934: Transactions of the Society. 



cells, and the little prominent granules are scattered, not arranged 

 spirally on the cytioderm. De Bary's figures give : — 



Cells, long. 222-383 yu, = -0089- -015 in. ; lat. 20-25 fju = 

 •00079-98 in. [The measure given by Dr. Eabenhorst in Flora 

 Europ. Alg. iii. p. 156 is not quite correct.] 



Leptozosma nov. gen.* 



Filamentous, long, cateniform ; not twisted or but slightly so. 

 Joints united by a strongly marked suture ; cells attenuate at the 

 ends towards the suture. Near to Bamhusina KUtz., but differing 

 therefrom in the suture. 



2. Leptozosma catenula nov. sp. Cells irregularly annular, 

 inclining to quadrate, slightly hollowed or incurved at the sides, 

 tapering rapidly towards the suture, which is thickened and projects 

 considerably. Cell-wall very thick. Chlorophyll parietal or con- 

 fluent. Malaga, New Jersey, U.S.A. 



Cells, long, (central portion) 26-30 yti = -001- -0012 in.; 

 long, total 36-38 fju = -0014-15 in.; lat. max. 26-28 fju = '001- 

 •0011 in. Fig. 2. 



Onyohonema Wallich. 



3. 0. Nordstedtiana nov. sp. Cells forming filaments of fifty 

 to sixty cells or more, connected by the curious subcapitate 

 "claspers" peculiar to this genus. Without these processes the 

 cells resemble smooth Cosmaria, as they do not possess the booklets 

 (at the ends of the segments) which pertain to 0. uncinaium 

 Wallich and 0. Iseve Nordst. Chlorophyll confluent. India, U.S.A., 

 and recently found by me at Strensall Common, near York. 



Syn. 0. inermis Turner in lit. c. ic. 



Cells, long. (sin. proc.) 14 //, = -00055 in.; lat. 18//,= 

 •0007 in.; breadth of gelatinous sheath 36-40 yu, = -0014- 

 -00157 in. ; lat. isthmi 3-4 /^ = - 00012-16 in. Figs. 3a, K 



This is a very cosmopolitan and distinct species. My friend 

 Dr. 0. Nordstedt, of Lund, at first deemed it to be a young form 

 of his 0. laeve, but as that is so much larger, and, moreover, as 

 this has been found where 0. Ixve was not present, I certainly 

 think it separate therefrom. 



CosMARiUM Corda. 



4. C. Cordanum 'Bveb., in Pritch. Infusoria, 1861 ( = CoIpo- 

 pelta viridis Corda, Aim. de Carlsbad, 1835, p. 206, t. ii. f. 28). 

 Diameter about half the length ; gently and slightly constricted in 



* Ex AfTTTos, slender, Cwc^a, a band. 



