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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1851 Excerpt: ...a notch on the dorsal margin, and the basal articulations of the cirri stand some little way above it. The basal edge of the large, well-developed mouth can be traced all round, and on the ventral margin (b), is generally marked by a slight notch. The dimensions and proportions vary much: the longest specimen, including the imbedded portion, was th, and the shortest barely ths of an inch in length; the width of the widest portion varied from ths of an inch: the specimen figured (PI. IV, fig. 8a, and PL V, fig. 1, ) is a broad, short individuaI. Generally, the middle of the peduncle is rather wider than the upper part. I am deeply indebted to the liberality and kindness of Mr. Cuming, in allowing me to cut up four specimens of this new species; and to Dr. Gould, of.Boston, U. S., for the examination of the Burmese specimens. Peduncle--The main part of the animal, as may be seen in the drawing, consists of the peduncle, of which the imbedded portion tapers more or less suddenly in a very variable manner, and is of variable length, --in one specimen being one fourth of the entire length, and in another consisting of a mere minute blunt point. The free upper part of the animal is bent in various directions, in relation to the imbedded portion. The latter passes obliquely through the chitine membrane and corium, lining the sack of the female, and running along amidst the under-lying muscles and inosculating fibrous tissue, is attached to them by cement at the extremity. The peduncle is often, but not in the individual represented, much constricted at the point where it passes through the skin of the female, and generally at several other points, especially towards the extremity (see fig. 1); the stages of its deeper and deeper imbedment being thus marked. The cons.

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