FAUNA OF LIVERPOOL BAY. 347 



10. — Pseudocuma similis, Gr. 0. Sars. 



Pseudocuma similis, G. O. Sars., Crustacea of Norway, vol. iii. 

 (Cumacea), p 76, pi. 53 (1900). 



It is probable that this Cumacean has been passed over 

 as a deep-water form of Pseudocuma cercaria (Van 

 Beneden), which is occasionally met with in the sandy bays 

 round the Lancashire coast. Professor Gr. 0. Sars, in his 

 work on the Crustacea of Norway, now separates it from 

 that species, and shows its distinguishing characters. One 

 of these is the presence of three small but quite distinct 

 teeth at the anterio-lateral angles of the carapace. 



In the same gathering as the last. Two specimens were 



found. 



Ostracoda." 



11. — Cythere pellucida, Baird. 



Cythere pellucida, Baird, British Entomostraca, p. 173, pi. xxi. 

 fig. 7 (1849). 



This form is very abundant, especially during the 

 summer months on the muddy sand flats along the coast. 



Common on the mud flats near Piel, practically 

 throughout the year. 



12. — Cythere porcellanea, Brady. 



Cythere porcellanea, Brady, Ann. and Mag. Nat. Hist., ser. iv., vol 

 iii., p. 47, pi. vii., figs. 1-4. 



Usually associated with C. pellucida. Some care has to 

 be taken in identifying the two forms owing to the 

 amount of variation that occurs amongst the two species. 



In the same locality as the last. August, 1900. 



13. — Cythere gibbosa, Brady and Robertson. 



Cythere gibbosa, 1$. and R., Ann. and Mag. Nat. Hist., ser. iv. 

 vol. iii., p. 368, pi. xxi., figs. 1-3. 



This ostracod is frequently found in gatherings from 

 the mud flats left dry by the receding tide associated with 

 C. pellucida and C. porcellanea, but is easily dis- 

 tinguished from either of these species. 



In tidal pools near Piel. August, 1900. 



