REPORT OR THE TETRACTIRELLIDA. 
95 
Supplement containing an Account of Theneida: not in the Challenger Collection. 
Thenea muricata, Bwk. (PL VII. fig. 3). 
i. Tethea muricata, Bwk., MS.; Phil. Trans., p. 308, pi. xxv. fig. 18, 1858. 
ii. „ „ Bwk., MS.; Phil. Trans., pp. 782, 793, 826, pi. xxxi. figs. U, 15, 1862. 
iii. „ „ Bwk., MS.; Brit. Sponges, vol. i. pp. 25, 108, figs. 35, 304, 305, 1864. 
iv. Thenea muricata. Gray, Proc. Zool. Soc. Lond., p. 541, 1867. 
V. Tethea muricata, Bowerbank, Proc. Zool. Soc. Bond., p. 131, 1868. 
vi. Tisiphonia, n. gen., W. Thomson, MS.; Phil. Trans., p. 712, 1869. 
vii. Wyville-Thomsonia Wallichii, E. P. Wright, Quart. Journ. Micr. Sci., vol. x. p. 7, pi. ii., 
January 1870. 
viii. Non Stelletta agariciformis (W . Th.), 0. Schmidt, Spong. Atlant. Gebiet., p. 68, May 1870. 
ix. Dorvillia agariciformis, Kent, Monthly Micr. Journ., p. 293, pi. Ixvi., December 1870 
X. „ „ Kent, Ann. and Mag. Rat. Hist., ser. 4, vol. vii. p. 37, 1871. 
XI. Thenea Wallichii, Traquair, Monthly Micr. Journ., vol. iv. p. 293, 1871. 
xii. „ ,, E. P. Wright, Zool. Rec., 1870 (1872). 
xiii. Tethea muricata, Bwk., Proc. Zool. Soc. Loud., p. 115, pi. v. figs. 1-6, 1872. 
xiv. Tethya agariciformis, Kent, Ann. and Mag. Rat. Hist., ser. 4, vol. x. p. 209, 1872. 
XV. Tisiphonia agariciformis, W. Thomson, The Depths of the Sea, pp. 74, 167, fig. 7, 1873. 
xvi. ? Stelletta echinoicles, 0. Schmidt, Archiv f. mikrosk. Anat., vol. xiv., 1877. 
xvii. Non Halyphysema echinoides, Haeckel, Jenaische Zeitschr., vol. xi. p. 16, pi. ii., 1877. 
xviii. Tethea muricata. Carter, Ann. and Mag. Rat. Hist., ser. 5, vol. ii. p. 174, 1878. 
xix. Wyville-Thomsonia agariciformis, Rorman, Journ. Concb., vol. ii. p. 13, 1879. 
XX. Tisiphonia, Carter, Ann. and Mag. Rat. Hist., ser. 5, vol. vi. p. 140, 1880. 
xxi. Tisiphonia agariciformis, O. Schmidt, Spong. des Meeresbusens v. Mexico, p. 71, 1880. 
xxii. Thenea Wallichii and Thenea muricata, Sollas, Ann. and Mag. Rat. Hist., ser. 5, vol. ix. 
pp. 427-452, pi. xvii., 1882. 
xxiii. Thenea muricata, Vosmaer, Riederland. Archiv f. Zool., Suppl. Bd. i. p. 5, pi. ii. figs. 1-21, 
pi. iv. figs. 114, 115, 1882. 
xxiv. ,, „ and Thenea Wallichii, Carte^ Ann. and Mag. Rat. Hist., ser. 5, vol. xi. 
p. 354-362, 1883. 
xxv. „ ,, and Glavellomorpha minima, n. gen. et sp. ; Hansen, Rorwegian Rorth 
Atlant. Exped., p. 18, pi. v. figs. 2 and 6, and pi. vii. fig. 19, 1885. 
xxvi. ,, ,, Vosmaer, Sponges of the “Willem Barents” Exped., p. 4, 1885. 
xxvii. Thenea Wallichii, Marenzeller, Porifera, &c., from Jan Mayen, p. 6, 1886. 
Characters . — These are fully given in my report on Norwegian sponges (xxii.) ; 
additional details will be found in Yosmaer’s memoirs (xxiii. and xxvi.). The following- 
may be added : — Plesiasters not numerous ; collenchyme, excessively developed, granular 
in the immediate neighbourhood of the flagellated chambers ; flagellated chambers small, 
about 0'035 mm. in diameter. 
Distribution.— Yigien Island, Norway (Bwk.). North Atlantic Ocean; lat. 58° 23' 
N., long. 48° 50' W. ; depth, 1913 fathoms (E. P. Wright). Kors Fjord, Norway, 
depth, 200 to 300 fathoms (Norman). Between Anticosti and Gaspe (Whiteaves). Arctic 
Ocean, from lat. 71° 52' N., long. 19° 47' E., to lat. 72° 36' N., long. 25° 58' E., depth, 
87 to 185 fathoms (Vosmaer). North Sea and Arctic Ocean; lat. 61° 15' N., long. 
