Navicidacea.'] infusohial ANiMAtcuLES. 407 



SuniKEi.LA (?) Jinea. — Eacillar, largo ; one side cuneate, the otliev 

 rounded, minutely and transversely striated throughout. Length 

 1 -240th, 



S. stijlus. — Large, styliform, and narrow, quadrangular ; one end 

 more obtuse than the other, but neither acute ; pinnules fifty-four in 

 l-144th. Length l-144th. 



S. CaJedonica. — A species discovered by Elii'enberg, in earth sent 

 from Ireland. 



S. plicata. — From the same source. 



S. a!<pera. — Large, with loosely disposed pinnte, which also present 

 rough crests, four to five in 1-11 5 2nd. Ehrenbcrg says, "I have 

 seen but a fragment, if a Campyhdisms ? " From volcanic earth, 

 Hochsimmer, on the Rhine. 



S. spiralis (Kiitz.) — Primary side linear, spirally twisted, with a 

 dotted margin; dots five to six in l-1200th. Length l-300th. 

 Nordhausen. 



S. didyma. — Oblong, truncate at each end, sinuate, constricted at 

 the middle; margin punctate. Length 1- 600th, 



S. solea = Surirelh Lihrih (Ehr.) 



S. multifasciata. — Narrowly linear laterally ; dorsally cuneate, acute 

 at each end; transverse striae very fine, obsolete. Length 1 -288th. 



S. thermalis = Pinnularia (?) thermalis (Ehr.) 



S. amhigua (Kiitz.) — Broadly oblong, trmicate at each end; trans- 

 verse striae rather wide, straight, obsolete, four in l-1200th. 

 Length 1 -264th. Bernese, Obcrland. 



S. ohlonga. — One end attenuate, broadly obtuse, and rounded, 

 Binuoso-dentate near the margin. Marine. 



S. elliptica (Kiitz.) = S. oophcena (Ehr.) see Cijmatopleura elliptica. 



S. Fatella. — Elongated, elliptic, equally rounded at each end ; 

 marginal striae four to five in 1 -1200th. Length 1 -300th. Fossil. 



S. augusta. — Minute, linear-oblong on sides, rectangular dorsally, 

 equally rounded at both ends, with the margin finely striated ; striae 

 eleven in 1 -1200th. Length 1 -600th. Alive in ponds, No rdhausen, 



S. ovalis. — Oblong and cimeate ; laterally ends truncate ; dorsally 

 ovate-elliptic, the one end more narrowly rounded than the other ; 

 marginal striae eight in 1 -1200th. Length 1 -360th to 1 -280th. Costal 

 only visible at margin of valves. Freshwater. 



