d78 AXTF.ÜON l-'i:i!SlMN'OSA. 



II. All ray-divisions like the 

 first. 



1, Rays ill close contact: 

 the joints flattened la- 

 terally as far as the third 



axillary 18. ScldegeUi. 



2. Rays more or less se- 

 parated. Lower joints 

 not flattened. 



a. 50 cirrhi of 25 une- 

 qual joints . . . 19. Bennetti. Mus. 



h. 25 cirrhi of about 30 Leyd. 



tolerably equal joints. 20. Peronii. 



I. Antedon de Freminville. 1811. 

 1. Antedon. perspinosa , n. sp. 



Description of an individual. 



Centrodorsal discoidal , bearing upon its margin about 

 20 long and slender cirrhi. These are composed of about 

 60 joints, the lowest of which are slightly longer than 

 broad. Each joint in the lower and middle parts of the 

 cirrhus expands towards its distal end so as to overlap the 

 base of the next joint , and its edges are fringed with 

 small spines. This overlap gradually disappears on the 

 ventral side of the later joints , and becomes gradually 

 replaced on the dorsal side by two small spines near the 

 middle of each joint. In the terminal joints these spines 

 become smaller and closer together, and the penultimate 

 one bears a single larger spine in opposition to the ter- 

 minal claw. 



The first radials are partially visible ; the second twice 

 their length , nearly oblong , and quite free laterally : the 

 axillaries pentagonal with a wide distal angle and nearly 

 twice the length of the second radials. The middle line 

 of their apposed edges is marked by a slight spiny tuber- 

 Notes from the Leydeii MuseiiMi, Vol. III. 



