ZOOLOGY OF FERNANDO NORONHA. 
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13. Chalina P species. — Dark, dirty ; fragments still bearing 
traces of their natural red-purple colour. Extending hori- 
zontally ; throwing up thick ridges ; scattered over with short, 
erect, tubular vents of different lengths. Eibre tough, charged 
abundantly with comparatively large, acerate spicules. Several 
pieces, some accompanied by a portion of Cliondropsis arenifera. 
14. Euspongia (“fine Turkey sponge” of commerce). — 
Typically good, but small specimen ; presenting the charac- 
teristic, crinkled surface. Colour black above, light sponge- 
yellow below. Bearing Polytrema. 
15. Chondrilla nucula, Sdt. — Typically good specimen, 
growing over sand-detritus mixed with Polytrema. 
16. Chondrilla phyllodes, Sdt. — Antilles. Spicules of two 
kinds, viz., pin-like skeletal, and spinispirular flesh-spicule. 
Closely allied in this respect to Spirastrella cunctatrix , Sdt. 
Colour grey or violet. Consistence gelatinous, firm. Three 
typically good specimens growing over sand-detritus mixed with 
Polytrema covered with white Melobesia. 
17. Chondropsis arenifera.— Black on the surface from a 
layer of brown pigmental cells. Growing over a black Stellettci 
(? species), also bearing a cortical layer of dark brown-black 
pigmental cells mixed with small stellates. Zone-spicule trifid. 
Arms simple, straight, extended upwards and outwards. — Eour 
large pieces. 
IS. Chondrilla nucula, Sdt.— Small, but typically good 
specimen. 
19. Synascidia. — Common form. Globular, radiated cal- 
careous spicule. Colour purple-white. Two pieces. 
20. Chalina P species. — Same as No. 13. One piece bearing 
a bit of PLircinia. 
21. Euspongia (“ best Turkey sponge ” of commerce). — Three 
small pieces. 
22. P Alcyonium or Hydroid Zoophyte. — Digitate, reptant ; 
colour yellowish ; consistence soft. 
23. Actinia ? sp. — Now lead-colour. 
