Manchester Memoirs, Vol, lix. (191 5 \ No. 1. 13 



tentacle. The spicules of the rachis and stalk resemble 

 those of a typical Actinoptilum molle, but are much less 

 abundantly distributed. 



The rod-like spicules of the rachis are about 0*184 x 

 0095 or 0*386x0*0386 mm. The rod-like spicules of 

 the stalk vary from 0*478 X 0*048 to 0*202x0*027 mm.; 

 the shorter plate-like spicules are o'l 19 X 0*055 to 0*082 x 

 0-036 mm. 



The specimen is very soft, but so far as one can make 

 out without totally injuring the example, the canals are 

 arranged more after the Actinoptilum than the Caver- 

 nularian plan. No axis is present in the colony. 



This form may, from the apparent absence of spicules 

 in the calyces, eventually turn out to be of great syste- 

 matic importance, but it would be incautious to say 

 anything more definite without further examples. 



It may be doubted whether Kiikenthal and Broch's 

 classification of the radial Pennatulaceae as given below is 

 entirely satisfactory. In my opinion some such tabu- 

 lated classifications are without sufficient facts to support 

 them, and are premature. 



1. Without autozooid calyces. 

 Fam. 1. Veretillidae. 



(a) Autozooid spicules branched apically. 

 {an) Stalk spicules plate-shaped — 1. Lituaria. 



(bl?) Stalk spicules rod-like or bone-like — 2. Cavernulina. 



(b) Autozooid spicules not branched. 

 iccc) Spicules plate-shaped. 



(a) Spicules only in stalk, rachis without spicules. Poli- 



cella. 

 (/>) Rachis with spicules — Veretillum. 

 {dd) Spicules oval to rod -like — Cavern ularia. 



