110 PLANTS OF RHODE ISLAND. 
3. connatus, (Breb.) Kirch. Providence. 
Cosmarium, —, Breb. Alg. Rhod. No. 189. 
4. pseudo-connatus, Nord. Quidnessett. 
COSMARIUM, Corda. 
1. ovale, Ralfs. Common. 
2. Cucumis, Corda. Providence, Mr. Lathrop ; Quidnessett. 
3. constrictum, Delp. Providence. 
4. Scenedesmus, Delp. Common. 
5. quadratum, Ralfs. Davisville, &c. 
6. granatum, Breb. Spectacle Pond, &c. 
7. moniliforme, Ralfs. Neutakonkanut. 
8. globosum, Bulnh. Spectacle Pond, &c. 
9. bioculatum, Breb. Common. No. 134. 
10. tinctum, Ralfs. Davisville, &c. 
11. nitidulum, DeNot. Quidnessett, &c. 
12. contractum, Kirch. Providence, Mr. Lathrop ; Quidnessett. 
13. sexangulare, Lund. Neutakonkanut. 
14. depressum, (Naegr.) Lund. Same locality. 
15. Meneghini, Breb. Quidnessett, Providence, &c. No. 135. 
16. polygonum, Naegr. Common, but not plentiful. 
17. notabile, Breb. Quidnessett. 
18. undulatum, Corda. Quidnessett, &c. 
var. crenulatum. Spectacle Pond, &ce. 
19. crenatum, Ralfs. Providence. No. 136. 
20. Negelianum, Breb. Providence. 
21. venustum, Rab. Spectacle Pond, &c. 
22, pyramidatum, Breb. Quidnessett, &c. 
23. pseudo-pyramidatum, Lund. Common. 
24. Ralfsii, Breb. Geneva Pond. 
25. galeritum, Nord. Providence, Mr. Lathrop. 
26. triplicatum, Wolle. Davisville. 
27. margaritiferum, Menegh. Common. 
28. Botrytis, Menegh. Common. 
29. Brebissonii, Menegh. Quidnessett, &e. 
30. conspersum, Ralfs. Auburn. 
31. tetraophthalmum, (Kg.) Breb. Quidnessett, &c. 
32. intermedium, Delp. Specracle Pond, &c. 
338. Mmicrosphinctum, Nord. Neutakonkanut, &e. 
34. sphalerostichum, Nord. Same locality. 
35. Portianum, Archer. Very common, 
36. orbiculatum, Ralfs. Spectacle Pond, &c. 
37. excavatum, Nord. Providence, Mr. Lathrop ; Quidnessett, 
* There being no drawing, description or specimen extant, it cannot be deter- 
mined what is, ‘“‘C. granditubercuiatum, Olney, n. sp.,” Alg. Rhod., No. 141. 
