Miscellanies. 195 



length. In one specimen the carbonate rested on green prehnite ; 

 decomposition, indicated by the deep striae in the lines of cleavage, 

 had apparently commenced in the lime, and had been subsequently 

 arrested, crystallization recommencing, as the sharp edges produced 

 by decomposition were covered with an infinite number of minute 

 crystals. Another specimen assumed the form of a nodule six inches 

 in diameter, bearing a strong resemblance to the carbonate of iron. 

 Stilhite is found in cavities of prehnite, assuming the form of the 

 rhombic prism without modifications ; also with the modification a 

 and c. Chabasie, on prehnite, of a rhomboidal foi'm is met with, 

 measuring 94° 46' and 85° 40', generally of an opaque milk white 

 color, and one sixteenth of an inch in size. Laumonite, abundant. 

 Other minerals had been found which he had not been able to deter- 

 mine. 



July 3, 1839. — C. K. Dillaway, Esq., in the chair. 



Dr. D. H. Storer exhibited living specimens of male and female 

 Syngnathus. He stated that numerous males had been taken in this 

 vicinity during the present season, in all of which there existed a 

 pouch on the abdomen, posterior to the anus, in which were numer- 

 ous ova ; these last were hatched in the course of twenty four hours 

 after they were taken. The females were subsequently found and 

 recognized by the existence of ovaries. The female deposits the 

 ova in the pouch of the male, where they remain until hatched. 



July 17, 1839. — Dr. A. A. Gould, in the chair. 



Dr. D. H. Storer stated that since the last meeting he had had 

 an opportunity of seeing a large specimen of the Carcharias ohscu- 

 rus of Le Sueur, taken off Nahant. This specimen was about nine 

 feet long, and weighed 800 or 900 pounds. There were six or seven 

 rows of well formed teeth, but only one row above and two below 

 had as yet made their appearance through the lining membrane of 

 the mouth ; all the teeth were serrated. 



Dr. S. also exhibited a specimen of Emys Blandingii of Holbrook, 

 taken in Haverhill in this state. The only localities heretofore known 

 were the prairies in Illinois and the territory of Ouisconsin, where 

 they are said to be abundant. This species belongs to the section 

 Hiantes, (Dum. and Bibron,) being unable perfectly to close the shell. 



Dr. T. M. Brewer stated that considerable doubt existed with re- 

 gard to the color and configuration of the eggs of the Chicadee. He 

 had during the last week received two specimens which were small, 

 oval, and uniformly speckled with red spots. 



Mr. J. E. Teschemacher exhibited specimens of the following 

 plants brought from the Blackstone river, by Mr. F. A. Eddy, a mem- 

 ber of the society. — Scirpus sylvaticus of Lin., Willd., Vahl, Hooker, 



