MAEINE INVERTEBRATE FAUNA OF PLYMOUTH. 339 



Norman off the south-west coast of Ireland in the following year, 

 since which date it appears not to have been observed upon our coasts. 

 Our museum already contains a considerable collection of Deca- 

 poda, named by Prof. Weldon and Dr. Norman, which is all but 

 representative of the fauna. The year's additions to this type 

 collection consist of the species Xantho floridus, rivulosus, and tuher- 

 culatus, Hyas araneus, Achseus Cranchii (a valuable addition made 

 by my assistant, Mr. Walker, in the spring), and Ewpagurus 

 Forhesii, which was added by Mr. Riches. The reserve stores of 

 other interesting forms, e. g. Portunus arcuatus, Polybius Henslowii, 

 Ehalia, Diogenes varians, Crangon Allmanni, have been considerably 

 increased. 



