268 



Dr. Gould said that he had frequently seen a species 

 of spongilla in these pipes. 



Dr. C. T. Jackson said that specimens could be ob- 

 tained at the Brookline reservoir gates. They are of a 

 yellowish green color. 



Dr. J. B. S. Jackson said that he had met with small 

 specimens in the pipes of his house, perhaps two or three 

 lines in diameter, and seven or eight in length. 



Dr. A. A. Gould said he had received a letter from 

 Prof. Dawson of Montreal, stating that there had recently 

 been a slide in the neighborhood of that city, by which 

 many new species of tertiary fossils were exposed, and 

 amongst them some spiculae of sponges. 



Dr. J, B. S. Jackson exhibited specimens of Dermestes 

 and a block of wood, forming the support for an anatom- 

 ical preparation, into which wood the insect had eaten. 

 He was not aware before that this animal attacked 

 wood. 



Dr. C. T. Jackson presented, in the name of Samuel 

 Swan, Esq., some specimens of the common Water Lily, 

 [Nymphcea odorata.) They were procured from a pond 

 in Yarmouth, Mass., and were peculiar in this respect, 

 that the flowers were of a delicate pink color, instead of 

 being, as ordinarily, white. Dr. J. had noticed, several 

 years since, in Mossy Pond, in Lancaster, this same lily 

 with flowers of a deep red color. He suggested that they 

 were probably only varieties of the same species pro- 

 duced by ferruginous or other modifications of the soil 

 in which they grew. 



The President exhibited some species of fishes from 

 the Surinam River, and mentioned some conditions, here- 

 tofore unnoticed, under which the eggs are developed. 



In a species of Bagrt^ called by the negroes " Ningi-ningi," 



