1904.] SPONGES OP THE GENUS LEIJCOSOLENIA. 361 



Ascortis seu Ascandra fabricii Haeckel, 1872, I.e. p. 71, pi. 11. 

 fig. 3, pi. 12. figg. 3 ci-3 i. 



Ascandra complicata Haeckel, 1872, I. c. p. 93, pi. 15. figg. 1 a- 

 Ik. 



Ascandra pinus Haeckel, 1872, I.e. p. 105, pi. 16. figg. 3a-3i 

 and pi. 19. 



'^Ascandra contorta Barrois, 1876, Embryoi. d. q. Eponges d. 1. 

 Manche, Ann. Sci. Nat. (6) iii. p. 36. 



Ascandra comiplicata Bowerbank and Norman, 1882, Mon. Brit. 

 Spong. iv. p. 226. 



Ascandra complicata ^vintedt, 1887, ' Vega' Exped., Yetenskapl. 

 lakttagelser, iv. p. 406. 



Leiicosolenia pi7ius Topsent, 1891, Arch. Zool. Exp. (2) ix. 

 p. 525. 



LeuGOsolenia complicata Levinsen, 1893, Vid. Ud. Kanonbaaden 

 ' Hauchs ' Togter, v. p. 424. 



Leucosolenia complicata Weltner, 1894, "Wissensch. Meeresun- 

 tersuch. n. F. i. p. 325. 



Leucosolenia complicata Minchin, 1896, Ann. Mag. Xat. Hist. 

 (6) xviii. p. 359. 



Leiiicosolenia complicata Bidder, 1898, P. R. Soc. Ixiv. p. 69. 



Ascandra com^plicata Breitfuss, 1898, Arch. Natiirges. Ixiii. i. 

 p. 213. 



Ascandra contorta Breitfuss, 1898, I.e. p. 214. 



Ascandra fahricii Breitfuss, 1898, I.e. p. 214. 



Ascandra fabricii Breitfuss, 1898, Mem.. Acad. St. Petersbourg, 

 (8) vi. p. 7. 



Ascandra contorta Breitfuss, 1898, 1. c. p. 15, pi. i. fig. 1. 



Ascandra fabriGii~Bvexth\^s, 1898, Arch. Naturges. Ixiv. i. p. 285. 



Ascandra contorta Breitfuss, 1898, 1. c. p. 285. 

 " Ascandra complicata Breitfuss, 1898, I.e. p. 285. 



Ascandra fabricii Breitfuss, 1898, Ann. Mus. Zool. Acad. St. 

 Petersbourg, p. 17. 



Ascandra complicata Breitfuss, 1898, I. c. p. 27. 



Ascandra contorta Breitfuss, 1898, 1. c. p. 27c 



Leucosoletiia complicata Minchin, 1900, in Lankester's Treatise 

 on Zoology, ii. Sponges, p. 5, fig. 5. 



Ascandra complicata Arnesen, 1901, Bergens Mus. Aarborg, 

 1900, no. 5, p. 13. 



Ascandra armata Arnesen, 1901, 1. c. p. 13. 



Leucosolenia complicata Rousseau, 1903, Mem. Soc. Malac. 

 Belgique, xxxvii. p. 7, fig. 3. 



Leucosolenia fabricii Rousseau, 1903, I.e. p. 6, fig. 2. 



Leiicosolenia complicata Allen, 1904, J. Mar. Biol. Assoc, n. s. 

 vii. p. 185. 



I commence with this species as being the most easily identified 

 of the three British Leucosolenias, although, cuiiously enough, it 

 is more often found incorrectly detei-mined than either of the 

 others. While the systematists previous to Haeckel for the most 

 part considered it a synonym of botryoides, recent authors have 



