534 



SCIENCE. 



[N. S. Vol. XVII. No. 431. 



communication Avitli the exterior. There 

 is a large seminal vesicle, but no sac; 

 prostate cells are present, collected around 

 the passage from the seminal vesicle to the 

 exterior. They are not shut off by a 

 membrane from the surrounding paren- 

 chyma. I have not as yet reached any 

 conclusion as to the affinities of this form 

 with the other distomids. 



Some Recent Additions to the Marine 

 Fauna of Bermuda: C. L. Bristol, New 

 York University. 



Distribution of Fresh-water Fishes in 

 Mexico: S. E. Meek, Field Columbian 

 Museum. 



A Comparison of the Plankton of Green 

 Lake and Lake Winnebago: C. D. 

 Marsh, Ripon College. 

 . These lakes represent the two types of 

 deep and shallow lakes. Plankton col- 

 lections were made upon them regularly 

 for a period of two years and a half. From 

 these collections records were made of the 

 annual distribution of the total plankton 

 and of the principal constituents of the 

 plankton. For comparison a number of 

 other lakes were visited at different periods, 

 but upon them no continuous record was 

 kept. The attempt was, first, to accumu- 

 late a certain number of facts in regard 

 to the plankton, and then, second, if pos- 

 sible, determine some of the fundamental 

 principles controlling the distribution of 

 the plankton and its constituents. The 

 distribution of the total plankton was dis- 

 cussed briefly, and then an account was 

 given of the annual distribution of two or 

 three of the more important individuals 

 composing the plankton. Attention was 

 called to certain interesting relations be- 

 tween the occurrence of species and tem- 

 perature, and then the question of the 

 balance between animal and vegetable or- 

 ganisms was discussed at some length. 



A Combined Locker and Laboratory Table ; 

 Pierre A. Fish, Laboratory of Compar- 

 ative Physiology and Pharmacology, N. 

 Y. State Veterinary College, Ithaca, 

 N. Y. (To be published, with illustra- 

 tions, in Journal of Applied Microscopy.) 

 Specifications. — Both sides of the table 

 are to be exactly alike. Each table will 

 then have four doors, four drawers, each 

 five inches deep in the clear, and eight 

 drawers each three inches deep in 'the clear. 

 Exterior of tables and fronts of drawers 

 are to be of selected red oak ; drawer guides 

 or slides of oak, maple or cherry; and 

 balance of interior work of poplar. 



Each door shall be hung with one pair 

 good brass fast pin butts, and shall be fitted 

 with an 'anti-dial' combination lock. Bach 

 table shall be fitted with eight 'standard' 

 No. 7, all steel castors. 



Except the top, all exposed work, includ- 

 ing drawer fronts, shall be filled with silica 

 paste filler, and shall then be finished with 

 one coat of white shellac and one coat of 

 Johnson's, or equally good, wax. Inside 

 and drawers, except fronts, shall have one 

 coat of orange shellac. 



The table in question was designed for 

 laboratory work in physiology and materia 

 medica. The height and also the area of 

 the table top is somewhat greater than ordi- 

 nary for the reason that, in experimental 

 physiology, it is necessary at times to have 

 considerable apparatus upon the table, and 

 the height is desirable because in some ex- 

 periments the student can do his work 

 better standing than sitting. The foot rest 

 attached to the tables, in connection with 

 a stool a trifle higher than usual (twenty- 

 four inches), enables the table to be per- 

 fectly serviceable and entirely satisfactory 

 for all forms of work at which it is desirable 

 that the student should sit. 



The chief advantage of the table, how- 

 ever, is believed to rest upon the fact that 

 a considerable economy of space and con- 



