356 MiscellaneoiLS, is very great, and even that in many points the Walrus and the Otarice agree more with Lutra than with the Phocina. But the author cannot find in this an uninterrupted transition from the Ferce, through the Lut7'ina, to the Pinnipediay but shows that, independently of the dentition, the Finnipedia are rather allied to the Bears by other anatomical peculiarities, such as the development of a hooked pro-cess of the lower jaw and the racemose construction of the kidneys. Hence he thinks that the question of the retention or abolition of the Finnipedia as a separate group must depend solely upon indivi-dual opinions which hardly admit of discussion. — Monatsber, der Akad. der Wiss. zu Be?'lin, December 1864, p. 685. Second Note on the Metamorphoses of Marine Crustacea, By M. Z. Gerbe. In a second note on Fhyllosomay M. Gerbe describes the internal anatomy of the Crustaceans composing that supposed genus. The digestive apparatus consists, as in all Crustacea, of a mouth, oesophagus, stomach, and intestine, with peculiar glands attached to the latter ; but the arrangement'of these parts is different from that occurring in the adult, as also in other larvae. The mouth, situated about the posterior third of the cephalic shield, is circumscribed by a languette and a bifid labium, and by two mandibles. These are followed posteriorly by two pairs of maxillae and three pairs of footjaws, placed upon two lateral diverging lines. The appendages representing the first pair of footjaws are reduced to scarcely perceptible tubercles, almost confounded with the base of the second maxillse ; those of the third pair, on the contrary, are greatly developed and furnished with flagelliform appen-dages, and perform the function of natatory feet, which they pre-cisely resemble in organization. The oesophagus is short, cylindrical, and directed obliquely from behind forwards ; it communicates with the front of the stomach by an aperture in the form of an X, formed by a triangular lip moved by two very long and slender muscles, which are attached near the ocular peduncles. This arrangement seems to be peculiar to the Phyllosomes ; nothing of the kind has been observed in the larvae of Cancer, Maia, Forcellana, FalcemoUy &c. In these larvae the oeso-phagus, at its junction with the stomach, only presents a sort of constriction, which dilates and contracts by the action of circular muscles. In all these larvae, moreover, the front of the stomach nearly touches the ocular peduncles, as in the adults, and only occupies a very small portion of the cephalic region. Its general form is that of an almond ; so that it is rather compressed than globular, and presents two unequal extremities, the anterior of which is the larger. In this form its structure is already very complicated, especially in the larvae of Homarus, Forcellana, and FalcBmon. Its double, mus-cular and mucous wall is supported by several cartilaginous pieces of extreme transparency. Two of these, forming the floor, articu-
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