CKUSTACKA — Wll ITKLEGGE. 137 



Tlie .smaller objects in the t'ulluwin^ list have been tietenuined 

 by means of a hand-lens ; the specimens are so numerous and so 

 closely packed that it is difficult to brin<,' them into focus, owinj; 

 to a miniature forest of projectin<^ stems, branches and worm tubes. 

 Were it possible to apply the microscope direct the numbei' of 

 species might be considerably increased ; these niinarks apply 

 more especially to tlie Polj^zoa, wliich cannot be determined in 

 their present position, and their removal from the stone would 

 entail their destruction as well as the objects near tliem. 



The following is a list of the species attached to the stone, and 

 also of the free or active ones, as ascertained by an examination 

 of the residue of the fresh-water washing : — 



FORAMINIFERA. 

 ATTACHED OR FIXED. ACTIVE OR FREE. 



Polytrema miniaceum, Linn. 

 Haliphysema, sp. ' 



PORIFERA. 



Sycoii gelatinosuin, Blainv. 



„ sp. 

 Ute, sp. 

 Hii'chiia, sp. 



Alcyonaria. 



Juncella, sp. 



Acanthoisis Jiahellum, Wright and Studer. 

 Plumarella penna, Lamarck. 

 Prhnnoella australaslce, Gray. 



„ grandisquama, Wright and Studer. 



Telesto smithii, Gray. 

 Cornularia ? australis, Busk. 



Madreporaria. 



Balanophyllia bairdiana, Edwards and Haime. 

 Plahellum, sp. 



ECHINODERMATA. 



Antedon tnacronema, Muller ? Holothuria, sp. 



