144 LA TOUCHE : GEOLOGY OF NORTHERN SHAN STATES. 



Australia ; Orthothetes (Strophomena) pecien Linne, ranging in Europe 

 from Llandovery to Wenlock ; Orthis rustica Sowerby, a well-known 

 Wenlock species ; Orthis (Bilobites) biloba Linne, the most common 

 form at this locality, whole slabs of the rock being crowded with them : 

 the species ranges from Bala to Ludlow, and is especially common in 

 the Wenlock shales ; the ubiquitous 0. (Dalmanites) elegantula ; Penta- 

 merus cf. oblongus Sowerby, comparable with the well-known 

 Llandovery form, also occurring in the Niagara (Wenlock) group 

 of America ; and P. (Sieberella) cf. galeatus Dalman, resembling 

 some of the examples from the Wenlock limestone and shale figured 

 by Davidson 1 ; Conchidium cf. biloculare Linne, resembling, though 

 poorly preserved, this Silurian species from Gotland ; Atrypa reti- 

 cularis Linne, a very common Silurian and Devonian species, also 

 known from China, remarkable for its wide vertical range and 

 geographical distribution, and represented here by both internal and 

 external casts ; Spirifer cf. radiatus Sowerby, a common fossil in 

 the Wenlock limestone of Dudley, and Sp. sulcatus Hisinger, a 

 typical Wenlock species ; Glassia cf. compressa Sowerby, also a 

 typical Wenlock and Ludlow form, but the Manaw specimen is 

 identified with much hesitation by Mr. Cowper Reed with Sowerby' s 

 species; Rhynchospira (Homceospira) Baylei (?) Davidson, a common 

 form in the Wenlock limestone, represented by only one external 

 cast ; Nucleospira pisum(l) Sowerby, a characteristic Wenlock species, 

 from which the specimen found at Manaw seems to be indis- 

 tinguishable ; and finally a species of MeristeUa, referred with some 

 hesitation to this genus, and bearing some resemblance to M. 

 Marlareni Haswell, from the Ludlow beds of the Pentland hills, 

 or to M. (Whitficldella) didyma Dalman, which ranges from the 

 Llandovery to Ludlow. 



It will be noticed that not one of the species enumerated above 

 from Kongsha and from Manaw are common 

 Comparison ofKongh- tQ th t localities, except Orthis elegantula; 



sa with Manaw fauna. r 



also that of the 15 species from Manaw no 

 less than 14, either identical or very closely related, are found elsewhere 

 in the Wenlock formation, and that 7 of these are characteristic 

 of that formation ; while, of the 10 species from Konghsa, only 4 

 or 5 are recorded from Wenlock beds, and not one is a typieul 

 form. At, the same time the stratigraphical evidence is entirely 

 against there being any great difference in the relative horizons of 



1 Brit. Foss. Braohiopoda, PI. XV, figs. 17, 18. 



