THE FAMILY ASTKOEHIZIDtE 129 



branches. Test generally beset with sponge spicules ; 

 aperture terminal. Becent. 



Example. — H. Tumajiotviczii, Bowerbank, ' Phil. 

 Trans.' 1862, p. 1105, pi. Ixxiii. fig. 3. 



There are two species in the above genus, the 

 example here selected being the better known. It 

 grows adherent to various objects in low- tide pools or 

 between tide-marks to a depth of 20 fathoms, and the 

 tiny whitish tufty tests are often seen clustering on 

 stems of sea-weed. Among other localities it has 

 been found off Hastings, Torbay, Jersey, Colwyn 

 Bay, and Dublin Bay. Eeceuf. (Plate 6, fig. N.) 



K 



