The Fungi of Texas. 177 



The height of water over the rifle, according to my experi- 

 ments, makes no difference, as the same results were obtained 

 when the rifle was submerged five inches as wnen sub- 

 merged 12 inches. This is not singular, when we consider the 

 rapidity with which the bullet travels and the short time the 

 column of water has to act on it. The cause of the limited range 

 under water, then, is the fact of the motion of the bullet being 

 opposed by a medium of much greater density than the at- 

 mosphere. 



The variation between different rifles, from my experiments 

 I have been led to believej is due in part to differences in the 

 length of barrel, in the size of bore, and in the internal struc- 

 ture of barrel ; but more particularly to the fact that as a 

 rule the amount of powder and bullet are not only in absurd 

 relations to each other, but are not in correct proportions for 

 the length and bore of barrels peculiar to different rifles. 

 These facts only demonstrate that there is a large number of 

 very important points yet to be examined. 



XVIII.— The Fungi of Texas, 



BY M. C. COOKE, M. A., LL. D. 

 Corresponding Member N. Y. Acad. Sci. Eead May 27th, 1878. 



The following is an enumeration of all the species of Fungi 

 which, so far as I am aware, have hitherto been detected in 

 Texas. In addition to the few collected by Wright and 

 others, and mentioned in Berkeley's North American Fungi, 

 a small collection of two hundred specimens, gathered a few 

 years since by Mr. H. W. Ravenal, has been examined ; and 

 after the determination of these, the whole number of species 

 does not exceed one hundred and fifty. This is a very poor 

 catalogue for a State which is undoubtedly rich in these 

 plants ; but the enumeration will possess an interest and a 



