1 62 The Irish Nahiralist, Julvi 



Crista cornuta, C. denticidata, Idmojiea serpens, Diastopora 

 i)atina, D. obelia, *Tiib7ilipora lobulata, Licheiiopora hispida. 



Those from Rathliii Island, taken from a depth of from 15 

 to 17 fathoms, number 33 species, namely : — 



Gem el I alia loricata, Scrupo cell aria scftcposa, *S. scrupea, 

 Caberea Ellisii, Cellaria sinuosa, C. fistnlosa, C. Johnso7ii, 

 *Flust7'a foliacea, Membtanipora pilosa, '^M. catcinilaria, 

 *AIicroporella Maltisii, Schizoporella spinifera,, S. linearis, '^S. 

 siinplex, S. unico77iis, "^ Hippo thoa divaricata, Porella coiichina^ 

 * Mtic7'07i ella veiitricosa, M. coccinea, M. Feachii, *Phylactella 

 labi'osa, Cellep07'a ariculaiis, C piuiiicosa, C dichofo7)ia, C 

 costazii, C7'isia dcTitictilata, ^C ebti7 7iea, C coriiiita, Idmo7iea 

 se7pe7is, Diastopora obelia, D. pati7ia, Liche7iopo7a hispida, 

 *A77tathia le7idigera. 



Those species marked with an asterisk are not common to 

 both collections. Of some of these species, such as Cellaria 

 si7itiosa, C.fishilosa, and Cellep07'a aricularis, there are numerous 

 fragments, man}^ very likely belonging to one colon}^ ; of 

 others, such as Me77ibra7iiporella 7iitida, Phyladella labrosa, &c., 

 there are only a few small bits. 



Sometimes these are adhering to broken shells, but oftenest 

 they are chipped off these. 



These fragments of colonies, with all trace of the living 

 animals dissolved from them, are beautiful microscopic 

 objects, the details of the cells being well preserved, showing 

 their shining or opaque surfaces, their perforations and 

 spines. Ovicells are present on several — on Crisia, 

 Scrtipocellaria, and Me77iabranip07'a, &c. 



The species have all been recorded as found off the 

 northern shores of Ireland or as generally distributed, with 

 the exception of Cellaria Joh7iso7ii, which I have only seen 

 recorded from Shetland. 



The fragments of this form have no avicularia present, but 

 the characteristic shape of the cells is plainl}- discernible. 



Aigburth Hall Road, Liverpool. 



