10 
N. Kendalli (nov. sp.) 142 (10:27:10) Crat., 180 (14:33:14) s12 to 184 (11:30:11) 
sll to 12: 
Halophila, meaning “‘salt loving,”’ is given in Paragallo’s Marine Diatoms of 
France as found in brackish water in France, Belgium and England. Perrolettii 
and Kendalli may be the same possibly, the one from Senegal, the other from 
Alberta. 
ADDENDUM 
BY : 
A. H. MacKay 
The varieties and forms of Navicula cuspidata Ktz. from Airdrie were de- 
scribed before I had obtained Cleve’s Synopsis of the Naviculoid Diatoms, 1894; 
the works of Héribaud and his collaborators on the diatoms of Auvergne, France 
(1893 to 1920); and the work of Pantocsek on the diatoms of Hungary, etc. 
Cleve reduces all our forms to three species: 
halophila Grun. (1881), 
cuspidata Ktz. with a few varieties, and 
Perrotetti. 
In the Diatoms of Auvergne the following species are described: 
cuspidata Ktz. 
halophila Grun. 
ambigua Ehr. 
[éribaudi, Peragallo 
Aubertit, Hérib. 
Bouhardi, Hérib. and 
seven varieties of NV. halophila, and three of N. cuspidata. Nearly all of these 
_ appear to be covered in our Airdrie list where the condensation is greater than 
Cleve’s. This scheme appears also to include nearly all the varieties of 
Auvergne, except possibly the smaller varieties from the tertiary travertins. 
Pantocsek’s single specimen of Craticula hungarica from a tertiary marine 
deposit in Hungary is identical with our largest Airdrie specimen of N. cuspidata 
', var. Kendalli. forma parallela (craticulated). His N. protracta Grun. var. minor 
Pant. is a small form of our var. ambigua f. radiata. 
When the valve is cuspidate we have the original specific form. When the 
cusps become capitate we have the variety ambigua. When there are no cusps 
or capitate ends, and the valves taper evenly to rounded ends, we have the 
variety Kendalli, so called on account of the splendid photo-micrographs made. 
of a number of specimens by Mr. Kendall, the best of which were received after 
the photogravures of the first were made. Each of these varieties has been 
found with the parallel striation and the central radiate striation, to the last of 
which. NV. heribaudi Peragallo is referable. The specimens so well photographed 
by O. Kendall, Jr., were collected by one of the most promising Canadian diatom- 
ists, E. C. Wheeler, of Montreal. 
164 
