115 



PLATE XLVI. 



HalichojSTdria Patteb,soni, JBoiverbank. 



Vol. ii, p. 265, ' Mon. Brit. SpongiadiO.' 



Fig. 1. — The largest specimen of tlie species that I 

 have seen. It is in the cabinet of the Rev. A. M. 

 Norman ; it was labelled from the Minch, 1866. 

 Natural size. 



Fig. 2. — Represents three small specimens of H. 

 Pattersoni parasitical on a small stem of a zoophyte, 

 for which I am indebted to the Rev. A. M. Norman, 

 who obtained it at the Minch in 1866. Natm-al size. 



Fig. 3. — One of the incipiently spined, tension 

 spicnla, from the dermal membrane. X 250 linear. 



Fig. 4. — An acuate, entirely spined, skeleton spi- 

 ciilum. X 250 linear. 



Fig. 5. — A dentato-palmate, ineqni-anchorate, reten- 

 tive spiculum. X 530 linear. 



Fig. 6. — A bidentate ineqni-anchorate spiculum, 

 from the interstitial memljranes of the sponge, re])re- 

 sented by fig. 1. I did not obtain any of this iovra in 

 the type-specimen. It was not in nearly so fine a state 

 of preservation as the specimens obtained by Mr. 

 Norman at the Minch. X 530 linear. 



Halichondeia Hyndmani, Boiccrban/,-. 



Vol. ii, p. 264, ' Mon. Brit. Spongiadas.' 



Fig. 7. — Represents a fine specimen of the species 

 on a shell of Pecten opercularis, from the Diamond 

 Ground, off Hastings, {a a) the sponge, {b) a patch of 

 Cellepora pumicosa. Natural size. 



Fig. 8. — Represents a fine detached mass of H. 

 Plyndmani from the Diamond Ground. It is in a fine 

 state of preservation, and exhibits the surface charac- 



