1879.] •"*• grazer. 



and it might, on this account, be anticipated that its fauna would present a 

 larger representation of continental tj r pes than the more northern islands of 

 the series. That this is the case is shown by the present very limited list, 

 which includes two Brazilian species of the genera Amiva and Drymobius. 

 None of the species of the Dominica list were found on Tobago by Mr. 

 Ober. 



VIII. Northern Bolivia, Orton. 



Among the collections sent by Prof. Orton to Philadelphia before his de- 

 parture for the Beni River, was a collection of reptiles from La Paz, on the 

 eastern slope of the Andes, in Western Bolivia. This city, as is well known, 

 is situated a short distance above the forest line, and enjoys a temperate 

 climate. 



In packing, some specimens from Puno, on Lake Titicaca, were mixed 

 with those from La Paz. As reptiles are rare at that elevated locality it is 

 probable that most of the species enumerated were derived from the latter 

 place. 



Bi/fo spinulosus Wiegm. 



O.r.yrrhopus doliatus D. and B. 



Aporophis tmniurus Tsch. 



Boihrops microphthalmia Cope, Journal Academy Philadelphia, 1875, 

 p. 182. 



Scales in twenty-one longitudinal rows, all cariuate excepting the first 

 row, the keels not unusually prominent, and not reaching the apex of the 

 scale. The second labial scute bounds the maxillary fossa in front, but it 

 is partly cut off by suture on both sides. 



In the above characters the single specimen of the collection differs from 

 the type. The latter is large, the present individual is small, and the less 

 development of the keels of the scales is perhaps due to immaturity. The 

 scales on the top of the head are larger than in other species of the genus 

 but not so large as in the type. The superciliaries are wide as in it, and 

 there are only seven superior labials. The color of the inferior surface is, 

 anteriorly, mixed black and gray, posteriorly black. 



Fossil (?) Forms in the Quartzose Rocks of the Lower Susquehanna. By 

 Pi rsifor Frazer, Jr. With a plate. 



{Read before the American Philosophical Society, April 4, 1879.) 



The forms which accompany and illustrate this paper are found in a 

 hard quartzose greenish rock, difficult to name, which forms part of the 

 left border line of the great river in Cecil County, Maryland, just below 

 the Pennsylvania line. 



By a mistake (not the fault of the writer) in the title, the figures are given 

 as from Lancaster county, Pennsylvania. In reality the discoverer of these 

 curious and as yet unexplained phenomena, Dr. C. H. Stubbs, of Fulton 

 proc. ajwu. rnn,os. soc. xvin. 104. 2.t. printed sept. IS, 1S7'.». 



