35 



C. Geographical and bathygraphical distribution 

 of specimens previously described. 



a. Geographical distribution. 



Atlantic. Madeira (Bowerbank, Hymeniacidon angulatd). Channel, Lc Portel, Luc, Roscoff 

 (Topsent, Spirastrella mlnax). Mediterranean, Banyuls, Massa de Oro (Topsent, Spira- 

 strclla minax). 



INDIC. Red Sea, Suakin (KELLER, Spirastrella decumbens). Sansibar, LENDENFELD, Vioa florida. 

 Mauritius and Mozambique (RlDLEY, Spirastrella punctulatd). South Africa, Port Elisabeth 

 (Carter, Suberites capensis). Gulf of Manaar, (Dendy, Spirastrella vagabunda var. trinco- 

 maliensis, var. fungoides and var. tubulodigitata). Ceylon (Dendy, Spirastrella vagabunda 

 var. fungoides, var. tubulodigitata and var. gallensis; also B.M. 6). Trincomalee (CARTER, 

 Suberites sp. B. M. 24). Madras (Dendy, Suberites inconstans). King Island, Burmah 

 (CARTER, Suberites trinconialiensis). Christmas Island (KlRKPATRlCK, Spirastrella carnosa). 

 Torres Straits, Thursday Island, West Island (RlDLEY, Spirastrella vagabunda and c on- 

 genera). Sharks Bay (HENTSCHEL, Spirastrella tentorioides and digitata). Koombana Bay 

 (Hentschel, Spirastrella cunctatrix. "Cap 1'Ewin" [= Cape Leeuwin] (Lamouroux '), 

 Alcyoniuui purpureum. 



Pacific. Java Sea (Lindgren, Spirastrella aurivillii). Celebes (Thiele, Spirastrella inconstans). 

 Ternate (KlESCHNiCK, Spirastrella cylindrica). Amboina (TOPSENT, Spirastrella carnosa). 



We learn from this list, compared with the numerous localities in which the Siboga 

 dredged, that Spirastrella purpurea (in the sense I take it) is widely spread, but chiefly occurs 

 in tropical or subtropical regions, and that the Indic and the Malay Archipelago are the places 

 where it a[rows best. 



ö 



b. Depth. 



We possess but little information about the depth in which our sponge was found. 

 Bowerbank says about Hymeniacidon angulata that it lives in low water-, Ridley states that 

 Spirastrella puuclulata occurs between tide-marks. Lamarck speaks of "grande profondeur". 

 Further statements are : 



7 — q(i3)M. (Ridley, Spirastrella vagabunda and congcnera). 



7 — 8 M. (Hentschel, Spirastrella tentorioides and digitata). 



14 — 18 M. (Hentschel, Spirastrella cunctatrix). 



15 M. (Keller, Spirastrella decumbens). 



32 M. (Ridley & Dendy, Spirastrella solidd). 



68 M. (Ridley & Dendy, Spirastrella massa). 



Taking into account the Siboga specimens, we see that the sponge seems to live in 

 comparatively shallow water, the greatest depth being 73 M. 



1) Cf. supra p. 7. 



