and Laboratory Methods. 2391 



CURRENT ZOOLOGICAL LITERATURE. 



CHARLES A. KOFOID, University of California. 



Books and Separates of Papers on Zoological Subjects should be Sent for Review to Charles A. 

 Kofoid, University of California, Berkeley, California. 



„ •• „,^ „, . T, ■ ■■ T- 1 On account of the relatively large 



Burger, Otto. Weitere Beitrage zur Entvvick- ■' ° 



lungsgeschichte der Hirndineen. Zur Em- embryos and the greater size of the 

 bryologie von c/c/s^^^e. Zeitschr. f. wiss. ^ell elements of the germ bands, the 

 Zool. 72: 525-544, Taf. 30-32, 1902. _ ° 



eggs of Clepsine sexoadata were used 



in this research in preference to the less favorable ones of C. bioculata. Eggs 

 and young embryos were fixed in dilute Flemming's fluid. The older embryos 

 abandoned by the mother or already free-swimming were also killed in hot sub- 

 limate or in 10 per cent, nitric acid with excellent results. Elements of the germ 

 bands are clearly demonstrated in sections of embryos gilded by Lowit's method. 

 Heidenhain's iron haematoxylin with after-stain of eosin for older embryos was 

 used in staining. c. a. k. 



Marcinowski, K. Das untere Schlundganglion The author recommends von Rath's 



y?"T,f "/«"'"" hepaticiim. Jenais. Zeitsch, N. ^^^ Mallory's hEematoxylin (on subli- 

 F. Bd. 30: 544-550, Taf. 27, 1903. •'. -^ ^ . 



mate material) for demonstration of 



fibre tracts and Delafield's or Grenacher's haematoxylin followed by picric acid 



for ganglion cells, and van Gieson's method for the nervous system as a whole. 



C. A. K. 



Perkins, H, F. The Development of Gonio- Material was collected in the eel-pond 

 nema murbachii. Proc Acad. Nat. Sci. ^t Wood's Hole in summer months. 

 Phila., 1902 ; 750-790, pis. 31-34, 1903. 



Eggs are deposited regularly at dusk 



and spawning may be artificially induced by keeping the medusce in the dark 

 for an hour, especially in the afternoon. The eggs are adhesive, and if allowed 

 to settle on glass slides they adhere so firmly that they do not wash off when 

 treated with reagents. It is possible to gather them in masses by stirring the 

 water in which they have been deposited, so that they gather in clusters and 

 adhere to each other instead of the bottom of the dish. Corrosive-acetic and 

 full strength formalin were used as fixing agents. The latter gave excellent 

 results both for fixation and preservation, and fixes tissues in fifteen to forty 

 seconds. Menthol crystals were used for narcotising larvae and adult medusse. 

 Larvae were kept alive for six months in balanced aquaria in the laboratory with- 

 out change of water. Fresh water was added to make good the loss by evapor- 

 ation from time to time. Cultures of diatoms made from scrapings from eel- 

 grass were added to furnish the required plant life. c. a. k. 



Penard, E. Notice sur les Rhizopodes der The material upon which this study 

 Spitzberg. Arch. f. Protestenkunde, 2: ^^g ^^^^ ^^S secured from clusters 

 238-282, mit 49 Textfiguren, 1903. • ■ ,, rr x c 



of moss, prmcipally Hypnum, from 



Amsterdam Island and Green Harbor, collected for botanical purposes. The 

 dried mosses were placed in pure fresh water with all precautions to prevent 

 contamination by foreign species, and the reviving Rhizopoda were studied as 

 they appeared. One cluster of moss dried and revived three times in succession 

 gave the same assemblage of organisms at each revival. c. a. k. 



