444 REPORT ON ZOOLOGY, MDCCCXLIY.

half of it grooved with crenulate sulci, from Malacca . (Guerin, Magas, pi.99, 101.)

Recluz gives the Prodromus of a Monograph of the genus Erycina(Rev. Zool. pp. 299, 325.) He refers to it the following eighteen livingspecies: E. Eeshayesii, new species, from New Holland, E. donacina, newspecies, from the Antilles , E. Geoffroyi, Payr., E. corbuloides , Bivona, Borniainflata, Philippi, Kellia suborbicularis, Turton, Eeronia Laperousei, Desh.,E. nucleola , new species, from Cherbourg, E. thracierina, new species, fromCorsica, Montacuta purpurea , Bean, E. seminula, new species, from theMediterranean, E. caroburgensis, new species, from Cherbourg, Montacutabidentata, Turton, Montacuta oblonga, Turton, Montacutaferruginom, Turton,E. Souleyetana, new species, from Brest, M. substriata, Turt., E.francis-cana, new species, the Channel. Besides these, eleven fossil species.

Amphidesma scabrum and zebuense, from the collection of Mr. W. Metcalfe,are described by Hanley (Proceed. Peb. 1844; Annals, xiv, p. 370), both fromZebu Island. Moreover A. carnicolor, by the same, from the Philippines ,from Cuming’s collection.

Corbula decussata, Deshayes (Gudrin, Magas, de Zool. pi. 105): elongated,subequilateral, truncated posteriorly, beak obliquely keeled at the base.Sumatra. C. crispa, Hinds (Proc. 27, Peb.), from the Philippines , C.adusta,id., from New Zealand , G.procera, id., G. c.arnosa, id., without assignedlocality. C. ihecoidea , Jonas (Menke, Zeitsch. p. 185), from New Holland.Twelve species of Corbula (Proceed. 1843, p. 55) are figured in Hinds(Sulphur).

Ckoristodon, Jonas, nov. gen. (Menke, Zeitsch. p. 185), is placed in thefamily of the Lithophaga. Animal ignotum. Testa cardine valvube dextradentibus tribus approximate, sinistra vero duobus et uno intermedioseparabili; lateralibus nullis. Ligamentum externum. Ch. typicum , fromSt. Thomas.

Saxicava Groenlandica, Potiez et Michaud (Gal.): testa ovata, elongata,subcylindracea, transversa, pellucida, longitudinaliter costata, hiante, epider-mide tenuissima, pallescente, latere antico brevi, postico longiore; cardinesubunidentata, intus nitide polita, albida. Greenland .

Thracia oralis and fabula , Philippi (Enum. ii, p. 17), Galeomma ? compres-sum Philippi (ib.)

A Monograph of the genus Myodora, Gray, is given by Lovell Reeve (Proceed, p. 91.) He speaks, however, only of the shells, of which tenspecies are described. They are figured in his Conchologia iconica.

Mittre has given (in Guerin’s Magas, de Zool. pi. 102-104) the anatomyof the animal of Anatina hispida. The mantle is completely closed, excepta small anterior fissure for the passage of the foot, the two siphons areunited, and form an elongated fleshy mass, the orifice is contracted bywarty projections, and anterior to these are placed others, which the author