ZOOLOGICAL AND BOTANICAL ASSOCIATION. 279 



Cusquinny, Cork Harbour. A most minute species, with 1 -septate 

 spores. 



7. A. dispersa (Duf.). Specimen on the bark of holly collected by 

 Miss Hutchins, and preserved in the Herbarium Royal Cork Institution, 

 under the name of Opegrapha epipastaf 



This remarkable species resembles A. astroidea, var. epi pasta, very 

 closely, but may be at once distinguished from that and all other British 

 species by the large, broadly ovate, muriform spores. 



Chiodecton (Fee). 



1. C. albidum (Tayl). Sijncesia albida (Tayl.) in FL Hib. Kerry ! 

 Dr. Taylor in Herb. Moore. Co. Antrim ! D. Moore. 



A paper was read from Robebt Patterson, F. R. S., Corresponding 

 Member, Belfast — 



ON A NEW NAKED-EYED MEDUSA. 



The size of the first specimen that came under my notice on the 14th 

 June, 1859, was about one inch; at first it was rather more, for the 

 upper portion, which, when the animal was in full vigour, presented 

 a mitred appearance, became much collapsed. The genus Turris, dis- 

 tinguished from Oceania by the possession of muscular bands, was 

 evidently that to which it belonged. Its size, independent of other 

 characteristics, distinguished it at once from Turris neglecta, while its 

 four bands of yellowish muscular fibre marked it as distinct from 

 T. digitalis, which rejoices in double that number. The bands were 

 very conspicuous, and, looked at through a lens, were not plain along 

 their margins, but furbelowed, reminding one of the Laminaria. Where 

 the band joined the margin of the disk there were, at either side, 

 three tentacula ; three more occupied the space between, so that each 

 compartment had nine tentacula, being 36 in all (3 x 3 x 4). They 

 seemed equally distant from each other, if looked at horizontally; but, 

 viewed from above, and when the animal was at rest, they arranged 

 themselves gracefully in groups of three. They were highly contractile, 

 extending at times to between two and three inches. The colour at the 

 base was yellow ; not the bright yellow of gamboge, but a more sober 

 tint, inclining a little to brown. The extended filaments were perfectly 

 colourless. Between some of the tentacula, minute tubereh « wore no- 



ZOOL. ft BOT. SOC. PKOC. — VOL. I. 2r 



