380 A MONOGRAPH OF THE 



not equally prevalent in all parts of the sponge, but where 

 they do occur they appear to abound in tension spicula of 

 both forms, to quite as great an extent as in the dermal 

 membrane. In a letter from Mr. Cooper to the Rev. A. 

 M. Norman, the former gentleman writes, in answer to 

 inquiries regarding the locality of 0. papilla, " I have no 

 hesitation in saying, that I found the specimen at Vazon 

 Bay, after one of the storms which visited this island in the 

 month of February last (18C5). The sponge was un- 

 attached, and associated with other specimens veritably 

 British, in the debris on the shore. As I have not seen 

 another example, I am sorry to confess I can afford no 

 further account of the specimen. I do not possess any 

 foreign sponges." 



Verongia, Bowerbank. 



1. Verongia Zetlandica, Bowerbank. 



Sponge. Massive, sessile, rising in one or more lobular 

 masses. Surface even, minutely hispid. Oscula 

 simple, dispersed, most frequently terminal. Pores 

 inconspicuous. Dermal membrane pellucid. Skele- 

 ton. Fibres stout ; canals irregular and often abnor- 

 mal at the junctions of the secondary with the primary 

 fibres. 



Colour. Dried, light brown. 



Habitat. Shetland, Mr. Bailee and Rev. A. M. Nor- 

 man. 



Examined. In the dried state. 



My first knowledge of this species was from a small and 

 very imperfect specimen dredged at Shetland, by my late 

 friend Mr. Barlee. I received subsequently eight speci- 



