071 the ' Travailleur ' Zoological Exploration. 37 Prostenus luguhris. P. sat obscure uiger, corpore infra pedibusque cbalybeato-violaceis, illo fortiter punctato ; prothorace valde transverse. Long. 5 lin. Hal). Brazil (Morro Velho). Black, rather opaque, body beneath and legs dark violet ; head closely punctured ; prothorax much broader than long, very closely punctured, each puncture with a small white scale at the base ; scutellum cordiform ; elytra minutely seriate-punctate, gradually broader posteriorly ; antennas black, coarsely punctured, the joints only moderately dilated, eighth, ninth, and tenth the most dilated ; femora moderately clavate. In outline and general appearance this species may be ap-proximated to P. periscelis, but, inter alia, is at once distin-guished by its broad prothorax. V. — Summary Report upon a Zoological Exploration made in the Mediterranean and the Atlantic on hoard the ' Travailleur.^ By M. A. Milne-Edwards*. Furnished with every thing necessary for scientific investi-gations, the ' Travailleur ' quitted Rochefort on the 9th June last, and only returned there on the 19th August. During these seventy days of navigation, in which we traversed more than 2000 sea-leagues, we were in harbour only for the time strictly necessary for taking in coals and provisions at Cadiz, Marseilles, Villafranca, Ajaccio, Oran, Tangier, Lisbon, and Ferrol. AH our time was employed in making soundings and dredgings ; but we shall refer in the first place only to those executed in the Mediterranean, afterwards taking up those of the Atlantic. The first methodical investigations made at a considerable depth in the Mediterranean date from 1841, and are due to the naturalist Edward Forbes, who confined them to the vEgean, and did not get below a depth of 300 metres. In 1870 the 'Porcupine' only dredged upon the north coast of Africa ; in 1875 M. Marion, off Marseilles, could not investi-gate the sea beyond 350 metres ; and thus the greatest depths remained almost unexplored ; and it was to their study that we devoted a part of the month of June and the whole of July. * Translated by W. S. Dalla.'^, F.L.S., from the ' Coraptes Rendus/ 28tb November and oth December 1881, pp. 876 and 931.
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