SILURIAN SYSTEM : UPPER NAMHSIM STAGE. 



143 



point of attachment connected together by somewhat more 



slender dissepiments, thus forming the fenestrules, which are oblong in shape 

 and about twice as long as wide." (Op. cit., p. 95, PI. VI, figs. 1, la.) 



This fossil is very common here, several specimens occuriing on 

 the same slab of rock. The brachiopoda comprise : — Lingula Lewisi (?) 

 Sowerby, a Wenlock and Ludlow form in England ; Strophomena 

 corrugatella Davidson, var., a species which is chiefly Ordovician, 

 though it has been recorded from the Llandovery of Ayrshire. 

 The ornamentation also resembles that of Leptcena (Str.) twbilis 

 McCoy, from the middle Devonian, and of Str. ( ) St-phani Barrande, 

 from Etasje Ff 2 (upper Ludlow) in Bohemia ; Orthis (Platystrophia) 

 hilorata Schlotheim, a species having a very wide range, extending 

 from the Llandeilo to Wenlock beds in Northern Europe ; Orthis 

 (Dalmanites) eleganlula Dalman, a species which also ranges from 

 Ordovician to Silurian, and is common in the Naungkangyi beds. 

 There is also a single lamellibranch, Pterinea fconghsaensis, a new 

 species having a considerable resemblance to Pt. Mans McCoy, 

 from the Aymestry Limestone ; a species of Conularia of which 

 only a single fragment was found, somewhat similar to the Silurian 

 species C. guadrisulcata Sowerby ; and lastly, a new species of tri- 

 lobite, Encrinurus konghsaensis, resembling in some respects E. punc- 

 fatus Briinnich, a well-known Silurian species. This species, as we 

 have seen, has been found at other localities in these beds, as well as 

 in the sandstones below. 



About six miles to the north of this locality, at the crest of 

 „ ., „ the descent to the Namhsim, a mile and a 



Fossils, Manaw. , . . ... 



quarter north of the village ot Manaw, another 

 rich assemblage of fossils was found, in a layer of pinkish, rather 

 coarse-grained sandstone, not more than 6 inches thick, intercalated 

 with somewhat shaly, purple and red sandstone (Loc. 52, E 2). 

 The horizon of the fossiliferous band is probably rather lower in 

 the series than the Konghsa beds, but as the ground for a long 

 distance on either side of the outcrop is covered with surface soil 

 and vegetation, the exact position could not be ascertained. The fossili- 

 ferous band was evidently at one time impregnated with calcareous 

 matter, but this has all been leached out, leaving the rock in a 

 somewhat porous condition, and the fossils are all casts. They 

 include numerous detached rings of crinoid stems, some of large 

 size ; Leptcena rhomboidalis Wilckens, a common and widely ranging 

 Ordovician and Silurian species, known from Europe, America and 



