PORIFERA. III. 



Spicules : 

 skeletal. dermal. microsclera. shape. 



1876. G.pyrula Cart. (Ann. Mag. Nat. Hist. 

 4, XVIII, 388, PI. XIV, fig. 20, PI. XV, 

 fig. 38) (Cometella) tornota styli chelae arcuatae club-shaped. 



1882. armigcraBovf. 1 ) (Mon. Brit. Spong. 

 IV, 73, PI. IV, figs. 10 17) Hymenia- 

 cidon) oxea styli chelse arcuatae crust 



1885. dura Ann. Hans. (Norw. North. Atl. 



Exp. XIII, 13, PI. II, fig. ^(Sclerilla) oxea oxea chelse arcuatae club-shaped. 



arctica Arm. Hans. (ibid. 12, PI. II, 



fig. 4, PI. VI, fig. 15 (Sclcrilla) . . . oxea oxea chelae arcuatae club-shaped. 



membranacea Arm. Hans. 2 (ibid. 4, 



PI. I, fig. 1 1, PI. VI, fig. 1 2.) (Renter a) ? oxea 



1892. peduncutalaTo^s. (Resultats des 

 camp.sc.du Prince de Monaco, II, 105, 

 Pl.V, fig. 6, Pl.X, fig. 17.) (Yvesia). . tornota styli chelae arcuatae club-shaped. 



fallax Tops.(ibid., 106, PI. VI, fig. 13, 



PI. X, fig. 14.) (Yvesia) tornota styli chelae arcuatae massive. 



- Hanseni Tops, (ibid., 106, PI. VI, 



fig. 9 a, PI. X, fig. 13) (Yvesia) tylota styli chelae arcuatae, crust. 



sigmata 

 - Richardi Tops, (ibid., 107, PI. X, 



fig. 15.) (Yvesia) tylota styli chelae arcuatae, crust 



sigmata 

 - Guernei Tops, (ibid., 105, PL III, 



fig. 7, PI. X, fig. 16) (Yvesia) styli styli sigmata thick crust. 



- RtdleyiTo^s. (ibid., 107, PI. X, fig. 



12) ( Yvesia) tylota with spi- tornostrongyla -f- crust. 



nulous ends 



- pertusaTops. (ibid., 107, PI. IV, fig. 

 10, PI. X, fig. 18.) (Yvesia) (non per- 

 iusa Tops. 1904) tornota oxea chelae arcuatae crust. 



- linguifera Tops, (ibid., 108, PL X, 



figs. 10 n) (Yvesia) stroiigyla oxea chelae arcuatae massive crust. 



rosacea Tops. (Arch. Zool. exp. et 



gen. 2, X, XXIII) (Yvesia) tornota styli chelae arcuatae thick crust 



1898. alecto Tops. (Mem. de la Soc. Zool. 



de Fr. XI 248, fig. 2 e e") ( Yvesia) . strongyla oxea, with large -f- massive. 



spinulous spines 

 and transform- 

 ations to asters 



1903. polymastmThiele (Arch, fur Natur- 

 gesch. 1903, 391, Taf. XXI, Fig. 

 24 a c) strongyla styli chelae arcuatae semiglobular. 



mammillata Arnesen (Berg. Mus. 

 Aarb. 1903, 17, Taf. II, Fig. 6, Taf. VII, 



Fig. 2.) (Yvesia) tylota, styli to chelae arcuatae massive. 



single styli strongyla 



') Perhaps a Crella. 2 ) This species might perhaps be a Crella, but the point cannot be decided, only the dermal mem- 

 brane being known. 



