Catalogue Raisonni. 307 



Tr^viranus ; 4. description of the brain^ and of the spinal marrow of a 

 monster by excess, by Tiedemann ; 5. description of three bi-corporate 

 monsters, by Mayer of Bonn ; 6. new observations on the posterior ex- 

 tremities of the serpent, and on the scales of the CtBcilia, by Blayer ; 7- 

 are light and heat developed during the life of plants ? by L. C Trevi- 

 ranus ; 8. action of musk on plants, by Goeppert ; 9. analysis of the milk 

 of women, by Meggenhofen. 



The Edinburgh Journal of Science; conducted by David Brews- 

 ter, LL.D. &c. No. v.— N. S. July 1830. 



The original papers in this number are, 1. Account of steam-engines in 

 Cornwall, by W. J. Henwood ; 2. Experiments on laurel oil ; and ac- 

 count of a curious phenomenon of revolving motions, produced by the 

 combination of alcohol with laurel oil, (Vide p. 302. supra,) by Dr. Han- 

 cock ; 3. Description of a new rain-gage, by M. Adam ; 4. On fossil re- 

 mains in the Velay, (Vide p. 308. infra,) by Dr. Hancock ; 5. On the 

 double chlorides of gold ; by J. F. W. Johnston ; 6. Observations on 

 some passages of Dr. Lardner's treatise on mechanics, by the Rev. W. 

 Whewell; 7. Meteorological observations made at Kendal, by Mr. S. 

 Marshall ; 8. Register of the barometer, thermometer, and i-ain^gage, at 

 Canaan Cottage, near Edinburgh, by A. Adie, Esq. 



Structure et Formation, <^c. Structure and Formation of the 

 Operculum in Gasteropodous Pectinibranchial Mollusca. By M. 

 Ant. Duges. — Ajin. des Set. Nat. Oct. 1829. 



The author divides these opercula into three classes, the cochletform, val. 

 viform, and patelliform. The first (the spiral of De Blainville) belong to 

 to the NattccB ; the second (the toothed and laminated of Bl.) are found iu 

 certain Murices, Fusus, Buccinum undatum, &c. ; the third {concentric 

 or scaly of Bl.) belong to the Paludims. 



According to M. Duges, it is always the collar and not the foot, as has 

 been stated by some writers, which forms and nourishes the operculum ; 

 it is sometimes the whole circumference of the collar, but more frequent- 

 ly its posterior part, which is the organ of production. The columellar 

 l)order, and posterior extremity of the operculum, are consequently the 

 parts where tne increase takes place ; the oldest portions are driven out- 

 wards and forwards, whence result the spiral convolutions of some, and 

 the scaly disposition of others. 



Synopsis of the Organic Remains of the Ferruginous Sand For- 

 mation of the United States, with Geological Remarks. By Sa- 

 muel G. Morton, M.D. of Philadelphia. — American Journal of 

 Science and Arts. No. II. Vol. XVII. 



By most of the geologists of continental Europe, the ferruginous sand, in- 

 cluding iron sand, weald clay, green sand, and chalk marl, is considered 

 as a lower division of the chalk, while in this country it is more gene- 

 rally supposed to be a link in a distinct formation, intermediate between 

 the chalk and the oolites. This formation occupies, in North America, 

 a great part of the triangular peninsula of New Jersey, formed by the 

 Atlantic, and the Delaware and Raritan rivers, and extends across the 

 state of Delaware, from the city of that name to the Chesapeake : ap- 

 pears again near Annapolis in Maryland, at Lynch's Creek in tjouth 

 Carolina, at Cockspur Island in Georgia, and at several places in Ala- 

 bama, Florida, &c. The mineralogical characters, and the mineral con- 

 tents of the American beds, do not appear to present any remarkable dif- 

 erences from similar formations in other countries. Many new shells are, 

 however, enumerated as charaqtenst^c ; among which arie six chambered 

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