340 Dr. W. C. M'Intosh on the 



Pandalus annulicornis it is abundant in deep water. The 

 common shrimp is seldom captured by man for food. Portumnus 

 variegatus is often the only form visible on the West Sands, 

 and is very plentiful. The rarer forms are Eurynome, Piri- 

 mela, Lithodes, Gebia deltura, Hippolyte spinus, and Dory- 

 phorus Oordoni. 



In contrast with the fauna of St. Andrews, we have in the 

 mild sea of the west of Scotland the fine velvet crabs (Portu- 

 nus puber) amongst the seaweeds between tide-marks. The 

 common lobster is also much more abundant, though the 

 wholesale fishing has of late years told severely on this crusta- 

 cean, even on the most remote shores of the Outer Hebrides — 

 as, for instance, off the rocks of Haskeir near the north-west 

 point of North Uist, where the frequent inroads of the fishermen 

 with their lobster-pots and floats have rendered even the seals 

 less frequent in their accustomed haunts. Xantho, Munida, and 

 the rarer species of Crangon and Hippolyte are also absent from 

 St. Andrews. In the south of Britain, again, are the splendid 

 spiny lobsters off the rocky shores, velvet crabs, Pirimela, and 

 Ebalia under stones between tide-marks, Alpheus ruber and 

 Pagurus cuanensis in littoral pools, Pilumnus in the crevices 

 of the tidal rocks, Pagurus Prideauxii with the beautiful 

 Adamsia adherent to its protecting shell, Mala *, Dromia, and 

 Pohjbius. In the northern waters swarms of the hardy Por- 

 tunus pusillus, P. tuber •culatus, Pagurus pubescens, and Pandalus 

 brevirostris are characteristic, besides the rarer Pagurus tri- 

 carinatuS) Crangon serratus, and Sabincea septemcarinata. 



I am indebted to the Rev. A. M. Norman for kind assist- 

 ance with several species of Palasmonida? and Galatheidte. 



Suborder ST0MAP0DA. 

 Earn. Mysida;. 



Genus Mysis, Latreille. 



Mysis Jlexuosa, O. F. Muller ; Bell, Brit. Crust, p. 336 

 (as M. chamceleon). 



Very abundant in rock -pools. 



Mysis vulgaris, J. V. Thompson ; Bell, op. cit. p. 339. 



Occasionally with the former in rock-pools; much less 

 common. 



* It was recently stated in ' Land and Water ' that Moia squinado had 

 been procured near the Bell Rock ; but, by the kindness of Mr. F. Buck- 

 land, who forwarded the specimen, I am enabled to observe that it was 

 only Lithodes main. 



