204

REPORT ON ZOOLOGY, MDCCCXLIII.

Munchen , 1843. (Development of the Ovum of the Lob-ster, from the first changes in the Vitellus, up to thematurity of the Embryo. Munich , &c.)

Besides the exposition of the gradual formation of the embryo, the author,in conclusion, also gives a summary view of the varieties which occur in thisrespect in Carcinas memos and in the River Crayfish, which were also subjectedto observation. In Carcinas mamas the eyes are considerably larger, theliver is completed at an earlier period, but the feet and oral members at alater. In the River Crayfish the eyes are smaller than in the Lobster, althoughthe ovum is larger; on the other hand, the antennae are developed to agreater length at an early period, and the caudal feet are already observablein the early stages. In the Lobster the tail is developed earlier than in theRiver Crayfish.

Braciiyttra. —The following species, in the various families of the bra-chyurous Crabs, have been instituted as new by Krauss (1. c.): Platyonychusrugulosus, JEgle (De Haan) Rupellii; Xantho De Haanii, 'a-dentatus ; Galene(De Iiaan) natalensis ; Pilumnus xanthoides ; Menippe Martensii ; Telpkusadepressa; Sesarma longipes; Acanthonyx Mac Leayi, Xdentatus; Pisa fascicu-laris.

Besides these, two new species have been described by White: Portunuscatharus, resembling the European P. marmoreus , though broader, and withfour teeth on the frontal margin, from New Zealand (Dieffen. Trav. ii, p. 265),and Atelecyclus spimdosus, from the Falkland. Islands, nearly allied to theChilian A. chilensis, Edw. (Ann. Nat. Hist, xii, p. 345.)

On a peculiar structure of the branchi® in the Land Crabs some remarkswere made by J. Muller in the Society of Naturalists at Berlin. Thebranchi* have, in these, stiff processes between the lamellae, whichprevent their sticking together, and the want only of which appears to befatal to fish out of water. (Eroriep’s N. Notiz, 28 Bd. p. 265.)

Anomura. — Pagunis virescens, and also Porcettana natalensis and BeHaanii are new species by Krauss (1. c.), from the coast of Natal; both thelatter inhabit the Madrepore banks.

Astacini. —Krauss (1. c.) caught abundantly, in Table Bay, a Gebia ,which, from the figure in the ‘ Fauna Japonioa,’ he determines to be G. major ,De Haan, but on account of some differences he describes it as var. capensis.More accurate comparison will probably show it to be a distinct species.

Carides. —A number of new species from the coasts of Norway havebeen instituted and accurately described by Rathke (Verhandl. d. Kais.Leop. Acad. d. Wiss. xii, p. 6-18) : Palcemon Pabricii, Ilippolyte subula ,vittata (pusiola , Krog), recurvirostris, Lovenii (mutila, Kr.), lentiginosa(Gaimardii, Kr.), Retzii, Pandalus hrevirostris. Additional remarks aregiven in these Archives, 1814, i, p. 258-9.