117 



eifelicnsis and ^S". citriosa from Gerolstein at hand ; as it is not provided with 

 any sharp eminences, on its surface, the Avriters believe they are justified in 

 i-xeferring it to S. eifelicnsis. 



S. cifclieiisis is a fossil common in the Calccola beds of Eifel ; it is 

 also known from the contemporaneous deposits of Poland, of Daheha on 

 the Araxes^^ ; and a very similar form is recorded from the Middle Devonian 

 Padaukpin limestone of northern Shan States. Further, it is recorded from 

 the Devonian of Western Australia. 



Locality : — West of Alen-kan-shan, Tien-chuen-chou, prov. Sze-chuan. 



Geological Horizon : — Middle Devonian. 



Tabulata. 



, ' Chaetetidae. 



Chaetetes Fischer. 

 Chaetetes tenuissimus Frech. 



1885. Chaetetes tcmiissiuius F"rech ; Nachtrag zu Korallenfauna des 



Oberdevons in Deutschland. Z. d. deutsch. geol. Gesell., vol. 



XXXVIL, p. 954, figs. 14-16. 

 1894. Ch. tenuissimus Frech : in Suess' Beitriige zur Stratigraphie Cen- 



tralasiens. Denksch. Mat.-Nat. Kl. K. Akad. d. Wiss., Wien, 



vol. LXI, p. 12. 



191 1. Ch. tenuissimus Frech : in Richthofen's China, vol. V., p. 50. 

 Colony forming a thin crust, hardly 1.5 mm. thick, over a subsphaeroidal 

 ''Colony of Alveolites ramosits. Cells straight, columnar, polygona in cross 

 - sections, and surrounded by a rather thin wall ; very narrow, numbering about 

 50 in a space of ro mm. Tabulae numerous 0.18 mm. distant on an average, 

 • nearly straight or slightly concave above. 



Under microscope, the Chinese specimen is quite identical with CJi. 

 .•'tenuissimus from the Middle Devonian of Eifel. The G. I. S. Collection 



.1) Frech.u, Arthaber: JJeber-^das Palaeozoicum in Hocharmenien und Persien, p. 29. 



