328 Scientific Memoranda. 



many years been arduously engaged in examinations of the 

 Cambrian system, including the old formations of Westmoreland 

 and Lancashire: also the lower beds in Devonshire and Corn- 

 wall, together with their systems. Last year he completed the 

 survey of the Cheviots on the Scotch border, and as soon as his 

 examinations of the principality of Wales are terminated in the 

 course of the next summer, the results comprehended in these 

 elaborate investigations will be given to the public in the con- 

 cluding volume of " Outlines of the Geology of England and 

 Wales." 



If a revised edition of the first volume were published at the 

 same time, giving it the advantages of the second, by extending 

 to it the appropriate geological information, produced since the 

 first volume was written, this would be a standard work for fu- 

 ture geological writers in every country. It would be a vain 

 thing to expect that two individuals (both clergymen of the 

 church of England,) more learned, more diligent, and more ac- 

 curate than Messrs. Conybeare and Sedgewick, could ever unite 

 their labours upon any subject connected with the physical 

 sciences. Editor. 



Professor Rafinesque. — This indefatigable and veteran natural- 

 ist has just published " A continuation of a Monograph of the 

 Bivalve Shells of the River Ohio, and other Rivers of the West- 

 ern States," containing 30 new genera, and 47 new species, 

 with " A Supplement on the Fossil Bivalve Shells of the Western 

 Region." They are offered for sale. The professor observes, 

 " Some of these shells are so very rare, that I have only met 

 them once in 4000 miles of travels and explorations; others 

 I have never seen except in collections, such are the unio ridi- 

 hundiis, and the alasmodon complanattim, for instance. I shall 

 describe here, only those which / have now before my eyes, and 

 with the names given them ten years ago, at their discovery." 

 He accuses by name, some of the modern conchoiogists on this 

 side the water, of systematically excluding his discoveries, for 

 the selfish pleasure of naming them over again; and of one of 

 these gentlemen, he remarks, " I had respectfully noticed, in 

 1820, his previous labours; but he has never mentioned mine, 

 and knows so little of the animals of these shells, as to have mis- 

 taken their mouth for their tail." Of the testaceous animadver- 



