30 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



spherical. Girdle and transverse flagellum completely encircling 

 the body, the distal end very slightly displaced posteriorly. 

 Sulcus extending from about half way between the apex and 

 the girdle to the antapex, the left border overlapping the right. 

 Longitudinal flagellum projecting about the length of the body 

 beyond the antapex. 



Nucleus placed centrally within the epicone. Cytoplasm 

 filled with small refractive granules and with a longitudinally 

 streaked appearance. Colour yellowish brown. Length 

 about 150yu. 



Polykrihos schwartzi, Biitschli. Of frequent occurrence 

 on almost all parts of the beach, but especially at the south end. 

 During the late summer of 1921 it was very constantly present 

 off the end of the little pier, feeding on Amphidinium kofoidi, 

 and again at a higher level opposite Dandy Hill feeding on a small 

 but very abundant Chlamydomonadinid. (See Sketch Map 2). 



Noctiluca scintillans, Macartney = N. miliaris, Suriray. 



On July 23rd, 1921, over a considerable area of the beach 

 off the end of the little pier, the ripple marks were filled with 

 pink gelatinous masses of N. scintillans. These were in a very 

 healthy and active state, showing all stages in division. For 

 some time previously this species had been plentiful though 

 not unusually abundant in the plankton from Port Erin bay. 



