DUBLIN NATURAL HISTORY SOCIETr. 15 



as it has already formed the subject of an interestiiig paper from its re- 

 diBcoverer there, Dr. Farran. I will just state, that in Britain generaUy 

 it has been recorded as having been found at Edinburgh, by Dr. Howden, 

 there may be some mistake here, as P. hohatus does not occur in his 

 list at all, and it is also included in a list of Moray Firth Crustacea, but 

 P. hohatus is also omitted here, and all along the south coast of England; 

 it has not occurred as yet on the south coast of Ireand ; but I am sure, 

 if sought, it will be found there too. It is a Mediterranean species, and 

 very distinct from both P. holsatus and P. depurator, Galway, 1857. 



Gonoplax angtdatus, — A single specimen was shown me, obtained on 

 the shore, near the quay, living, after a heavy gale. I sought it myself 

 in vain. 



This species is a most puzzling one in its distribution, and un- 

 doubtedly local where it does occur. It has occurred on the coast of 

 Dublin, as specimens, in the possession of Dr. C. Farran and Dr. R. Ball, 

 prove. 



Distribution :— Bangor, Co. Down (0. C), Dublin (R. B. and C. F.), 

 Cork (J. V. T. and R. B.), Valentia Island, Roundstone (Prof. Melville). 



It is possibly a southern species, following that peculiar line of dis- 

 tribution to which I have already alluded; that is to say, south, west, and 

 north of Ireland, and, for a limited distance, down the north-east coast. 

 However, further research may prove it be an inhabitant of the entire 

 eastern coast It is a Mediterranean species. 



Pagums strehlonyx. — General in its distribution round Ireland, occur- 

 ring north, south, east, and west. 



Porcellana platychdes. — Exceedingly common under stones, the spe- 

 cimens varying much in colour. 



Distribution : — Carrickfergus (W. T.), Portmamock, Co. Dublin, 

 Valentia Island, Kilkee, Tory Island (W. T.). A very local species on 

 the eastern coast, though just as large as the northern specimens. 



Porcellana longicomis. — Common in the deep rock-pools, among 

 Corallina officinalis. 



Distribution : — Strangford (0. C), Dublin, Ardmore, Youghal, Valen- 

 tia, Lahinch, &c. A very common and very generally distributed species. 



Galathea squamifera. — Rare among the deep rock-pools of rather 

 large size ; one specimen only obtained ; it appears to be generally dis- 

 tributed around Ireland. About Dublin, though smaU specimens are 

 common in the lobster-pots and the dredge in the laminarian and 

 coralline zones, adult specimens are seldom captured. It has occurred 

 as follows : — Portrush (0. C), Dublin, Youghal (R. B.), Valentia Island, 

 Birterbie Bay (W. M'C). 



Palinurua vulgaris. — In lobster-pots. This is essentially a western 

 species, but obeys the same law of distribution as Portunxts arcuatuSy 

 Xantho floriday &c. It has occurred at Magilligan (0. C), Youghal 

 (R. B.), Valentia, and west coast generally. I can find no record of 

 its having occurred on the eastern coast. Though fishermen have told 

 me of its occurrence in Dublin Bay, I never succeeded in getting speci- 

 mens of it. 



