THE ANNALS 



AND 



INIAGAZINE OF NATURAL HISTORY. 



[FOURTH SERIES.] 

 No. 16. APRIL 1869. 



XXXIII. — Xotes on FiUgerous Green Infusoria of the Island 

 of Bombay. By H. J. Carter, F.R.S. &q.. 



[Plate XVri. figs. 10-24.] 



Many species of Euglena have been described, and allusion 

 made to their occasionally tessellate-encysted and frond-like 

 forms, but in no previous instance, I think, has the cyst been 

 shown to present a trumpet-shaped extension like the follow- 

 ing, which peculiarity, more than anything in the Euglena it- 

 self, seems sufficient to entitle it to a distinct ajipellation. 



Euglena tuba^ mihi. 



Active state. — Fusiform, cylindrical, fish-shaped ; obtuse 

 anteriorly, where it terminates in the so-called double lij) and 

 single cilium ; posteriorly terminating in a short, pointed, trans- 

 parent caudal prolongation. Eye-spot, contracting vesicle, 

 nucleus, and general contents the same as in Euglena viridis. 

 Ehr. (PI. XVII. fig. 13). 



Encysted state. — Cyst gelatinous, globular, transparent, co- 

 lourless, with polar elongations corresponding to the anterior 

 and posterior extremities of the Euglena : posterior one short, 

 pointed, closed ; anterior one extended into a tubular prolon- 

 gation, which ends in an open trumpet-shaped expansion. 

 Size of body of largest cyst l-60()th of an inch in diameter j 

 tubular extension of erpial length (figs. 10-12). 



Ilab. Fresh water, spreading by division, during encystment, 

 over the surface of the water in a deep quarry-pit tank, in 

 the island of Bombay, throughout tlie dry season. Forming 

 frond-like aggrcgaticms, one cell deep, united net-like by con- 

 stricted portions, and surrounded generally by a soft gelatinous 

 envelope ; finally extending over the whole of the tank, to 

 whose surface it imparts a more or less ferruginous tint, arising 



Ann. d: Mag. N. Hist. Ser. 4. TW. iii. 19 



