ALGiE. 181 



TAHITI. 



BlDDULPHlA? FULCHELLA, Gray. 



Climacospeleria moniligera, Ehr. 



Cocconeis Parmula, Bail. & Ilarv. (Tab. 9, fig. 28.) 



G. late elliptica, linea media longitudinali notata, utroqne latere cost is 

 (yel sulcis) transcersis magnis 10-12 irregidaribus impressa, super- 

 ficie transversim striato-granulata. 



Lorica broadly elliptical, with a longitudinal line through the 

 middle, and 10 to 12 large and irregular transverse ribs or grooves. 

 Surface with transverse rows of minute, rounded granulations. 



Cocconeis fastuosa, Ehr. 



Epithemia Musculus, Kutz. 



Gaillionella sulcata, Ehr. 



Grammatophora oceanica, Ehr. 



* Htalosira punctata, Bail. & Harv. (Tab. 9, fig. 29-30.) 



H. loricis magnis in catenas longas co-ordinatis rectangidis subquadratis 

 transversim interrupte vittatis ; vittis medio loricas altemantibus gra- 

 nulatis, alternis serie punctarum insignium ornatis. 



Loricse large, quadrangular, united in ribbons. Individuals nearly 

 square, with transverse, granulated strise, which alternate at the middle 

 line; the alternate striae marked with rows of large internal dots. 



Navicula elongata ? 



Navicula Sigma, Ehr. 



Pinnularia peregrina, Ehr. 



Podocystis Adriatica, Kutz. (Tab. 9, fig. 27.) 



Stauroptera aspera, Ehr. 



* Triceratium concavum, Bail. & Harv. (Tab. 9, fig. 24-26.) 



T. lorica lateribus valde concavis angulis rotund atis, svperficie tit in T. 



Wilkesii notata. 



46 



