314 ANNUAL KECORD OF SCIENCE AND INDUSTRY. 



ments were conducted with strychnine, morphine, thebaine, 

 and the iodide of tetramethyl-ammonium. QJB,Dec. 8, 1873. 



STRUCTURE OF THE EMBRYONIC CELLULE IN THE EGGS OF 



BONY FISHES. 



Balbani, as the result of investigations of the embryonic 

 cellule in the egg of the bony fishes, informs us that the egg 

 itself presents the same composition as that which he had 

 previously endeavored to show exists in the egg of the ar- 

 ticulates : namely, that in both forms of animals the germ is 

 in the form of a vesicle, spread out on the surface of the egg, 

 and containing the nutritive vitellus in its interior. Not only 

 do the plastic and nutritive portions exhibit a complete mut- 

 ual independence, from the earliest point when ovogenic 

 phenomena are appreciable, but each has a different origin. 

 Thus, while the nutritive substance is deposited in the centre 

 of the egg, with or without the occurrence of foreign elements 

 from outside (a point still discussed by authors), the germ is 

 formed on the periphery, under the influence of a particular 

 cellule the embryogenic which proceeds from the wall to 

 the ovarian compartment, and which subsequently becomes 

 united to the young ovule. 6 B, December 8, 1873, 1377. 



THE EMBRYOLOGY OF TEREBRATULINA. 



A memoir upon the embryology of Terebratullna, by Pro- 

 fessor Morse, has just been published by the Boston Society 

 of Natural History, this being the result of a thorough in- 

 vestigation in regard to the development of this genus of the 

 brachiopod shells found so abundantly on the coast of Maine. 



Professor Morse's labors were mainly prosecuted at East- 

 port, and extended through a period of several years. He 

 found that the species spawns throughout the entire summer 

 season (at least from April to August), but that investigations 

 in the earlier part of the season were preferable, since, with 

 the increasing warmth, the development is more rapid than 

 is convenient to the observer. 



VARIATION IN THE BANDED SHELLS OF CALIFORNIA. 



Dr. J. G. Cooper has lately published a paper upon the law 

 of variation in the banded shells of California, in which he 

 renews certain considerations previously stated in Vol. IV. 



