Abstract
THE American Naturalist for February, among others, contains an article by Dr. Gill on “The Limits of the Class of Fishes,” in which he endeavours to modify their generally accepted classification by dividing them up into two classes and three sub-classes, of equal significance with the reptiles and birds. The names he proposes are (1) Pisces; (2) Marsipo-branchii; and (3) Leptocardii, which sufficiently indicate the genera he includes in each class. Such an amount of division we think excessive, and it would undoubtedly necessitate the removal of the crocodiles from the reptilia, among other changes. Mr. A. S. Packard gives an account of one of the beaks of a cuttle-fish, probably Architeuthis dux, which is four and a'half inches long; he also describes other colossal specimens. There is a paper by Prof. Jordan on the colours of vegetation, one by Dr. Abbott on the habits of certain crawfish, and another by Dr. Foster on the pottery of the mound-builders, which is fully illustrated.
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