160 CLASS III.— ORDER I. 



tuse and rather flattened; the longitudinal fibres 

 stronger than the transversal or diverging ones. 



Var. B. Protuberant, and nearly oval. 



Australasian seas. 



MYROBALAN. 



38. Spongia myrobolanus. Small, pediculated, 

 and of an oval form, slightly compressed, more or 

 less oblique ; texture fine and closely compacted. 



LION'S FOOT. 



39. Spongia pes-leonis, A very short pedicle, 

 supporting an oval or round compressed mass^ 

 of a soft and porous texture ; the upper border oscu- 

 lated. 



Southern seas. 



GOOSE-FOOT. 



40. Spongia anafipes. Wholly fibrous, greyish 

 and transparent ; longitudinal fibres stronger than the 

 transversal, forming an imperfect net-work with long 

 meshes ; pedicule hard and porous. 



Southern seas. 



RED. 



41. Spongia rubra. Simple, tough, nearly round 

 or compressed, osculated, and porous ; tubercles pro- 

 jecting. 



Red Sea, near Suez. 



FLAT. 



42. Spongia plana. Extended, crustaceous, and 

 fan-shaped. 



Sea of Norway. 



