayrer, R.N. Several small individuals were dredged alive in 

 water from 110 to 140 fathoms in depth off the Mull of Galloway. 

 See 'Annals/ vol. x. p. 23. None of them exceeded 1-| inch in 

 length of body. 



Among the genera of Crustacea which possess a luminous pro- 

 perty when living, Galathea is included, and the species particu- 

 larized is the G. amplectens, Fabricius (McCulloch's West. Isles, 

 Scotland, vol. ii. p. 192), observed by Sir Joseph Banks on the coast 

 of Brazil. It is perhaps not worth remarking, that in a dead speci- 

 men of G. rugosa I observed the same property. On the evening of 

 the second day after it had been kept in a warm room, the entire soft 

 portion of its under surface was highly luminous. 



Galathea squami/era, Leach, Mai. pi. 28 A; Edw. Crust, t. ii. p. 275. 



Is marked Irish in Mr. J. V. Thompson's catalogue. It is our 

 most common species of Galathea, and is found on all sides of the 

 island. It is not uncommonly dredged up by us in the loughs of 

 Strangford and Belfast, the specimens being generally of a small 

 size. In the Ordnance collection are examples from Portrush, 

 near the Giant's Causeway. At Lahinch, county Clare, two of the 

 G. squami/era were procured by us under stones between tide-marks. 

 Specimens from Youghal and the western coast are in Mr. R. Ball's 

 collection. 



Captain Fayrer, R.N., has favoured me with this species from 

 Portpatrick. 



Galathea nexa, Embleton, Proceedings Berwickshire Club, p. 71. pi. 1. 

 " I have found it in the stomachs of cod-fish brought from the coasts 

 of Down and Antrim to Belfast market ; and in Dr. Drummond's 

 collection are specimens which were similarly procured. A compa- 

 rison of one of these with an original specimen in Dr. Johnston's 

 possession, proved (what from its agreement with the description and 



figure I had previously little doubt of) the identity of the species." 



W. T. in ' Annals,' vol. v. p. 255. 



Palinurus vulgaris, Leach, Mai. pi. 30 ; Edw. Crust, t. ii. p. 292 ; 



Desm. p. 184. pi. 32. 

 Astacus homarus, Penn. Brit. Zool. vol. iv. p. 22. pi. 12. 



The spiny lobster is found sparingly on the north, but commonly 

 on the south coast. Smith in his ■ History of Kerry' remarks that one 

 side of Dingle bay " is noted for having very large cray-fish;" and 



