FAUNA OF THE ISLES OF SCILLY. 123 



ECHINODERMA. 



Larval star/es. Larval stages belouging to tlie Ophiurid group 

 occurred iu slioals. Ophiothrix fragilis was es2)ecially 

 abiiudant. 

 A single specimen of Bipinnaria asterigcra was taken. 

 Echinopluteus of JEchimcardium was common. 



POLYOHAETA. 

 Larval stages. A few very early stages of Chaetoptcrus were seen 



and a few fine trocliosplieres of Polygordius. 

 Tomopteris onisciformis. Early stages about 5 mm. in length were 



abundant. A few taken up to 10 mm. in length. 

 Aiitolytus. sp. l' Few specimens. 



CHAETOGNATHA 

 Sagitta b/pniictata. Abimdant. 



CEUSTACEA. 



The Copepods were not identified, but were plentifvd enough 

 in the net. 



The larval stages of the Decapod Crustacea were abundant, 

 especially the Zoaeai of PorcelUma and Cancer. 



A tine specimen of the larval stage known as Phyllosoma 

 was taken. 



Podon intermedius and Evadne nordmanni^ both carrying 

 embryos, were present in shoals, forming one of the characteristic 

 features of the plankton. 



PHOEONIDEA. 

 Actinotrocha. A few specimens taken on July 22nd. 



ENTEEOPNEUSTA. 

 Balanoghssus. Tornaria larvae common. A nice series was 



obtained. To judge from the earliness of some of the stages, 



it is most probable that Balanoghssus lives between the 



islands. 



TUNTCATA. 



Oikopleura fabeUuin Sp. ? Very scarce. 



CEPHALOCHOEDA. 

 Amphioxus. Solitary specimens belonging to a late larval stage 

 were taken on July 21st and 22nd. 



