A Botanical trip to Comity Antrim. 169 



Festuca durluscula, L.— Glenariffe. 



Agropyron acutum, R. & S.— Sandy shore, Red Bay. 



A. marlnum, h. — Benevenagh cliffs, Co. Derry. 



Cystoptcrls fragllls, Bernh. — Sparingly on Benevenagh cliffs. 



Polystlchum Iobatum, Presl and var. aculeatum Syme.— Glen- 

 ariffe and Glendun. 



Lastrea FNIx-mas, L.— Some enormous specimens noticed in 

 Glenariffe with fronds nearly five feet in length. 



Botrychlum Lunaria, Sw — There was not a frond of this to be 

 seen at Cushendun on the sandy ground near the shore where Mr. 

 Brenan told me it can usually be found in hundreds. The long drought 

 had probably shortened the season of grow th for this as well as for so 

 many other herbaceous plants. 



HYDROIDS AND POLYZOA COLLECTED BETWEEN 

 LAYTOWN AND THE MOUTH OF THE BOYNE- 



BY J. E. DUERDEN, A.R.CSC. (l<OND.) 



The material upon which the following report is based, was 

 collected along the shore from Laytown to the mouth of the 

 River Boyne, a distance of about three miles, on the occasion 

 of the visit of the Dublin Naturalists' Field Club on the 16th 

 June, 1894. Except at the mouth of the Boyne the shore is 

 one stretch of sand, there being none of the rock-pools which 

 generally reward the collector of zoophytes so liberall}\ 

 In all twenty-three species of Hydroids and twenty species 

 of Polyzoa were obtained, which had been washed up from 

 more or less considerable depths. Two of the Hydroids, 

 Gonothyrcea hyalina, Hincks, and Sertularia gracilis, Has- 

 sall, are new to Ireland. Of the former a fine colony was 

 found growing profusely on Zostera, and exhibiting the 

 characteristic irregularly ovate gonothecae. It is a rather rare 

 hydroid, and is mentioned by Mr. Hincks (Brit. Hyd. Zooph., 

 p. 185) only from Shetland, amongst British localities. 

 Sertnlaria gracilis is closely allied to the very common *S. 

 pumila, Linn., but is much more delicate in all its parts, and 

 is not exclusively littoral. 



Diphasia attcnuata, Hincks, and Plamularia similis, Hincks, 

 were collected. They are rather rare forms, each having been 

 previously recorded from only two Irish localities. 



At the mouth of the Boyne a few rock-pools are found, and 

 the water is slightly brackish. Obclia gclatinosa, Pallas, was 

 obtained, and C amp anul aria flextiosa, Hincks, was abundant 

 on the under side of the stones. 



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