10 INVERTEBRATE ANIMALS. 



Even more delicately beautiful is the paper-like 



coral, Mycedium fragile. Note a fine specimen 



brought home in the " Argo" from the island of 



Grenada, West Indies. 



Group 27. - Genus LOPHOSERIS (Milne Edwards) and 



allies. kod^oc, a crest ; cepjj, a plant. Lamarck's 



name for this genus, Pavonia, alludes to the expanded 



disc of the coral, with polype-mouths in place of the 



eye-spots of the Peacock's tail. Estimated number of 



species : recent, 24 ; British, ; fossil, 42. 



IF Examples from the Indian and Pacific Oceans. 



Upper Compartment. 



L. prcBtorta, curiously intricate in its growth. 



Group 28. — Genus FUNGIA (Lamarck) and allies. 

 Estimated number of species : recent, 32 ; British, ; 

 fossil, 9 ; chiefly Mesozoic. 



% Specimens of Fungia, shewing the attachment of 

 the young corals to the under -side of the 

 - parent coral, which is itself free and un- 

 attached. 

 Specimens of Herpetolitha, the Slug-coral; and of 

 Polyphyllia, the Mole-coral. Cycloseris. 

 Ujiper Compartment. 

 Genus Halomitra, Dana ; the corallum is deeply 

 cup-shaped, and shews, within, the truncated 

 frustrum of a former corallum, on which the 

 present specimen seems to have been developed. 

 The same peculiarity has been observed by the 

 writer in other specimens of Halomitra. 



Group 29.— Genus MERULINA (Ehrenberg). f^tyjpuw, to 

 wind, in allusion to the corded appearance of the sur- 

 face. The coralla take the form of leaves spread out 



