Sponges from the Atlantic Ocean. 465 



expanded by the retraction of the sarcode and elevation of the 

 radiated flesh-spicnles into a conical form. This is well repre- 

 sented in Schmidt's figure 7, J, Taf. iii. (Atlantisch. Spongienf. 

 1870). 



Mj reason for retaining Dr. Gray's generic name of " Macan- 

 dre.wia^'' and rejecting Dr. Bowerbank's subsequent one of 

 '"'' Dactylocalyx^'' can, from what has been above stated, be easily 

 understood. Besides, what student of the Invertebrata would 

 not wish to remember the name of the late Mr. MacAndrew ? 



A single specimen of this sponge was dredged up on board 

 the ' Porcupine,' and, although factured and much more irre- 

 gular in its growth than the type specimen in the British 

 Museum, was, generally (as the fragments are present and can 

 be put together), of the same form, being about A\ inches in 

 diameter across the brim by 3 inches deep, and about -V of an 

 inch thick in the walls. It is in the same jar with the dead 

 fragments of Corallistes Bowerhankii, on which, as before 

 stated, are the numbers " 25, 75, 374 fathoms." Having 

 been taken while living^ its structure is in all respects like 

 that of the type specimen above mentioned. 



There are also two or three other small fragments of this 

 sponge dry and without number, which, having been taken 

 dead and much worn by attrition, only show the characteristic 

 groups of vents J which become exposed, as before stated, when 

 the dermal layer has been worn off. Were I to assign any 

 peculiarity to the form of the filigreed spicule of Macandrewia 

 azorica, 1 should say that the tubercles of the branches had a 

 tendency to assume the form of conical, slightly curved prongs, 

 something like those on the antlers of a stag. 



Good figures of the spicules of this species may be seen in 

 Dr. Bowerbank's illustrations of it (Proc. Zool. Soc. 1869, 

 pi. iv. fig. 5, pi. V. figs. 1-5), together with fig. 6 in pi. xxiii., 

 which, by accident, has been figured as belonging to the 

 hexactinellid sponge '■'■ Iphiteon caUocy allies^ Bk. 1809," = 

 Myliusia callocyathes, ^'^^Ji 1859. No doubt the spicule of 

 Macandrewia azorica, thickly covered by its peculiar flesh- 

 spicule, got by accident into the mounted preparation of 

 Iphiteon caViocyathes^ and thus was drawn as a part of the 

 latter, just as a portion of Macandreioia azorica got by acci- 

 dent into my mounted specimen of Corallistes Boiverhankii as 

 before stated, and led me into a similar error, viz. that of 

 adding to the latter the flesh-spicule of Macandrewia azorica^ 

 an error which I have now corrected. This shows how par- 

 ticular we should be in our mountings, or, at all events, in 

 identifying the spicules which they may contain with those 

 only belonging to the sponge we wish to illustrate. 



