202 ROYAL SOCIETY OF CANADA 



the north of Scotland and the Fa^roe Islands (W^-ville Thomson, Carter) : 

 otî^ Bahia. Brazil, and lat. 4G° 16' 8.. long. 48° 21' E., between Marion and 

 Crozet Islands (Challenger). 



Cliona celata, Grant. 

 (Plate III., fig. 3.) 



Cliona crlata. Grant. 182(i. Edin. New Phil. Journ. L, p. 7S ; ii., p. 183, pi. 2, fig. 7. 

 HaUchondria celata, .Johnston. 1842. British Sponges, p. 125 and p. 197. 

 Raphyrus Griffiihsii, Bowerbank. 1864. Mon. Brit. Spong., vol. i., p. 201 ; vol. ii., 



p. 354 ; vol. iii., p. 165, pi. Ixiv., figs. 1-5. 

 Hymeniacidon celata, Bowerbank. 18()6. Mon. Brit. Spong., vol. ii., p. 212, and 



vol. iii., p. 95, pl. xxxviii., figs. 5, 6. 

 Vioa celata. Schmidt. 1870. Grnndz. einer Spong. -Fauna des Atl. Geb., p. 76. 

 Pa]nlli>ia stiberea, Schmidt. 1870. Op. cit., p. 77. 



Grant, in his original deseri])tion. describes two varieties of this 

 species, '• (a) massive and rude (6) sinuous, the shape depending on the 

 form of the holes in old oyster shells which the sponge occupies and fills.'' 

 These two forms were described later b}^ Bowerbank, who retained the 

 specific name celata for Grant's variety (6) and made the other variety 

 the type of his genus Baphyriii< under the name of R. Ciriffithsii. In 

 1875' Carter pointed out that .Raplujnia Cirijfithsii is the free form of 

 Cliona celata. 



In the collection at Ottawa, there are two oyster shells perforated 

 by this sponge, but no Canadian specimens of the free ibrm have been 

 seen by the writer. 



The tylostylote spicules of the Prince Edward Island specimens vary 

 in length from 0-22J to U*r]20 mm. and have an average thickness of 

 0-0049 mm. The spicules are slender, generally slightly curved, graduall}^ 

 and sharph' i)ointed and have the large spherical head, as a rule, sub- 

 terminal. (Plate III., fig. 3). 



Locality. — Prince Edward Island, north shore, two specimens, dr}', 

 in oyster shells. Dr. .lames Fletcher, Ottawa. 1893. 



TETIIACTINKLLIDA. 



TiiENKA MijHicATA, Bowcrbank. 



(Plate III., fig. 4.) 



I'ethca muricata, Bowerl)aiik. M.S. 18.58. Phil. Trans. Roy. Soc, p. 308, pl. xxv., 

 fig. 18. 

 Bowerbank. M.S. 18G4. Mon. Brit. Spong., vol. i., pp. 25, 108, 

 figs. 35, 304, 305. 

 Tisiphonia afjarlci/urmis, Wyville Thompson. 1873. The Depths of the Sea, pp. 74, 



167, fig. 7. 



'Ann. and Mag. Nat. Hist., series 4, vol, xvi., p. 197, and series .5, vol. ix., pp. 

 347, 349. 



