204 The Irish Naturalist. 



rarer than IT. rwnicis ; //. triUneatus, Tallaght. Orchestes ilicis, occurred 

 twice in the Lucan Demesne (new to Ireland); Bagous alismatis, 

 occurred in the Royal Canal, last summer ; Gymnetron labilis, in 

 numbers on a railway bank near Portmarnock (new to Dublin list) ; 

 A nthonomus ubni, Portmarnock ; A. rub?', frequent, Lucan, etc.; Ceuthorrhynckus 

 i ricce, Howth and Bray Head, common ; C. Utura, I obtained this species 

 off thistles, in several localities, Portmarnock, Santry, Castleknock, 

 etc. ; Mr. Cuthbert has taken it at Maynooth, and Rev. W. F. Johnson 

 in Co. Donegal ; it is remarkable how T such a conspicuous insect could 

 have been so long overlooked ; Ceuthorrhynchidiusfloralis, in moss, Dodder 

 bank, Terenure ; EubrycTdus velatus, I found this interesting species at 

 Santry by sweeping near a pond, in early summer, and again, last 

 November, it occurred in large numbers in the chinks and under the bark 

 of pieces of wood left on the mud at the edge of the pond (new to the 

 Dublin list) ; Magdalis armigera, Santry last summer I took one specimen 

 off a young birch tree, and recently another off elm. (I cannot find an}^ 

 other Irish record). Its occurrence on the above-mentioned trees is 

 worth recording, as in England it is usually obtained in dead twigs 

 and hedges. — J. N. Halbert, Dublin. 



BIRDS. 



Flock of Wild Geese at Kingstown.— When on the platform of 

 the Kingstown railway station on Friday the 21st ult., during the regatta, 

 my attention was called to a flock of Wild Geese which was passing 

 over the Club House (R. St. George), going S.E. There were seven 

 geese going in single file. It is the first flock I have seen under the 

 circumstances, and the passage of these birds during the month of July 

 may be a matter worth bringing under the notice of naturalists ; hence 

 my short note.— J. P. O'REiiyi/Y, Dublin. 



Sand Martins nesting in a Ruin. — Mr. R. Warren writes to 

 Zoologist for August that during last week in June he observed a number 

 of Sand Martins nesting in deep crevices between the stones of the ruined 

 castle on Garrison Island, Lough Cullen, Co. Mayo. 



GEOLOGY. 



Ctenacanthus denticulatus, IYI'Coy. — To the geological collec- 

 tion of Belfast Museum there has lately been added a specimen of a fossil 

 fish spine representing Ctenacanthus denticulatus. M'Coy. For this species 

 the late Mr. Davis, in his valuable monograph of the fishes of the British 

 Carboniferous Limestone, records only one locality, namely — " Monaduff, 

 Drumlist, North of Ireland, 1 " Monaduff is not in the North of Ireland : 

 the correct citation is Monaduff, Drumlish, Co. Longford. The Memoirs 

 of the Irish Geological Survey give us very little palseontological 

 information as to this place. They do not record this species, but mention 

 is made of undetermined fragments of fish remains at Monaduff. The 

 exact locality is Monaduff, quarries on south side of road to Arvagh, about 

 two miles north-east of Drumlish. The specimen now in Belfast Museum 

 is from the Carboniferous shales at Cultra, Co. Down. It is from the 

 collection of the late James MacAdam, F.G.S., and has been presented by 

 his brother, Mr. Robert MacAdam. The genus Ctenacanthus is stated by 

 Davis to occur only in the shales underlying the Coal Measures and this 

 holds good so far as our specimen is concerned. The rocks at Monaduff 

 are described in the Survey memoir as dark gray sandy shales and flags, 

 a description which answers equally well for the Cultra locality. 

 Another resemblance is the occurrence oiModiola MacAdamiiaX Monaduff, 

 so that both lithological and palseontological characters indicate that 

 the beds exposed in Longford and in Down are of similar age. — S. A. 

 SticwarT, Belfast. 



1 Davis, Scicnt. Trans., Roy. Dublin Soc, part 25, 1883. 



