Narieularea.'] infttsortai, VNiMALcrtEs. ;^61 



EuifOTiA uncinafa. — Small, uarrow, linear, curved; apices muck 

 constricted and capitate. North America. 



E. Zelrina = Epitheinia Zebrina (Kiitz.) — Striated, elongate; 

 dorsum evenly convex ; the convexity extending gradually to the 

 constricted but obtuse apices ; interspaces of striae dotted, " probably 

 identical with E. zehra,'" Kiitzing. New York and Ehode Island. 



E. zijgodon. — Striated, linear, oblong ; back with a furrow, render- 

 ing it bidentate, and its convex curve extending to the rounded 

 apices. Guiana 



E. Creta. — Of Caltanisetta, Sicily = Cocconcma Crsf^. 



E. amphidieranoyi. — Striated, oblong, straight, quadrangular ; con- 

 stricted on each side at the middle ; extremities emarginate, furcate, 

 (l-864th.) Fossil, Oregon. 



E. crocodilus. — Elongate, sti'iated, gently curved ; back convex, 

 depressed in centre ; venter concave, gibbous at its middle ; ends 

 subacute, rcflexed. (1 -576th.) 



E. Lima. — Striated, linear, with a lunate curve ; dorsum evenly 

 convex ; venter concave, gibbous at its centre ; ends simply obtuse. 

 (l-372nd.) Fossil. 



E. Siind. — Striated, linear, more gradually curved ; dorsum rather 

 convex ; venter concave ; ends -^^liquely subtruncate, and apices 

 reflex. (1 -456th.) Fossil. 



The following new species were discovered by Ehrenberg, iu 

 earth from New Holland : — 



E. caelafa, E. Amtrdis, E. cygnm, E. paradoxa. 



E. senaria and E. nonaria. — New species, discovered by Ehrenberg, 

 in earth fi'om Siberia. 



E. Alpha (Kiitz.) — Binate, primary side linear ; rectangular on 

 the other, dorsiim convex, apices obtuse, truncate, transverse stride 

 very slender. (1 -960th to 1 -600th.) Bernese Oberland. 



E. monodon. (Ealfs.) — Lateral view concave on one margin, 

 convex on the other ; constricted near the ends ; striae none or very 

 obscure. Fresh water pools. 



" The frustules are very minute, but vary greatly in length, beino- 

 in some specimens only twice as long as broad, and in others six or 

 seven times longer than broad. The front view has its ends slightly 

 rounded, and its pimcta very obscure. The absence of stri® may be 



