152 THE ROYAL SOCIETY OF CANADA 



surfaces between finely punctate or more or less curved and divergent 

 lines) , made by broad vacant spaces, arranged much as in some forms 

 of Stauroneis, while the dots in the intervening areas are much larger, 

 coarser and without definite arrangement. The diff^erences seem 

 sufficient to justify its being regarded as a new species. 



EUCAMPIA EHR. 



This interesting genus which is neritic on the west coasts of Nor- 

 way is thus characterized by Gran: 



Cells bound in chains, valves in outline elliptical, with two blunt 

 polar processes but without bristles. Chains curved spirally (axis 

 of spiral parallel with the trans-apical axis) with large spaces between 

 the cells. Chroma tophores numerous, small. 



A. Chains broad, cells shorter or as long as the breadth of the 

 chain. 



1. E. zodiacus Ehr. 



B. Chains small, cells many times longer than the breadth of 

 the chain. 



2. E. groenlandica Gran. 



The species found in the Vancouver waters is E. zodiacus Ehr. 

 It does not appear to be abundant or generally distributed, but a 

 chain of seven cells, besides several smaller ones, was observed in a 

 gathering from north of Brandon Island (22 June, 1912). The breadth 

 of the chain was 27-73 microns. 



ETHMODISCUS. 



A form closely resembling Ethmodiscus punctigera Castracane 

 occurs in one of the Vancouver gatherings from Porpoise Bay, B.C. 

 It resembles Coscinodiscus concinnus, and like the latter is of excep- 

 tionally large size, and with very fine radiating punctate striae which 

 scarcely reach the centre, but it is lacking in the sub-marginal corona 

 of distinct points which is a feature of Castracane's species. (See 

 Challenger Report V. 16.) 



GRAMMATOPHORA. 



Grammatophoras are very abundant in some of the gatherings 

 from Vancouver. Besides the common and widely distributed 

 Gr. marina and Gr. Serpentina, they include the large Gr. maxima, 

 the distinctive angulosa, oceanica with its varieties, Japonica, and a 

 variety, possibly of angulosa, provisionally noted by Dr. MacKay. 



