1907. 



Kirkpatrick. — Porifera of Lambay. 



87 



Pachychalina limbata was a small sponge of a pale trans- 

 lucent fawn colour growing round the branches of Coralli?ia 

 officinalis. 



Hy7neniacidon Carunculum. — There are two sizes of tylostyles 

 (or pin-shaped. spicula), and with this exception this sponge 

 agrees with Bowerbank's description of the species, as he only 

 mentions styles. The large dermal tylostyles measured '36mm. 

 long; the small thin dermal tylostyles measured -24mm. long. 



Hymeniacidon sanguineiim when alive was red, but when 

 examined from spirit was a dark brown and dirty grey in 

 places. 



[Gellius angulatus does not appear to have been previously 

 recorded from Ireland ; the Lambay specimen was found at 

 low water near Carrickdorrish. Miss J. Stephens found that 

 the dimensions of the various spicules differed from those 

 given in " Challenger " Report for G. angulatus, but that the 

 specimen otherwise agreed closely with the description of 

 this species. Mr. Randolph Kirkpatrick has kindly compared 

 it with Bowerbank's type in the British Museum, and considers 

 it a variety of G. angulatus, though he is in some doubt as to 

 whether it should not be regarded as a new species ; he has 

 also sent me the following list (with accompanying remarks) of 

 the comparative measurements of the spicules of the type 

 and the Lambay specimen :— - 



£<?., the oxeas of II. are considerably smaller but otherwise 

 with same characters as I. ; the toxa of II. are longer, and the 

 sigmata smaller, but again of about the same character in 

 other respects. — A. R. N.] 



