ISODICTYA. 131 



" I received from my friend Mr. Higgin, on the 21st 

 of September, 1874, three specims of Isodictya clava 

 from extreme low-water mark in Caernarvon Bay. 

 They were found pendent from the under sides of 

 large stones. These specimens differed essentially in 

 size and form from the type ones represented. One 

 of them was of the same form as the specimen repre- 

 sented by fig. 7, Plate LIII, vol. iii, but rather larger 

 in its proportions. It was evidently the base of the 

 sponge, there being about the eighth of an inch in 

 length projected from its distal extremity of the same 

 diameter as the fragment represented by fig. 9. 

 Another specimen without the base was of the same 

 diameter as fig. 9, but it was an inch and three 

 quarters in length, and terminated dichotomously at 

 its distal extremity in two short prongs. These 

 specimens afibrd us a much better idea of the normal 

 form of the species than those represented as the 

 types of the species. Their anatomical structures 

 were in perfect accordance with those of the type- 

 specimens. These interesting specimens belong to 

 the Liverpool Museum." 



35. Isodictya jdgosa, Bow., ii, 296; iii, PI. L, figs. 

 11—14 



1867 Gellius jugosus, GriLj. Proc. Zool. Soc, p. 538. 



Habitat. — NuUipore dredged near the entrance of 

 Westport Bay, Co. Mayo, is remarkable on account of 

 the large number of rare sponges which grow upon it, 

 nestling among the branches, and filling up the spaces 

 between them. One of these sponges was returned 



