Naviculacca-I infttsoeiai, ANiMAtcTTtES. 457 



BiDDTTxrTiTA cirrhm. — A new spocics, in earth froni Barhadocs. 



B. Tridcns = Dcnticolla Tridcm (1838.)— Kiitziug is disposed to 

 consider this identical with liis Biddulphia trilocularis. 



B. I-cevls = (Bailey), Odontella poJijmorplia (Kiitz.) — Lorica 

 smooth ; margin entire ; each angle produced and conical, but obtuse ; 

 very small. 



B. TViolocularis (Xutz.) — "With two septa on the sides, and three 

 colls. Cuba, Peru. Kiitziiig considers B. jndchella, and Denticrlla 

 Biddulphia (Ehr.) to be forms of this species, and probably also 

 Benticelh tridens. 



B. Qinquelocularius (Kiitz.) — With four lateral septa, and firo 

 cells. Not uncommon. This, too, partly corresponds to the B. ^;^<^ 

 cMla (Ehr.) 



B. Septemlocularis. — With six lateral septa, and seven cells 

 (loculi.) Canary Islands. 



Genus CLiM.vcosrnENiA. — Lorica simple, longer than broad, sessile 

 or free, wedge-shaped, divided into cells by internal septa, disposed 

 like the steps of a ladder (scalaiiform.) 



This genus resembles Podosphenia or Echinella, except in having 

 the peculiar transverse septa. 



C. moniligera. — Minutely striated transversely on the sides 

 (margins); septa ten to eleven in number. (P. 14, f. 45, 46.) 

 Cuba, Mexico. 



C. anstralis. — Very shortly stalked ; margins smooth. On Alga^, 

 New Holland. 



Genus Cocconema. — Lorica simple, siliceous, composed of two or 

 more pieces; longer than it is broad; attached hj one of its 

 extremities to a pedicle, in the direction of its axis ; it is smooth 

 externally, and transversely furrov/cd inteniaUy ; it has two central 

 and four terminal (^. e. two at each extremity) openings ; hence this 

 genus is closely allied to Navicida, and its members might be called 

 pedicled Naviculce, were it not that their two sides are not symme- 

 trical ; although, indeed, in this respect, a transition is exhibited by 

 Navicula ineqxialis. 



The gi'anular contents are of a brownish or greenish colour, and 

 divided into four parts ; one or two bright shining spots (vesicles) 



H H. 



