86 



The Irish Naturalist. 



February, 



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ALCYONARIA. 



[H. J. B.-W.]. 



Alcyonium dlgitatum (L.)— Common under large overhanging 

 rocks between tide-marks near Carrickdorrish. 



HYDROZOA. 



[J. S. & H. J. B.-W ]. 



The following Calyptoblaslic Hydroids were collected by Mr. A. R. 

 Nichols : — 



Coryne fruticosa (Hicks). 

 Tubularia indivisa (L.). 

 Haleclum halecinum (L.). 

 Campanularia flexuosa 



(Hincks). 

 Clytia Johnston! (Alder). 

 Dlpharla rosacea (L ). 



Sertularella polyzonias (L). 



Sertularia pumila (L). 



S. opereulata (L.). 



S. abietina (!,.)• 



S. argentea (Ellis &Solander). 



Hyd rail man la falcata (L). 



Antennularia antennina(L). 



PORIFERA. 



BY ROBHRT KIRKPATRICK. 



Sycon compressum (Fleming). 

 S. coronatum (Ellis & Solander). 

 Halichondria pan icea (Pallas). 

 Dcndoryx incrustans (Esper). 

 Pachychalina limbata (Mont.). 



Hymeniacidon carunculum 



(B.) 

 H. sanguineum (G.) 

 Ophlitaspongia serlata (G.) 

 Cellius angulatus (B.) var. 



These were principally found at Carrickdorrish and along 

 the seaward side of the island. 



Dcndoryx incrustans was living on the underside of an over- 

 hanging rock ledge. Spicula : — megascleres— long thin oxeas, 

 and monactinal entirely spined stylij microscleres — isochelse, 

 andsigmata. Skeleton reticulate. The smooth thin oxeas of 

 the ectosome are arranged in separate clumps. . 



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