INVERTEBRATE ANIMALS. 13 



The Mark 5[ indicates specimens or other illustrations exhibited in the Gases. 



Group 37.— Sub-order ZOANTHAEIA-SCLEBOBASICA. 

 o-xXYipog, hard ; jSoKm, a pedestal = ANTIPATHARIA 

 (Milne Edwards). avT»7ra5>}j, of opposite properties. 

 The horny axis of the coral is thickly beset with short 

 spines, and is covered by the common tissue uniting the 

 polypes. Estimated number of species : recent, 24 ; 

 British 0; fossil, 1. 



IT Specimens of Antipathes and Cirrhipathes, the 

 former shrub-like and delicately branched ; the 

 latter with a simple stem growing in a loose 

 coil. The species are widely distributed, 

 growing on rocks in deep water. 

 upper Compartment. 

 Antipathes arborea, the black coral of commerce; 

 rough, and manufactured into beads. 



Group 38.— Sub-order ZOANTHAEIA - MALACODER- 

 MATA. jaaAaxoj, soft; Ss'pjaa, the skin = AC TIN ARIA 

 (Milne Edwards), axriv, a ray. Distinguished by 

 the absence of a solid corallum. Estimated number of 

 species : recent, 200 ; British ; fossil, 0. 



H Models in coloured glass of about 30 species of 

 British Sea Anemonies. 



Order ALCYONARIA. aAxuciv, the Halcyon of the ancients. 



In this order the polypes have eight fringed tentacles. 



Group 39.— Family PENNATULID^. Pejina, a feather. 

 The quill of the Sea-Pen during the life of the animal 

 remains plunged into the mud at the bottom of the sea, 

 but does not contract any adherence. Estimated 

 number of species : recent, 26 ; British, 3 ; fossil, 1. 

 H Examples of Pennatula,' Virgularia, Pavonaria, 



Renilla, &c. 



Upper Compartment. 



Quill of a gigantic Sea-Pen, from British Columbia. 



