Proceedings of the Society. 1 1 3 



The minutes of the June meeting were read and approved. 



Mr. Horace P. Smith read a paper on the King Crab (Limu- 

 lus polyphemus) and its relations. 



The reading of the i)aper called forth remarks from members 

 present. Dr. Young spoke of the morphology. Mr. Dury in re- 

 ply to a question regarding the powers of vision in the "King Crab" 

 said that it probably merely distinguished dim outlines of objects 



Dr. W. A. Dun exhibited a series of drillings taken from a 

 well recently bored near Montgomery in this County, 12 miles 

 north of the city and 810 ft. above the sea level. Gas was struck at 

 385 ft., nearly at the level of the bed of the Ohio. The Doctor 

 said that the gas well at Felicity, in Clermont County, flowed at a 

 pressure of 40 lbs. The strata furnishing this supply was about 600 

 ft. from the mouth of the well. Three wells have been bored at 

 Middletown, O., without satisfactory results. The Doctor was still 

 of the opinion that gas will be found in paying quantities east of the 

 city. 



A fine specimen of a portion of the skull of Bootherium cavi- 

 frons, Leidy, was exhibited by Dr. Dun. It was found in the drift 

 on Walnut Hills. Dr. Young, by request, described the anatomical 

 characters of the skull in Bison and Bos. The specimen under dis- 

 cussion had been referred to both genera. It was too imperfect to 

 determine its proper place. 



Mr. Geo Twitchell exhibited specimens of fresh water s]:)on- 

 ges from the Ohio river. He said: 



" At the present stage of water in the Ohio river, sponges can 

 readily be found adhering to snags or stones. Of the two species 

 we have here to-night the encrusting form is immature and cannot 

 at present be identified. While the form that might almost be 

 called branching, is recognized as Cartcrius tiibispciina Mills. 'I'he 

 genus Carterius is a comparatively new one, the first specimen 

 having been found in 1879. This genus differs from the other 

 fresh water sponges in possessing appendages attached in various 

 forms to the statoblasts. The specimens we have here have the 

 staioblasts with their appendages well developed. An examination 

 with the microscope will reveal beautiful spicules, both of the 

 acerate and birotulate forms." 



The presiding ofticer read a letter to hhnself from Prof. A. P. 

 Morgan, as follows: 



