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



Pandalus annidicornis it is abundant in deep water. The 

 common shrimp is seldom captm-ed 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- 

 melay Lithodes^ Gebia deltura^ Hijjpolyte 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- 

 mis 2nd}er) 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 thefrequent inroads of the fishermen 

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

 less frequent in their accustomed haunts. Xanthoj Munida^ and 

 the rarer species of Crangon and Hij^polyte 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, Pihimnus in the crevices 

 of the tidal rocks, Pagurus Prideauxii with the beautiful 

 Adamsia adherent to its protecting shell, Maia *, Dromia^ and 

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

 tunus pusiUus, P. tuherculatuSj Pagurus jJuhescenSj Siud Pandalus 

 hrevirostris are characteristic, besides the rarer Pagurus tri- 

 caritiatus, Grayigon serratus^ and Sahmcea septemcarinata. 



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

 ance with several species of Palasmonidte and Galatheidse. 



Suborder STOMAPODA. 



Fam. Mysidae. 

 Genus Mysis, Latreille. 



3fysis Jlexuosa, O. F. Miiller ; Bell, Brit. Crust, p. 336 

 (as 31. 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 



* It was recently stated in ' Laud and Water ' that Maia squinado had 

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

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

 only Lithodes maia. 



