2G8 ME. W. WEST ox SOME EllESHWATEE 



Norges Desm. p. 23, t. 1. f. 8). Forma minoe, Nordi>t. (I. c). 

 (PI. XIII. fig. 17.) 



Long. 14*5 /Lt; lat. 11-5^; lat. istlim. 6-5/^; crass. 9*5 /w. 



S&. Amongst Sy^nploca cuspidata, n. sp., on trees, summit of 

 Trois Pitons (4500 ft.), Dominica. No. 904. 



This interesting species seems to Lave a varied kind of habitat, 

 occurring in small upland tarns and pools, on dripping subalpine 

 rocks, and in the present instance on damp mossy trees. 



11. CosMAEiUM CucuEBiTA, Breb. {Balfs, Brit. Besm. p. 108, 



t. 17. f. 7.) 



Long. 40 fx ; lat. 21 /j ; lat. isthm. 19 ju. 



Hub. On trees among mosses, summit of Trois Pitons (4500 ft.), 

 Dominica. No. 903. 



Class C (E N o B I E JE. 

 Ord. YoLYOCiNE^:. 



12. EuDOEiNA STAGNALE, WoUe. {FresJitv. Alg. ofU. S. p. IGO, 

 pi. clii. figs. 11-21.) 



Yar. cellulis parvis et distantibus. (PI. XYI. fig. 10.) 



Diam. cell. 4-8-5-6 /i ; diam. coenob. 63 ^. 



Hab. Amongst mosses on trees, with Hapalosiplion intricaius, 

 n. sp., and Symploca cuspidaia, n. sp., summit of Trois Pitons 

 (1500 ft.), Dominica. No. 903. 



Class Peotococcoide^. 

 Ord. PEOTOCOCCACEiE (incl. BaJmellacece). 



13. Ueococcus i^siQSJS, Kitefz. [Chlorococcusmacrococcus, 

 Babh., et var. aureus, BabJi. Fl. Burop. Alg. ii. p. 33.] 



Diam. cell. 2.3-31 /u ; c. teg. 42 /u. 



Hah. On mossy trees, summit of Trois Pitons (4500 ft.), 

 Dominica. Nos. 903 and 904. 



14. Cebasteeias staveastroides, nov. sp. (PI. XIY. fig. 16.) 

 C. quadriradiata e corpore distincto, radiis elongatis sensim 



attenuatis et minute granuhitis, apicc obtusis. 



Diam. c. proc. 30-35 ^x ; diam. corpor. circ. 9-9-5^. 



Jlab. AVith ^cyloncma javanicum, Bornet, amongst mosses, 

 on lime-trees, Slianlord Estate, Dominica. No. 901. 



The rough arms of this species remind one very forcibly of a 

 small JStaurasfrum, and sulliciently characterize it. 



