and Acapulco Sponges. 365 



Thus we are led to the conclusion that in the selection of 

 material from foreign sources by the HircinkB^ and in the 

 supplying of it from itself by the Oeodice^ the sponge evinces 

 the power not only of selection, but of transporting from 

 place to place with definite arrangement what it requires, 

 together with the power oi producing this material itself when 

 it cannot obtain it from other sources. 



Addendum. 



Insert immediately after " Family 2. Cavochalinida," 

 p. 277, antecij the following : — 



Patuloscula procumbenSy n. sp. 



Cauliform, rhizomatous, procumbent, solid, throwing up 

 thumb-like hollow processes, or simply branched, with large 

 patulous vents ; processes short, erect, annularly inflated, in- 

 creasing in size upwards, and somewhat contracted at the 

 orifice, which is large and circular. Texture resilient. Colour 

 pale amber or deep dark amber, bordering on purple, which is 

 probably the real colour when fresh. Surface smooth, even. 

 Composition fibrous, resilient. Spicule of one form only, 

 viz. acerate, smooth, curved, fusiform, sharp-pointed, 20 by 

 li-GOOOths inch in its greatest dimensions, small, and scanty. 

 Size of specimen 5| inches high by l^'xl inches square. 



Jiab. Marine. 



Loc. West Indies, Grenada. 



Ohs. The light amber colour which gives this specimen 

 such a beautiful appearance seems to have been produced by 

 cleansing with acids, since some specimens of the same species 

 in the British Museum still retain a trace of the '' purple 

 colour" common to this kind of Chalinoi. Besides a similar 

 specimen to that in the Liverpool Free Museum, which was 

 presented to the British Museum by Mr. T. H. Higgin, 

 F.L.S. (reg. no. 77. 3. 9. 3) there are others in the latter, viz. 

 no. 140, registered 45. 5. 12-20 and -21, and no. 264, regis- 

 tered 45. 5. 12-13, -15 and -16. It is some time since I gave 

 the above name to this species, which will illustrate the group 

 "Tubulodigitata " in my classification ; and at the suggestion 

 of !Mr. T. H. Higgin, F.L.S. , I now add the description. 



To the above may also be added two very fine specimens of 

 'the same family from Grenada, and in the 'Argo' collection, 

 viz. Tuba ^jlicifera, de F. et M. p. 53, pi. x. fig. 2, and Tuba 

 [CaUisjwngia) Eschrichtii, de F. et M. p. 56, pi. xii. fig. 1. 

 The former illustrates group 8, viz. " Ciliata," in my Classi- 

 fication ; and as the latter (which is more or less covered 



