Naoiculacea.] infusorial animalcules. 335. 



a creuulate border. Baltic and North Sea, ou Ceramicse. Length 

 l-2640th. 



CoccoNEis molesta (Kiitz.) — Minute, elliptic-oblong, very closely 

 ag-gregated, cxuite smooth, -without a border (linibus.) On Callitham- 

 nion, Venice. Length 1-1 800th to 1-1 680th. 



C. salina. — Narrower than C. FeiUculus, punctated, and very deli- 

 cately transversely striped near the margin. Probably is but a 

 variet}-~of C. Pedicuhts. 



C. 2»(i'iila. — Minute, quite smooth, slightly curved, elliptic-oblong; 

 the border ^^ithout any longitudinal Unes. Length l-1560th. 

 Nordhauscn. 



C. depressa. — Minute, much depressed, elliptic ; near the margin 

 punctate. Striate. Length 1-1 800th. On Cladophora. 



C. nigricans. — NiuTowly elliptic ; densely aggregated ; margin 

 (limb) rather wide, entire, of a brownish-black colour, trans- 

 versely striated; thirteen to foiu'teen striae in 1- 1200th. Length 

 1- 1200th. On Conferva at Trieste. 



Var fh.J C. denudata. — Limb wanting, also the transverse dotted 

 stri®. Length 1-1 320th. 



C. ohhmja. — Oblong-elliptic, apices rather acute, with longitudinal 

 lines. Length 1 -320th. On Confer-"^. North Sea and Indian Ocean. 

 C. consociata. — Broadly elliptic ; disc mostly "with radiating punc- 

 tate stiise, thirteen on each side, with a central longitudinal hyaline 

 line. Length 1-1 320th. On Conferva. Baltic. 



C. aggregata. — Oblong-elliptic, surrounded by a broad margin, 

 which is lacerato-crenulate ; disc, near the margin, with finely- 

 dotted rays ; and in the middle with dotted fine lines. Length 

 1 - 1 440th. In Baltic and North Sea. 



C. nidulana. — Elliptic-oblong, very smooth; on the side oblong- 

 rectangular. Length l-1320th. Coast of Normandy. 



C. striata. — Of middling size; elliptic-oblong, transversely striated. 

 Cuba, Mexico, United States. 



C. pinnularia. — Rounded eUiptic, the margin and disc (save the 

 crenate longitudinal medium line) transversely stiiated. Florida 

 coast. 



C. marginata. — Elliptic ; margin punctate (in older specimens with 



