34 The West American. Scientist. 
tion and external appearance have been well described by Jordan 
and Gilbert in their Synopsis of N. A. Fishes, and their minute 
structure 1s the subject. of a paper in press by Mr. Frederick C. 
Test. Carl Ff. Exgenmann and Rosa S. Eigenmann. 
SAN DIEGo BIOLOGICAL LABORATORY, April 1, 1889. 
COLORADO NOTES 
A form of pisidium pusillum, a minute fresh-water bivalve, is 
reported from Delta county. 
Among the fifteen species of liverworts known to Colorado is 
Marchantia polymorpha, which is reported as being exceedingly 
abundant on the banks of streams on the east slope of the Sangre 
de Cristo range in Custer county. 
A perfectly black example of the black-tailed deer has been 
reported from Piney river, and it is said that : an albino was found 
some years ago near Canon city. 
Wolverines have lately been reported as occurring in Gilpin 
and Eagle counties. 
~The wild mountain goat is said to have formerly existed in 
Middle Park. 
The common harebell (campanula rotundifolia), although of a 
deep blue color, often turns white in the process of drying for 
the herbarium. There is, however, a white variety, and a most 
curious fact, first observed by Mrs. M. E. Cusack, is that the 
flowers of this variety turn blue in drying. 
All observant people must have seen the yellow spiders ¢ on yel- 
low flowers, and white spiders on white flowers, that catch bees 
and other insects which visit the flowers—not noticing their ene- 
mies because of their deceptive coloring. | These spiders live by 
their looks, and never go to the trouble of spinning a web. 
James Angus considers that these white and. yellow spiders be- 
long to the same species, and that they can change their color 
according to the flower they select. 
The bulbs ot Calochortus are frequently destroyed by an 
orange-colored maggot, which feeds upon them. 
The mountain rat (neotoma cinerea) is troublesome in western 
Custer county, from about 8,400 feet to 10,000 feet altitude. 
Some snails collected at West Cliff are identified by C. F. 
Ancey as Pupa hebes, P. ingersolli, Vallonia n. sp., Physa n. 
sp. (?). 
Among the animals now known to exist in Colorado are forty 
species of mammals and five varieties; three hundred and fifteen 
species of birds and forty-seven varieties; four species of rep- 
tiles; two species of fish; fifty-six species and eleven varieties of 
mollusca; four hundred and seventy-six species and twelve va- 
