102 DESMIDS OF THE UNITED STATES. 



K. Everettense, Welle. Plate XXVIII, figs. 5, 6, 7. 



Cells about twice as Long as broad ; semicells three lobed, 

 basal lobes wide, emarginate ; end lobe dilated, notch linear; 

 two larger inflations near the middle, and several smaller ones 

 on each side, and n end lobe. Transverse view broadly 

 elliptic, with two protuberances on each side; side view shows 

 one Inflation on each side. 



Diameter 50-55 !'. 



Collected in ponds, Mounl Everett, Mass. 



This form bears some resemblance to E. affine, but it is 

 clearly separable by the broad basal lube, l>\ the absence of 

 the intermediate prominences, and by the arrangement of the 

 protuberances which produce distinct formsin transverse and 

 lateral views. 



K. ensign] i, Haas. Plate XXVII, figs. 39-43. 



Semicells Longer than broad, inflated at the base, sides 

 entire, and tapering into a long slender oeck ; end lobe dilated 

 with linear notch ; end view quadrangular, with angles 

 slightly protruding, and a swelling on each of the shorter 

 sides; end Lobe cruciform as shown on the middle of fig. 13. 



I Hameter 30-35 y. 



Rhode [sland, Massachusetts, Pennsylvania, New Jersey 



and Florida. 



E. MAMMILLOSUM, Wolle. Plate XXVI, figs. 1 I. 1 5. 



Cell in Length twice the diameter; semicells three lobed; 

 basal lobes wide and nearly half as high as the semicell, drawn 

 out in the centre into a narrow column one-third to one-fourth 

 the diameter of the body; dilated at the end, sinuate, four- 

 parted; base with six mammiform protuberances; membrane 

 punctate; end view oval with three diverging mammiform 

 prominences at each end. 



Diameter of centre of cell 68 ".; Length I L8 ;>.. 



Ponds, Mount Everett, Ma., and Susses County, N. J. 



E. intermedium, Cleve. Plate XXIX, figs. 1, 2. 



Large, considerably ion-, r than broad ; semicells three 

 lobed; basal lobe- inflated, conical, apices rounded ; end lobe 

 considerably dilated, cruciform, with a linear notch; two 

 inflations, one on each side of the middle; transverse view 



