rin-: FLORISSANT I.AKI; BASIN. 31 



Finally, there are about sixty Tenthredinida 1 of fourteen or fifteen species 

 and several genera. besides a single species of Uroccrida-. 



Animal remains besides those of insects are rare at Florissant. The 

 mo>t abundant is a species of thin-shelled Planorbis, which is not uncom- 

 mon, and always occurs in a more or less crushed condition; it is the only 

 mollit-k yet found there (excepting a Physa or allied form and a single 

 small specimen of a bivalve, referred to above in the section from the south- 

 ern lake), and according to Dr. C. A. White is probably nndescribed, al- 

 though very similar to a species found in the Green River shales, differing 

 from it principally in its smaller si/.e. 



Fi-hes rank ne\t in numbers. Fight species have been found, belong- 

 ing to four genera. ( )f Amiida- we have Amia scutata and A. dictyocephala ; 

 of Cyprinodonts, Trichophanes toliarum and T. copei ; of Catostomidae, 

 Amy/.on pandatum, A. commune, and A. fu.Miorme; and of Siluridne, Rhin- 



eastes pectinatus. All the species have I n describeil by Cope, excepting 



T. copei, which was published b\ < >shorn, Scott, and Speir. 



Several bird's feathers have been found in these beds, and a single tol- 

 erahlv perfect passerine bird, with hones and feathers, has been described 

 by Mr. .1. A. Allen under the name of Palaeospiza bella, and admirably 

 illustrated by Blake. Xo other figure of a Florissant animal has yet been 

 published. Besides these. Cope has described a plover, Charedinus shep- 

 pardianus, and writes that a finch is also found in these beds. 



The plants, though less abundant than the insects, are exceedingly 

 numerous, several thousand specimens having been studied by the late Mr. 

 Leo Fesquereux. About one hundred and sixty species have been described 

 or indicated, of which the apetaloiis plants show the larger number, sixty- 

 eight species; the next most abundant group is the polypetalous division, 

 forty species, the gamopetalous having twenty-five, the Conifene eight, and 

 the loner plants nineteen species. 



Among the exogenous plants the following polypetalous families are rep- 

 resented : the Malvaceae bv a rare species of Sterculia, besides some flowers 

 with long stamens, which are referred, doubtfully, to the genus Bombax. 

 Of Tiliaceae, a species of Tilia has been found. Of Rutaceae, one species of 

 Ailanthiis and one of Xanthoxylon. No less than ten species of Rhus rep- 

 resent the AnacardiaccH-, and two species each of Palinrus and Uhamnus 

 the Rhamnaceae. The Celastracese show three species of Celastrus and one 



