36 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 135. 
122a Dale (T. Nelson). The Eensselaer grit plateau in New York. 
Abstract : Am. Geol., vol. xiv, pp. 54-55. 
Noticed in Bibliography and Index for 1892 and 1893. 
123 Dall (William Healey). Notes on the Miocene and Pliocene of Gay 
Head, Marthas Vineyard, Mass., and on the "Land Phos- 
phate" of the Ashley River district, South Carolina. 
Am. Jour. Sci., 3d ser., vol. xlviii, pp. 296-301. 
Gives a list of Miocene and Pliocene fossils identified from Gay Head 
and Chilmark, and describes two new species. Reviews the evidences 
of the age of the phosphate rock of the Ashley River district and con- 
cludes that the fauna are of Miocene facies. 
123a Notes on the Atlantic Miocene. 
Abstract: Am. Geol., vol. xiv, p. 202 (£ -p.). 
124 On the species of Mactra from California. 
Nautilus, vol. vii, pp. 136-138. 
Describes three species, including one new species, from the coast of 
California. 
125 and Stanley-Brown (J.). Cenozoic geology along the Apa- 
lachicola River. 
Geol. Soc. Am., Bull., vol. v, pp. 147-170, pi. 3. 
Abstract: Am. Geol., vol. xiii, pp. 137-138 (i p.). 
Describes in detail the geology of the localities studied and the 
geologic structure and succession of the Eocene, Miocene, Pliocene, 
and Pleistocene beds of this region. 
12G Dana (James D.). Observations on the derivation and homologies 
of some articulates. 
Am. Jour. Sci., 3d ser., vol. xlvii, pp. 325-329; Annals and Mag. Nat. 
Hist., vol. xiii, pp. 502-506. 
Discusses the derivation of limaloids, crustaceans, arachnids, myra- 
pods, and insects, and in a table shows the relations in body-segments 
and limbs between these classes. 
127 Darton (Nelson Horatio). Shawangunk Mountain. 
Nat. Geog. Mag., vol. vi, pp. 23-34, pis. 1-3, figs. 1-3. 
Abstracts: Sci. Am. Suppl., vol. xxxvii, pp. 15284-15285; Am. Jour. 
Sci., 3d ser. ; vol. xlvii, p. 482 (7 1.). 
Describes the relations of the Shawangunk grit and the underlying 
Hudson shales and the character and distribution of the lakes, which 
are considered to have been formed by glacial action. 
128 Report on the relations of the Helderberg limestones and 
associated formations in eastern New York. 
N. Y. State Mus., 47th Ann. Rept., pp. 393-422, pis. 1-4, figs. 1-5. 
Describes the physiography of the region studied, presents several 
stratigraphic sections of Upper Silurian strata of central and eastern 
New York, and describes the lithologic character and succession of the 
deposits. 
129 Preliminary report on the geology of Albany County [N. Y.]. 
N. Y. State Mus., 47th Ann. Rept., pp. 425-455, pis. 1-6, figs. 1-9. 
Describes the physiographic features of the county and the litho- 
logic character and stratigraphic relations of the Devonian and Silu- 
rian deposits, and includes notes on the Pleistocene geology. 
