Geology and Mineralogy. 79 



general thing, on the existence of an anticline in the subjacent 

 rocks. 



7. New Lower Silurian Lamellibranchiata, chiefly from Min- 

 nesota rocks • E. O. Uluich. From the Nineteenth Ann. Rept. 

 Geol. and Nat. Hist. Surv. of Minnesota, March, 1892. — Thirty- 

 new species are added to the known fauna of these rocks. They 

 are referred mainly to the genera Tellinomya, Modiolopsis, and 

 Cypricardites. A new genus, Plethocardia, is proposed for two 

 species related to the Gyrtodonta cordiformis of Billings. The 

 author recognizes the confusion existing among the genera of 

 Silurian lamellibranchs and his references are therefore somewhat 

 provisional. c. e. b. 



8. Der Peloponnes, Versuch einer Landeskunde auf geolo- 

 gischer Grundlage, nach Ergebnissen einiger Reisen von Dr. 

 Alfred Philippson. pp. 27*3-642, 8vo. Berlin, 1892 (R. Fried- 

 lander & Sohn). — This volume is the concluding Part II of the 

 valuable work on the Peloponnesus noticed in vol. xlii of this 

 Journal (page 173). It continues the topographic description of 

 the country, and then treats of the geological structure, climate, 

 vegetation, fauna, and other topics of general interest. The 

 illustrations include maps and sections and a series, of four large 

 colored topographic maps, which are both hypsometric and 

 bathymetric. 



9. Chiastolite in fossiliferous metamorphic slates of Portugal. 

 — In an Upper Silurian slate of the Province of Minho, near Val- 

 longo, Portugal, J. F. N. Delgado has found along with Grap- 

 tolites, multitudes of small crystals of chiastolite. Further, a 

 Lower Silurian slate of Serra de Marao, containing a specimen of 

 the trilobite Illainus Lusitanicus with portions of its test silici- 

 fied, and a cast of a Redonia (probably R. Duvaliano, Rou.), 

 contains crystals of chiastolite in the rock and also in the casts of 

 the fossils. Kjerulf has described a similar case from near Ekern, 

 in the inferior part of the Lower Silurian, where the rock, which 

 is profoundly altered, contains large numbers of chiastolite crys- 

 tals along side of the graptolites. 



10. Striated Garnet from JBuckfield, Maine / by W. S. Batlet 

 (communicated). — In glancing over the literature of garnets in 

 Hintze's Handbuch der Mineralogie so few were the notices of 

 striated garnets met with, that it is thought worth while to men- 

 tion the existence of good examples of them in large numbers at 

 Buckfield, Oxford Co., Maine. Unfortunately but one specimen 

 from this locality remains in the writer's possession, but this is so 

 similar in appearance to others obtained from the same place that 

 its description will serve as a description of nearly all found 

 there. The crystal to which reference is made is an icositetra- 

 hedron (211) about two inches in diameter, modified by small 

 faces of the dodecahedron (110). All the planes are deeply 

 striated parallel to the combination edge, 211 : 110, and these 

 striations are so deep in the icositetrahedral faces that the reflec- 

 tions of the dodecahedron may easily be obtained from them. In 



