MUSCI AND HEPATICiE OF THE ' CHALLENGER ' EXPEDITION. 59 



arranged ; outside this zone is a narrow fawn-coloured border finely 

 striate. Observed in the front view, the outer edges of the two valves 

 fit closely together without any intervening connective band. 



* 



Gephyria Dyerana. Marine. PL I. fig. 10. 



Length of frustub '0038 ; breadth, on side view, '0018. In front view 

 the frustule is arched at the extremities, the intervening portion be- 

 tween nearly flat ; margins marked with short linear striae. On side 

 view the valve is slightly arched, ends cuneate ; costate striae distri- 

 buted in two series, separated by a strongly marked undulate line 

 running from one end to the other in the middle of the valve, the 

 costate pannels on the lower side of this line being alternate with 

 those on the upper. 



This species is considerably* larger than any hitherto described ; 

 and I name it after Professor Dyer, to whose kindness I am 

 indebted for the gratification of examining these very interesting 

 c llections. 



* * 



-■*» 



XXIX. The Musci and Hepaticae collected by H. N. Moseley, 

 M. A. . /Naturalist to H.M.S. >' Challenger.' By William 

 Mitten, A.L.S. 



[Read April 15, 1875.] 



Teneriffe. 



Entosthodon Templetoni (Hook.). 



A single fertile and a few young stems. 



Mnium rostratum, Schrad. 



Small barren stems. 



M. UNDU latum, Hedw. 



* 



In the same state. 



Hypnum illecebrum, Schwaegr. 

 A few fragments without fruit. 



i 



Pogonatum aloides, Hedw. 



Specimens complete, w r ith fruit. 



Polytrichum piliferum, Schreb. 



Barren. 



Southbya stillicidiorum (Raddi). 



Without fruit. Growing on earth. 



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