1887.] NEW-YORK MICROSCOPICAL SOCIETY. 21 



surface. On the interior of the tube, as well as on the fiat ex- 

 pansion, we find numerous transverse rows of minute teeth 

 which are set upon flattened plates, each principal tooth some- 

 times having a basal plate of its own, while in other instances 

 one plate carries several teeth. The former applies to the 

 terrestrial Gasteropods, while the latter to the marine Gastero- 

 pods" (as general rules). 



Buccinum obsoletum, belonging to the latter, apparently shows 

 three rows of plates, a central row having small teeth, while 

 each outer one has large lateral teeth. Each distinct, arched 

 transverse plate of the central row has seventeen curved but 

 sharp-pointed teeth, the centre one being the largest. It is 

 stated that the Buccinum (Whelk) and its allies use the flattened 

 portion of their palates as a file, with which they bore (?) holes 

 through the shells of the mollusks, that serve as their prey. 



In the specimen the teeth on one end of the palate are much 

 worn, showing that it has been used as a cutting or grinding 

 instrument. 



Query. — Is the cutting done by a pushing or drawing stroke? 



10. Hair of Chinchilla. 



11. Hair of Mouse. 



12. Tingis Hyalina. 



13. Proboscis of Tabanus Atratus (horse-fly). 



14. Section of Stomach (?) of Cat (injected). 



15. Salisburia Adiantifolia (Ginkgo tree): portion of leaf 

 (stained). 



The tree, native of China and Japan, has broad, fan-shaped 

 leaves, parallel-veined, while the structure of the wood is quite 

 similar to the Conifers, having needles, or narrow parallel- 

 veined leaves. The leaves have an abundance of stomata, 

 while the so-called veins are composed of spiral (tracheal) 

 tissue. It is quite a distinct and exceptional type of tree. Its 

 fruit is a drupe. 



Fine specimens of the tree can be seen in Central Park and 

 in Boston Common. 



Meeting of April 15TH, 1887. 

 The President, the Rev. J. L. Zabriskie, in the chair. 

 Thirty persons present. 



