294 PROCEEDINGS OP THE CALIFORNIA 



persevering and determined efforts, (on account of the violence of the wind) we 

 at length, by means of a spirit lamp, changed a portion of snow to a cup of 

 boiling water, the mercury stood firm in the cup at 180° ! These several 

 results being changed to feet of elevation, according to the rule universally ap- 

 proved iu such cases, indicate heights as follows, viz : At the summit of the 

 Cascade Range, and foot of Mt. Hood proper, 4,400 feet ; at the limit of forest 

 trees, about 9,000 feet ; at the highest limit of vegetation, 11,000 feet; at the 

 summit of the mountain, 17,600 feet. 



We earnestly hope that these results may be hereafter tested by the barome- 

 ter ; and by triangulation. Until then, we must adopt the estimate here 

 made, as the height of that sublime peak, and accord to Mount Hood the dis- 

 tinction of being the highest land in the United .States, il' not the highest upon 

 the North American continent. 



Regular Meeting, September 17th, 1866. 

 Mr. Stearns in the chair. 



Ten members present. 



Messrs. B. P. Avery, James Spiers, and B. R. Norton were 

 elected Resident Members. 



Donations to the Library : Proceedings of the Mannheim Acad- 

 emy, from Dr. Behr. 



The following paper was presented by Dr. J. G. Cooper : 

 On a New Species of Pedipes, inhabiting the Coast of California. 



BY J. G. COOPER, M.D. 



PEDIPES UNISULCATA, Cp. Fig. 29. 



Sp. ch. P. t. Lacunoida, oblique ovata, peripheria 

 laterali subrhomboidea, translucente succineo-brunnes- 

 ceute, spira producta, apice obtusa, anfr. iv et dim. ; ter- 

 tio tumido, sulcis iv, posteriori solum valde impresso, iu 

 ultimo evanescente; ult. lineis incrementis irregularibus 

 sulco undulatis; punctis impressis numerosis sparsim 

 ornato ; apertura ovata, labro acuto purpurescente intus callo duplicato medio 

 subtuberculoso ; labio columellari albo, calloso, in piano apertura? expanso ; 

 margine interno subverticali dentibus duobus subacutis, superiori majore ; callo 



