AND STAR-FISH. 



173 



the aid of the microscope, Mr. Kitton examined their 

 position, in an arm with the spines and plates in 

 situ, and found them attached to the lower margin 

 of the side ray-plate, near the base of the last spine, 

 as shown in Fig. 92. These claws have a cellular 



Fig. 92. 



Portion of one of the rays of Ophiocoma rosula, showing the " claws " 

 or " hooks " in situ, x 25. 



burr on their lower portion, the remainder being 

 smooth and glassy. The inner margin of each claw 

 has a spur curving downwards, and Mr. Kitton was 

 of opinion that they were useful in locomotion. 

 Another species of "Brittle-star" is that which 

 Professor Edward Forbes has named Ophiocoma 



