A COLLECTION OF HYDROIDS. 



66\ 



thickened except along the margin, where an internal layer 

 projects and is slightly everted. Diaphragm is separated 

 somewhat widely from the base. 



Length of hydrotheca about 0'251 mm., diameter at mouth 

 0*239 mm., thickness of perisarc 17 fi. Distance of upper 

 edge of diaphragm from base 0'049 mm., diameter of opening 

 in diaphragm 0'036 mm. 



Hydranth. — Tentacles 25-28, muricated. Nematocysts, 

 length about 4j», breadth about 1"7//. 



Text-fig. 19. 



Cam pa nil la ri a c-aliculata Hinchs. X 30. 



Gonosome. — Clonangium ovate, with a short peduncle and a 

 wide convex operculum. Male and female similar in shape. 

 The blastostyle of the female gonangium bears one or two 

 gonophores (text-fig. 19, A). 



Length of gonangium about 0"77 mm., and width 0'53 mm. 



(32) Clytia elongata sp. )t. 



Only one specimen of this hydroid has been found; it 

 occurred clinging to a species of Thyroscyphus di-edged 



