2 3 



XXV. Spirastrella semilunaris. 



1897 Lindgren p. 484. 



1898 Lindgren pp. 323—324, 370, m ; PI. 18, fig. 23a— c, c. 

 1900 (x) Kirkpatrick p. 134. 



Spirastrella semilunaris resembles, according to Lindgren, S. decumbens ■; it differs by 

 the supposed absence of the dermal minute spinispirae. Since I found these spicules in Ridi.i.v's 

 type (B. M. 27) there is not the slightest reason left for erecting a nevv species. 



XXVI. Suberites spiraslrelloides. 



1897 Dendy p. 247 — 248. 



Under this name Dendy described a sponge as "n. sp." from Port Phillip Heads. The 

 author, however, adds: "I have little doubt that this species is identical with Mr. Carter's 

 S. wilsoni, var. albidus, though in the absence both of proper description and specimen of the 



latter it is impossible to be certain The absence of the very remarkable and characteristic 



color of 5. wilsoni appears to be sufficiënt reason for specific distinction in this case". As 

 stated before, I could examine the type-specimen of S. wilsoni var. albidus (B. M. 15)- Careful 

 observations showed me that . traces of the red color are indeed visible. Adding this to the 

 remarks made above I cannot find sufficiënt ground for erecting a "new species" for S. wilsoni 

 var. albidus as Dendy proposed. 



XXVII. Vioa florida. 



1897(5) Lendenfeld pp. 95, 10S — 1 10, 130, 131 ; PI. X, fig. 78 — 105. 



1898 Lendenfeld p. 207. 



There is among the Siboga Spon-ges a specimen (1047) which in external appearance 

 as well as in spiculation so closely resembles T'ioa florida of Lendenfeld, that I do not hesitate 

 and I daresay nobody would, to iclentify both. On the other hand this specimen 1047 is by 

 many transitions in every respect most closely allied to specimens which are decidedly identical 

 with Suberites ineonstans and its varieties. Consequently I consider Vioa florida as identical 

 with Suberites ineonstans. Lendenfeld writes (1. c. p. 1 10) that a characteristic feature of V. florida 

 lies in the shape of the spinispirae, with their peculiar spinae. "Diese Dornen sind zylindrisch, 

 terminal etwas verbreitert und tragen auf ihren Terminalflachen eine Anzahl feinster Dörnchen. 

 Nur mit starken Ül-Immersionen lassen sich letztere erkennen : mit Trockensystemen betrachtet 

 erscheinen die Dornen unregelmassig lappig und haben ein Efflorescenz-artiges Aussehen. Darauf 

 bezieht sich der Speziesname florida". Now I am con vinceel that this is not a specific charac- 

 teristic of florida, for I find exactly such spinispirae in many of my specimens of the Siboga 

 (92a, 92b, 1005, 1045. 931b, 614a etc. etc). Moreover Topsent states (1906^ p. 5 73) that exactly 

 the same peculiarity occurs in Lamarck's type-specimen of Alcyouium purpureum. 



XXVIII. Spirastrella insiguis. 



189S Thiele p. 43. PI. II, fig. 5; PI. VIII, fig. \%a— 18c. 

 1906 (p) Topsent p. 575. 



