﻿Vol. 64.] GEOLOGY OF BURMA. 615 



and 24th mile-posts, the crushing of beds containing much carbon- 

 aceous matter (and frequently coal) appears to have given rise to 

 natural-gas springs and other indications of volatile bituminous 

 matter, although this may be derived from bituminous beds like 

 those found in the Miocene of other parts of Burma. The Letpan 

 choung marks the axis of an unimportant anticline, the flanks of 

 which dip steeply away one from the other, the beds in many 

 places being vertical. Along the stream northwards, away from 

 the road, the dips are less steep ; and, from near the crest, the 

 following fossils were obtained from the shales and from a bed of 

 sandstone interstratified with them : — 



Paracyathu6 caruleus, Dune. 

 Area sp. 



Cardita protovariegata, Noetl. 

 Tellina sp. 



Natica (Qlohularia) gibberosa, 



Grat. 

 Cyprcea elegans, Defr. 

 Busy con canaliculatmn (Linn.), 

 Comes avaenSis, Noetl. 



xllso a species (apparently) of Glycimeris, akin to that found in 

 the Eocene (p. 612) ; and a Cassis poorly preserved, but similar in, 

 size and shape to a form assigned by Dr. K. Martin to C. cornuta, 

 Linn., and found in the Miocene of Java. Only three of these 

 species have hitherto been described from Burma, and of these two 

 occur in the zone^ of Meiocardia metavulgaris, IS'oetl., at Singu, so. 

 that the horizon may be equivalent. 



From an unknown locality, some 3 or 4 miles down stream from 

 the foregoing, were brought specimens of Batissa kodoungensis,^ 

 I^oetl., which supply fuller knowledge of the species, only known 

 to Dr. Noetling by fragments from Yenangyoung. The choung 

 here flows along the strike of the beds. 



Passing from these localities by Kyaukswe (long. 94° 15' E.^ lat. 

 21° 10' N.) and Kyinhlein (94° 15' E., 21° 15' F.), the latter at 

 the junction of the Saw and Yaw rivers, to Pasok (94° 14' E., 

 21° 20' N.), further evidence was obtained of great disturbance in 

 the Miocene strata of this region ; this was especially noticed on 

 the right bank of the Yaw below Pasok, while near Kyinhlein 

 plant-remains were found in the shales and sandstones of the same 

 series. 



Crossing the Yaw, the Miocene deposits, apparently now hori- 

 zontal, were traversed to the village of Man (long, 94° 19' E.. 

 lat. 21° 20' N.) ; beyond this Pliocene was again met with, followed 

 in a range of low hills by Miocene, the latter having yielded near 

 Man village Paracyathus cceruleus^ Dune, Ceinthium (?J sp., with 

 two species of Conus and a lamellibranch probably belonging to the 

 Veneridse. 



A rapid traverse across the Pliocene valley of the Yaw brings,. 

 us to the Yenangyat anticline already described by Grimes and 

 others. On this fold, at a point near the crest some 10 miles north 

 of Yenangyat, was obtained Melongena pseud ohucepJiala (Noetl.) ; 



^ F. Noetling, Palncontologia Indica (Mem. Geol. Surv. India) vol i no 3 

 (1901) p. 32. 



