PLATE XIII. 



Halypiiysema TuMANOwiczii, Bov-crbanJc. 



Vol. ii, p. 76, ' Mon. Brit. SpongiadEe.' 



A flue specimen of this sponge based on a portion of 

 tte stem of a zoophyte, X 175 linear, is represented 

 by fig. 359, plate xxx, vol. ii, ' Mon. Brit. Spongiadaj.' 



Halyphysema eamulosa, BowerhanJc. 



Vol. ii, p. 79, ' Mon. Brit. SpongiadEe.' 



Eig. 1. — Represents a portion of the only specimen 

 that has yet been fonnd, and which is in the cabinet of 

 the Rev. A. M. Norman. The sponge fignredis from a 

 preparation in Canada balsam. X 36 linear. 



Ciogalypta penicillcjs, Bowerbanh. 



Vol. ii, p. 81, ' Mon. Brit. Spongiadee.' 



Fig. 2. — Represents the second fine specimen of 

 this sponge that I obtained from the Diamond Traw- 

 ling Ground, off Hastings. It is described in p. 82 of 

 the volume quoted above. The external characters of 

 the specimen are in a finer state of preservation than 

 those of the one first described in p. 81. 



Figs. 3, 4. — Represent two of the skeleton spicula. 

 X 80 linear. 



The spicula are all of the same form, but they vary 

 in diameter from exceedingly slender to rather stout. 



Fig. 360, plate xxx, vol. ii, represents a longitudinal 

 section through the central axis of one of the elongate 



