LETTER OE TRANSMITTAL. F\ XV 



plicated by the rock folds, which, however, have distorted 

 and broken the fossils. 



The transition Chemung -CatsTx ill strata which may be 

 regarded by some as at the top of No. VIII, and by others 

 as at the bottom of No. IX, contain numerous lamelli- 

 branchs, while the brachiopods become fewer in proportion. 

 The beds containing these fossils, so far as their true posi- 

 tion can be determined, lie high up in the series, and above 

 red beds of shale containing the well known Catskill fish 

 Holoptgcltius and Bothriolepis, if these be really distinct. 

 Prof. Claypole has arranged a list of such fossils as occur 

 above the fish-bed and up to the horizon where in his dis- 

 trict he found the last traces of a Chemung type. "Many 

 hundred feet of shale and sandstone, mostly red, here oc- 

 cur, some containing fish-scales and other Chemung fossils, 

 until the great red mass of the Catskill proper is reached, 

 which here, as elsewhere, is almost barren of remains of 

 animal life : " — Spirifera mesostr talis, Sjiir if era disjuncta ; 

 Sanguinolites'undatus, Goniophora chemungensis, Modi- 

 ola metella, Scliizodus oblatus, Sc7iizodus chemungensis f 

 Schizodus rhombeus, Lyriopecten priamus, Actinoptera 

 zeta, Cardiomorpha rotunda; Belter ophon maera (var.); 

 Hoi opt gel tius americanus, Bothriolepis taylori. "Other 

 undescribed forms also occur in these beds ; and it is 

 worthy of remark that many of the identified fossils show 

 some variation from their figures and descriptions, probably 

 the result of conditions of life for the most part unfavor- 

 able. '' 



From the Catskill formation No. IX nothing has been 

 obtained but a few plant remains. 



From the Pocono formation No. X only a few drifted 

 logs of Lepidodendron were seen. 



In the Mauch Cltuiik formation No. XI no trace of or- 

 ganic life was noticed. 



In the Second Part of Prof. Claypole' s report he will 

 present the evidence which the several localities have fur- 

 nished for the correctness of his conclusions, in greater de- 

 tail, and with illustrations of the fossils which are not yet 

 sufficiently prepared for publication. Meanwhile the First 



