294 



cells, would lead to the formation of glucose only. Nor should 

 we, in view of the experience, especially in our Southern States, 

 meet with the two or three doubtful cases recorded of sugar pro- 

 duct ; but as in the beet, the maple, and the cane, sugar, as a 

 constant jjroximate constituent, would be found in the sorghum 

 juice. 



The President gave an account of some observations 

 on the development of Anableps Gronovii, as compared 

 with that of the Embiotocas of California. 



Prof. Agassiz has described these last as having a " true ova- 

 rian gestation." This statement is true, but in a somewhat dif-. 

 ferent sense from that in which the development of Anableps 

 may be considered ovarian. In Embiotocas the ovary is divided 

 internally into numerous compartments by folds of lining mem- 

 brane which project into its cavity ; these folds are germ pro- 

 ducing, as the young ova may be seen between their layers, even 

 when the foetuses are being developed in the cavity of the 

 ovary. Nothing has been determined as yet as to the period 

 when the ovum of Embiotocas leaves the ovisac, whether before 

 or after impregnation. Wherever it has been observed, the foetus 

 has been found in the cavity of the ovary, enveloped in the long- 

 itudinal folds of its lining membrane. In Anableps, the gesta- 

 tion is carried on to its completion, or nearly so, in the ovisac ; 

 this last grows as the foetus is developed, becomes quite vascular, 

 and by its apposition with the vascular papillte of the yelk sac, 

 carries on those interchanges between the parent and the foetus 

 which are necessary for respiration and nutrition. 



Dr. C. T. Jackson exhibited to the Society a portion 

 of the supposed meteoric stone from Marblehead, which 

 was brought to him for analysis on the 14th November. 



He remarked that it bore so close a resemblance to the slag of 

 a copper smelting furnace, that he at first hardly thought it 

 worth the trouble of analyzing, but since it might become im- 

 portant to record the real composition of this alleged meteoric 

 matter,.he had made the analysis, with the following results per 

 cent. : — 



