90 JOURNAL OF THE [July, 



Baltjickii, not quite identical, but evidently varieties of the 

 same genus. Also that on the same slide was a curious form of 

 Navicula forcipata, with the unstriated lyrate space not extend- 

 ing to the nodules. And further, on the exhibit No. lo, that 

 Schmidt says — Atlas, Plate 55 — " C. hibernicus, Ehr. = C. cos- 

 tatiis y" and, according to Greenovv, C. noricus may be dis- 

 tinguished from C. hibernicus by the costae of the former being 

 closer than those of the latter. 



Mr. Schultze donated slides Nos. 9 and 10 to the Cabinet of 

 the Society. 



On motion, the thanks of the Society were tendered the 

 GROLIER CLUB for an invitation to inspect the Japanese 

 paintings, publications and manuscripts on exhibition at the 

 time in the rooms of the Club. 



Meeting of April 19TH, 1889. 



The Vice-President, Mr. P. H. Dudley, in the chair. 



Fourteen persons present. 



H. Hensoldt, Ph. D. and the Rev. Albert Mann were elected 

 Resident Members ;.and Alfred C. Stokes, M. D., and Messrs. 

 K. M. Cunningham and C Henry Kain were elected Corres- 

 ponding Members of the Society. 



OBJECTS EXHIBITED. 



1. Spores of the fungus, Gymnospora/i}:;ium fi/scum, DC, from 

 trunk of the Red Cedar, Junipenis Virginiana, L.: by J. L. 

 Zabriskie. 



2. Larva of Mosquito : by L. Riederer. 



3. Pupal integument and imago of Mosquito : by L, 

 Riederer. 



4. Transverse section of spiracle and trachea of an Ant, For- 

 mica Pejinsylvanica : by L. Riederer. 



5. Section of Limestone, from the material of the new build- 

 ing of the New York Times : by James Walker. 



6. Section of wood of Pinus paiustris, Miller, Georgia Pine, 

 showing the spiral growth filling up the space, which would 

 otherwise be left between the tracheids on the upper side of a 



