16 INVERTEBRATE ANIMALB. 



Estimated number of species : recent, 7 ; British, ; 



fossil 0. 



IT Specimens of Tuhipora musica, the Organ-pipe 

 coral, and of other species of the genus, from 

 the Indian and Pacitic Oceans and the Ked 

 ^ea. 



Group 47. — Sub-family ALCYONIN^ (Milne Edwards) 

 and allies. Estimated number of species : recent, 

 50 ; British, 3 ; fossil, 0. 



H Examples of Spoggodia, and other genera. 

 Coloured drawings of Alcyonium digitatum, 

 with the polypes expanded, and of other species, 

 chiefly after Dana. 



Group 48.— Class CTENOPHORA. xtsV, a comb; ^spo, 

 I carry. Transparent oceanic Ca'lenterata, resembling in 

 habit some of the smaller Jelly-fish, but much more 

 highly organized. Swimming by means of cilia arranged 

 in vertical comb-like rows. 



If Coloured drawings of Pleurohrachia, &c. Ces- 

 tum Veneris, Bcroe oratus, Escholtzia, &c., 

 from Dr. Anton Dohrn, Naples. 



JFtftlj Cable Case. 

 Sub-kingdom MOLLUSCA. 



Mollis, soft. 



Province MOLLUSCOIDA. Ab-normal MOLLUSCA. 



Class POLYZOA. TroAur, many; ^mv, an 

 animal. Estimated number of species : British, 232 

 (Hincks, 1880); fossil, 1,600; from the Silurian 

 upwards. 



