372 Prof. Hickson, On Alcyonaria in the Cambridge Museum 



Cavernularia darwinii n.sp. 

 In the stores of the Cambridge Zoological Museum there is a 

 specimen of the genus Cavernularia from C. Dai-win's "Beade" 

 collection labelled Chatham Island, Galapagos Islands, September 

 iSSo As I can find no record of any species of this genus in the 

 Eastern Pacific Ocean and as this specimen is of special interest 

 from Its association with the great English naturahst and his 

 memorable voyage m the "Beagle" I decided to examine it carefully 

 with a view to gmng it a definite specific name 

 cf J f specimen is unfortunately not very well preserved and is 

 strongly contracted and bent, but there are three autozooids killed 

 expanded, one of which has been mounted as a preparation for 

 the microscope. ^ 



Spicules of Cavernularia darwinii. [ x 200.] 



90n1^'Tn WwV'"''t'*^r""^ ^^"^^ '^' «P^^"^^^^^ i« -bout 

 iJlLr'i ?f ' fV^""^}^ being 38 mm. and the stalk 12 mm 

 and therefore the stalk-rachis ratio about 1-3 



thell^VnV.7ri^^" '" T^' "7 "'^^^^^^ statement about 



immber of.^to* . ' T"^l '^ ^'^' '^'^'' ^' «f the relative 

 number of autozooids and siphonozooids owing to the extremelv 



sti^s of Ic^n ^"\^,\^^-de without having recourse to a large 

 aut'Loids." " *'"' ^P^^^^"*^^ ^^^^^ -^ -l-*i-ly -ry few 



and^s";)' faT'afca'n Z"""", ''." I' ^T^ ^^ ^^^^"^g ^'^ ^ -«dle 

 half wL nn .>, I ^""^P^ ^y *bis method it extends about 



half-way up the rachis and about half-way down the stalk. The- 



