164 MESSRS, L. MURBACH AND C. SHEARER ON [June 16, 



7 On Medns^ from the Coast of British Columbia and 

 Alaska. By Louis Murbach and Crbsswbll Shearer, 



[Received April 8, 1903.] 



(Plates XVII.-XXII.*) 

 Introduction. 



The Medusa forming the basis of the present paper were 

 collected by one of the aiithors, during a short trip to the coast ot 

 BritTl oJluinbia, in the summer of 1900, in coxnpa.ay_ with 

 Prof MacBride, of Montreal. They were obtained mostly m the 

 immediate vicinity of Victoria Harbour, Vancouver Island, and 

 the adjoining waters of Puget Sound. The rocky native ^f 

 the coast, shelving off rapidly into deep water, combined with the 

 strong tidal currents of the main portion of Puget Sound which 

 sweep in close to the shore, make this a very favourable point tor 

 the collection of pelagic life. Victoria_ Harbour itself, almost 

 completely land-locked and several miles m length, affords sheitei 

 for many Medusas not found in the more exposed and open waters 



of the Sound. , . n , ■ . 



We are indebted to Prof. Kincaid for kindly placing at our 

 disposal a small but well-preserved collection of Medusae from 

 Alaska and the region of Puget Sound about Port Townsend. 

 The range of our original collection has been considerably 

 extended, and we have obtained valuable material for comparison 

 from different localities. While the number of species obtained 

 is small, we have been fortunate in securing numerous examples 

 of almost all of these. Where only a few individuals of a species 

 have been obtained, doubt has been expressed as to identity. 

 Measurements apply to material preserved in 3 per cent, formalin 

 in sea- water. 



Our best thanks are due to Dr. Newcomb, President ot the 

 Natural History Society of Victoria, B.C., for the facilities he 

 kindly afforded us in collecting and for much general inform- 

 ation regarding the fauna, for which we feel deeply grateful, 

 and to Mr. Adam Sedgwick, of the Morphological Laboratory, 

 Cambridge, for placing the resources of the Laboratory at our 

 disposal. 



The list of species represented in the collection is as follows : — 



CodoniuTYi apiculum, sp. nov.t 

 Syndictyon angidatuon. 

 Dipurena dolichogaster. 



* For explanation of the Plates, see p. 192. 



t This list, with a brief notice of the new species, has been published in the 

 ' Annals and Magazine of Natural History,' ser. 7, vol. ix. (1902). 



