58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



tioiis on the plates show the characters of the species so well that I 

 will leave to each investigator the decision as to whether the species 

 of the fauna he may be considering are similar to those of the 

 Chinese Cambrian. In the following notes only general statements 

 and "conclusions are given. 



Alger. — So far as known no true Algae have been found, but fill- 

 ings -of mud cracks and annelid trails occur resembling stems of 

 Algae ; their true character may be determined by comparison with 

 similar recent phenomena. 



Foraminifera. — The almost total absence of Foraminifera is prob- 

 ably due to oversight connected with hurried collecting and to the 

 absence of favorable conditions for the presence and preservation 

 of specimens. The one species Globigerina ? mantoensis [plate i,^ 

 fig. I ] is all that has been detected in the relatively large collections. 



Porifera. — Only a few spicules of Protospongitt are known. These 

 indicate that when a favorable locality is discovered a fine represen- 

 tation of the sponges will be found. 



Anthosoa. — One genus with one species of Coscinocyathus sug- 

 gests the great development of the Archaeocyathinas in the Atlantic 

 Basin fauna as found in the islands of Sardinia and Newfoundland, 

 and the Pacific Basin fauna in the Cordilleran area of Nevada in 

 western America. In Asia the type is known from Siberia as de- 

 scribed by Eduard von Toll." 



Annelida. — A few trails are all the traces that have been found 

 of the annelids. One of these is illustrated by plate i, figure 5. 



Brachiopoda. — Among the brachiopods none of the genera is 

 peculiar to the Chinese Cambrian. All belong to genera found in 

 the Middle Cambrian of western North America and northwestern 

 Europe. The genus Micromitra is well developed and I have in- 

 serted on plate i, figure 13, a photographic reproduction of a speci- 

 men from the Middle Cambrian of British Columbia, that has the 

 pedicle and surface spines finely preserved. 



Gastropoda.- — The patelloid forms are represented by two genera, 

 Scenella and Matherella, and three species, two from the Middle 

 Cambrian (C 18, C 70) and one from the Upper Cambrian (C 56) ; 

 the cone-shaped forms by three species of the genus Helcionella, 

 one of which, Helcionella rugosa chinensis [plate 5, fig, 8], has a 



' The plate numbers refer to plates accompanying the large memoir on 

 " The Cambrian Faunas of China," Pub. No. 54, Vol. 3, Carnegie Institution 

 of Washington. 1913. 



" Mem. de I'Acad. imp. des sci. de St. Petersbourg, 8th ser., Vol. 8, No. 10, 

 1899, Beitrage zur Kentniss des sibirischen Cambrium. 



