158 



HARDWICKE'S SCIENCE-GOSSIP. 



[July 1, 1867. 



Eunotia incisa (Gregory) . — Valves arcuate, slender, 

 with obtuse or subacute apices, and subterminal 

 notches or depressions on the ventral margin ; striae 



Fig. 161. Fig. 162. 



Eunotia septena, x 500. Eunotia caraelus, x 500. 



delicate. The preceding species of Eunotia are 

 common in this deposit (fig. 164). 



Fig. 163. Eunotia bactriana, x 500. 



Himantidium undulatum (Smith). — Valves arcu- 

 ate ; constricted near the extremities, with a central 

 inflation on the concave surface, and one or more 

 dorsal elevations ; striae 22 in 1'. 



1 



Fig. 164. Eunotia incisa (Greg.). 



Figures 165 a and b are considered by Lewis to be 

 sporangial varieties of the above ; common. 



Fig. 165. Himantidium undulatum. 



Actinella punctata (Lewis). — Frustules linear 

 arcuate, commonly in radiating clusters of from sis 

 to twelve individuals. Valve arcuate, with a well- 

 marked notched inflation at the free extremity ; 



Fig. 166. Actinella punctata Fig. 167. Actinella punctata, 

 in situ, x 100. valve x 400. 



smaller (attached) end rounded, sharp, with con- 

 vergent striae, and a row of marginal puncta. Eig. 



167, valve magnified 400 diameters ; fig. 166, frus- 

 tules in situ ; from Dr. Lewis's drawing magnified 

 100 diameters. 



Fragments of this strange form are not uncom- 

 mon in the deposit. Dr. Lewis considers it related 

 to Eunotia, and representing a near approach to the 

 Nitzschioid type. I am, however, not prepared to 

 admit this ; and judging from examples that have 

 come under notice in this deposit, and in a recent 

 gathering, I should feel inclined to place it close to 

 Synedra. The remainiug forms observed in this 

 deposit will be described hereafter. 



Norwich. 



F. KlTTON.* 



NEW BRITISH MOSS. 



AMONG some mosses placed in my hands by 

 Mr. M. C. Cooke, and collected in the Clova 

 district by the late A. O. Black, are specimens of 

 a fine Dicranum, which appear to be identical 

 with a Norway species established by Professor 



Fig. 168. 

 Dicranum arcticum. 



Fig. 169. 

 Leaf and section magnified. 



Schimper, in his recently published "Musci Europaei 

 Novi," Fascic. 3, and characterized as follows :— 



* The strise as shown in the figures are not intended to 

 represent the distance apart as described in the text, but the 

 general appearance of the valve as seen by oblique light. 



