Clark — New Crinoids from. Tasmania and New Zealand. 43 



third from one-quarter to one-third again as broad as long, the fourth 

 about half again as long as broad, the fifth about twice as long as broad, 

 and the sixth nearly as long; the following rapidly decrease in length so 

 that t lie last seven are broader than long ; these are somewhat compressed 

 laterally and therefore broader in lateral view than the preceding ; from the 

 fourth onward the distal dorsal border is thickened, this thickening be- 

 coming gradually narrower and more prominent in the central portion so 

 that on the last two or three before the penultimate it resolves itself into 

 a low sharp subterminal tubercle; the opposing spine has a transversely 

 broadened chisel like edge. 



There are 20 arms, in the specimen at hand all broken off at the base. 

 The distal edges of the ossicles of the division series and of the brachials 

 are very slightly prominent, and are bordered with very fine spines. 



Habitat. — Three Kings Island, New Zealand. Dredged on hard bottom 

 in Go fathoms by Dr. Th. Mortensen, January 5, 1915. 



Remark*. — This species differs from C. lasmaniae, to which it appears to 

 be most closely related, in having fewer arms, in the lesser length of the 

 earlier elongated cirrus segments, and in the swollen distal borders of the 

 earlier cirrus segments, the distal border of the first seven cirrus segments 

 in C. lasmaniae being quite unmodified. 



It is easily distinguished from C. benhami, from Preservation Inlet, 

 New Zealand, by the few r er arms, the much shorter cirri, and the fewer 

 cirrus segments. 



As w r e know them at the present time the status of the forms related to 

 C. trichoptera is very uncertain. Much more material, especially from 

 Tasmania and New Zealand, is needed to clear up the situation. 



