Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: LIST OF SPECIES 7 Since the period of deposition, the rocks of the Santa Ynez range have undergone some folding, leaving the strata of diatoms nowhere horizontal. The Xyne layer stands where examined by us at an angle of about thirty degrees, the north side highest. From the natural history view, this stratum is the most remarkable feature of the deposit. At about 950 feet from the bottom, at a certain horizon everywhere the same, is a layer of an extinct herring, described by us in a previous paper as Xyne Grex. Individuals lie on the bottom wherever this layer has been exposed. They are all of about the same size, about six inches long, all adult and nowhere mixed with any other fish. Apparently the species swarmed in the bay for spawning purposes, and the entire mass was heated, suffocated, or otherwise killed in an instant and with no evidence of agony or distortion. In the rocks above, occasional examples are found, always as imprints, while those of the main mass have been mostly carbonized and left black or nearly so. The other fishes found in these deposits mainly occur in the upper strata. Only large fishes, a foot or more?herrings ex- cepted?are found here, these being mainly mackerel, flounders, bass, rock-fish and the like, which were apparently in pursuit of the herring. All of these are described and figured in the pages which follow. This Lompoc fauna contrasts strongly with that described from the impure diatomaceous shales at El Modena and Bairdstown?of the same age, but evidently under different conditions. All the fishes of these deposits are immature, evidently residents of shallow bays within the archipelago which now forms the counties of Los Angeles and Orange. The species thus far found at Lompoc are the following (new names in italics): Fam...