ZOOLOGY OP FERNANDO NOEONHA. 5(J5 



13. Chalina ? species. — Dark, dirty ; fragments still bearing 

 traces of tlieir natural red-purple colour. Extending hori- 

 zontally ; throwing up thick ridges ; scattered over with short, 

 erect, tubular vents of different lengths. Fibre tough, charged 

 abundantly witli comparatively large, acerate spicules. Several 

 pieces, some accompanied by a portion of Cliondro;psis 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. Grrowing over a black Stelletta 

 (? 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. 



18. Chondrilla nucula, Sdt. — Small, but typically good 

 specimen. 



19. Synascidia. — Common form. Globular, radiated cal- 

 careous spicule. Colour purple-white. Two pieces. 



20. Chalina ? species. — Same as No. 13. One j)iece bearing 

 a bit of Hircinia. 



21. EusPONGiA (" best Turkey sponge " of commerce). — Three 

 small pieces. 



22. ? Alcyonium or Hydhoid Zoophyte. — Digitate, reptant ; 

 colour yellowish ; consistence soft. 



23. Actinia ? sp. — Now lead-colour. 



