A L G M. 177 



TERRA DEL FUEGO. 



Entopyla australis, Ehr. 

 Grammatophora serpentina, Ehr. 

 Grammatophora stricta, Ehr. 



RIO BE JANEIRO. 



Climacosph^ria moniligera, Ehr. (Tab. 9, fig. 11.) 



A somewhat marked form, with transverse striae, exceedingly 

 minute. 



Grammatophora oceanica, Ehr, 



* Isthmia minima, Bail. & Harv. (Tab. 9, fig. 11.) 



T. zona transversali subtilissime decussatim punctata, lateribus cellulis 

 magnis granulatis. 



Lorica with the end divisions coarsely granulated, and the middle 

 band minutely punctate in a decussate manner. 



Also detected in the Sooloo Sea. Appears to differ from I. enervis, 

 Ehr., in the smaller size, as well as in the much more minute mark- 

 ings on the central band. 



Dicttocha splendens, Ehr. (Tab. 9, fig. 16.) 



We have seen this form (which Ehrenberg doubtfully referred to 

 his genus Bictyocha) under the action of acids dissolve with effer- 

 vescence, thus proving its calcareous nature. 



Spongiolites Anchora, Ehr. (Tab. 9, fig. 17.) 



This also proves to be calcareous : like the last, it polarizes light 

 and dissolves in acids. 



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