Two species are quite common at Sandusky. _Plumatella polymorpha_ as its name indicates is quite variable in form. The variety _repens_ was very common on the rocks on the south side of bay near the city. Its vine-like appearance renders it easy to identify. The Polyps are borne on the ends of the branches. The vine-like cyst clings closely to its support. The second species _Pectinatella magnifica_ was found in Black Channel on submerged fish nets. It has a large spherical gelatinous base frequently eight or ten inches in diameter, over which the colonies of polyps are distributed. The individuals in each colony are arranged in the form of an aster. These large colonies are striking in appearance. The larvae are quite numerous and are globular in shape, and swim quite freely when liberated from the parent colony. The statoblasts are found in the fall as in the sponges. The process of statoblast formation and of larval development were studied, but the budding of individuals to enlarge the colony was not followed. The statoblasts of these animals seem to need to be both dried and frozen before development will go on in the spring. ADDITIONS TO THE SANDUSKY FLORA. ROBERT F. GRIGGS. The following plants not given in the “Sandusky Flora” have been collected in Erie county. They are here given in order that those possessing a copy of Professor Moseley’s excellent flora of the region may keep it up to date. The numbers refer to the pages of the Sandusky Flora, on which the additions should be made. 44. Avena sativa L. Common Oat, escaped. W. A. Kellerman. 61. [1]Wolffia braziliensis Wedd. Brazil Wolffia Sandusky Bay, abundant at times. R. F. Griggs. 70. Populus balsamifera L. Tacmahac, abundant on some portions of Cedar Point. R. F. Griggs. 71. Salix fragilis L. Crack Willow, common. W. A. Kellerman and R. F. Griggs. 71. [1]Salix interior var. wheeleri Rowlee. Cedar Point. W. A. Kellerman and R. F. Griggs. 71. [1]Salix petiolaris var. gracilis And. Perkins twp. R. F. Griggs. 71. [1]Salix candida x cordata. Castalia. R. F. Griggs. 73. Quercus leana Nutt. (Q. imbucaria x velutina). Cedar Point, three trees. W. A. Kellerman and R. F. Griggs. 98. Crataegus sp. undetermined. Marblehead. W. A. Kellerman. 99. Prunus pumila L. Sand Cherry, two plants on Cedar Point. W. A. Kellerman and R. F. Griggs. 130. Convolvulus japonicus Thumb. Sandusky, escaped. R. F. Griggs. 156. Eupatorium maculatum L. Blue Hole, Castalia. Frederick Dunlap. 158. [1]Helianthus maximiliani Schrad. A single plant along L. S. & M. S. tracks. R. F. Griggs. 159. [1]Polymnia canadensis var. radiata Gray. Cedar Point, very abundant. R. F. Griggs. Footnote 1: Previously reported as additions to State list. See OHIO NATURALIST, 1: 15–16. MINOR PLANT NOTES, NO. 3.