72 DBSMIDS OF THE UNITED STATES. 



granules; end view elliptical with four granules <>n cadi side; 

 lateral view circular, with two inconspicuous granules on 

 opposite sides ; membrane punctate. Isthmus about one-third 

 of the diameter. 

 I Kameter '!< ft. 



Brown's Mills, New Jersey, is the only locality which has 



hitherto furnished this form. The original, found in Brazil. 



differs somewhat in the " siwu lineari, extrorsum vix ampli- 



ctio;" Our form has the sinus decidedly enlarged towards the 



mouth. 



( '. A.NISOCHONDR1 M. Nord. Plate XVI, figs. 13-45. 



Cells subquadrate, length and breadth nearly equal ; sinus, 

 narrow linear; Bemicells Bubsemicircular, dorsum broadly 

 truncate; in centre two horizontal rows of large granules oi 

 three each, and two intermediate granules below and above; 

 smaller granules, more scattered on each side ; viewed from 

 the vertex, elliptic, witli three larger granules on each Bide and 

 a Dumber of Bmaller one- within the margin; the middle 

 bare; lateral view obovate, circular, Isthmus one-third the 

 diameter of cell. 

 Diameter 30-38 ft. 



Denmark pond and other ponds of northern New .Jersey. 

 The original of this species was collected on the Sandwich 

 Islands and described by Dr. Nordstedt. 



C. kitchelii, Wblle. Plate Will, figs. 1-3. 



Cells suborbicular, about one-fourth longer than broad, 



deeply constricted; -inn- narrow linear; semicellfi Bemicir- 

 cular, margins crenulate, with about 18 crenae; within, two 

 concentric rows of granules corresponding with the crenae; 

 area smooth excepting two, rarely three, transverse rows of 

 three larger granules each, in the middle; viewed from the 

 vertex, ovate-elliptic with three larger grannie- on cadi side, 

 and four series of -mailer grannie- extending from end to end ; 

 lateral view circular with two granules on each side, and four 

 central -cries. 

 Diameter 10 ft. 



Collected by Rev. H. D. Kitchel in a p md near Ham- 

 monton, New Jersey. This species i- readily recognized by 

 the large marginal granule-, end and side view, and by the 



