13 



sponge than those we took for microscopical examination, although this is not probable. Thèy 

 have the shape as described by Sollas for P. intermedia; "a spherical centrum covered 

 with smal] tent-like spines". Spherasters occur as well in the parenchyma as in the cortex; in 

 the latter case they generally occupy a peripheral place. 



2. P lacospongia melobesioides Gray. PI. I, fig. 5 — 9; PI. II, figs. 1 — 4, 6; PI. III; PI. IV, 



fig- 1 — 8; PI. V, figs. 2 — 4, 6, 10, 12. 



Running numbers: 660 a, 660 b, 660 c, IO33, x ^>Mi *849 a > i&l-O. b, 1851, 1853. 



Synonymy and literature. 



Placospongia melobesioides. 



1867 (j3) Gray p. 127 — 129, with woodcut. 



1867 Gray p. 549. 



1868 Gray p. 168. 



1869 Wright p. 322. 



1870 Schmidt p. 72; PI. VI, fig. 15 — 17. 

 1875 Carter p. 198. 



'879 {7) Carter p. 148 — 149. 



1879 (x) Carter p. 356. 



1880 Carter p. 53 — 55. 

 1880 Schmidt p. 75. 

 1880 Sollas pp. 241, 245. 

 18S1 (x) Carter p. 384. 



1882 Carter p. 357—358; PL XII, fig. 33. 



1886 Buccich p. 222. 



1SS8 Sollas pp. CXLIIL CL, 271, 273. 



1889 (x) Dendy p. 20. 



1891 («) Keiler p. 324 — 326; PI. XVIII, fig. 29 — 31. 



1893 ((3) Topsent p. 177. 



1896 Kieschnick p. 534. 



1897 Lendenfeld pp. 52 — 54, 152, 155, 159, 161, 169, 187 — 190, 229, 232. PI. VI, fig. 47; 



PI. VII, fig. 66. 

 1897 Lindgren p. 485. 



1897 Topsent pp. 424, 433. 



1898 Lendenfeld p. 207. 



1898 Lindgren pp. 326—327, 361, 365 — 368. PI. 18, figs. 21, 22, 27. 



1898 Topsent p. 123. 



1899 Thiele pp. 5, 9, 18. PI. III, fig. 6a. 



1900 Kieschnick pp. 574, 577; PI. XLIV, fig. 2. 

 1900 Thiele pp. 56, 72. 



[According to Wright (1869 p. 322) Acamas violacea Duch. & Mich. is closely allied to Placo- 

 spangia melobesioides; it seems to us that neither in the description, nor in the illustration in DUCHASSAING 

 & MlCHELOTTl's paper (1864), can any argument be found in favour of Wright's view.] 



Locality and Depth. 



Stat. 43. 7°i2'.6S., 118 f.j E. Up to t,6 M. |66o a, 660 b, 660 c]. 



Stat. 164. i° 4 2'.5S., i30°47'.5E. 32 M. [1847, 1849 a, 1849 b, 1851, 1853]. 



Stat. 240. 4 12' S., 129° 20.4 E. 9—45 M. |l033]- 



. 



