PHYTO-PLANKTON OF BAY OF FUNDY 107 
| SESSIONAL PAPER No. 38a 
Robbinstown May 23; Biological Station May 21, very abundantly. It was found at 
Eastport in July, and in L’Etang harbour August 10; but was wanting in collections 
later than August both in Passamaquoddy bay and the Bay of Fundy. It would seem 
to attain its maximum in April and May. 
Thalassionema.—Forms believed to be referable to this genius have been found 
in several gatherings made by the “ Prince” in Passamaquoddy bay. Some of these, 
collected in October, being composed of little else. The frustules bear considerable 
resemblance to those of Synedra, and again to some varieties of Rhizosolenia, but differ 
greatly from both. The most remarkable feature, the specimens referred to is their 
enormous length, running from 300 to 800'mu, with a zonal breadth from 34 to 8 mu. 
The sculpture along the edge is a very minute row of points, perhaps running about 
20 in 10 mu. The cells show variations in diameter, and are often curved or flexuose, 
but do: not taper at the ends or bear bristles, as in Rhizosolenia.. Perugallo following 
Van Heurck places the genus Thalassionema between Synedra and Thalassiothrix. 
Dr. McKay is disposed to regard the form here described as new. It may be a variety 
of Thalassiothrix nitschioides. 
