Complement to the knowledge of the Haploops species (Crustacea, Gammaridea, Ampeliscidae), with the description of two new species from North Atlantic Ocean. [Contribution to the knowledge of the Haploops genus. 10.].

Two new Haploops species are described from the North Atlantic Ocean: a blind species Haploops faroensis spec. nov. and Haploops truncata spec. nov. with a single pair of corneal lenses. In addition, Haploops vallifera Stephensen 1925 and Haploops similis Stephensen 1925, are re-described and the status of Haploops spinosa Shoemaker 1931, is re-established as a valid species. A table is given of the 75 morphological characters of the studied species.

Two new Haploops species (Crustacea: Gammaridea: Ampeliscidae) from the North Atlantic Ocean: H. bjarnii and H. quebecoisis [Contribution to the knowledge of the Haploops genus. 9.].

Two new Haploops species are described, both from the North Atlantic Ocean: Haploops bjarnii nov. sp. from around the Faeroe Islands and Iceland, and Haploops quebecoisis nov. sp. from the Saint Lawrence Gulf, off Canada. Haploops bjarnii is a species morphologically close to H. islandica Kaim-Malka, Bellan-Santini Dauvin, 2016. These are two blind Haploops species, with long antennae. Haploops quebecoisis is morphologically similar to H. sibirica Gurjanova 1929, both species having 2 pairs of corneal lenses in the same position. A table of the 75 morphological characters is presented that can be used permitting to distinguish the new species from similar species.

On some Haploops species collected in the North Atlantic Ocean with the description of Haploops islandica n. sp. (Crustacea: Gammaridea: Ampeliscidae) [Contribution to the knowledge of the Haploops genus. 8.].

Four Haploops species collected in the North Atlantic Ocean are studied. One of them, H. islandica is a new species for the science. The three other species, H. carinata, H. setosa, H. robusta, were described from a long time, but many confusions exist about these species because their morphological nearness. The four species are described and illustrated in detail, and their distribution around the Iceland is specified. A key of the 23 species known nowadays is given permetting to separate the different species of the Haploops genus.

[Use of three species of crustacea as test animals for the toxicity of two salts of heavy metals]. / Utilisation de trois espèces de Crustacés comme animaux tests de la toxicité de deux sels de métaux lourds

The utilization of marine amphipods Podocerus fulanus and Corophium acherusicum, and the marine isopod Paracerceis sculpta in heavy metal toxicity tests (Cd and Cu) demonstrated on the one hand, the value of these animals as tests subjects when exposed to various polluting agents and, on the other hand their tolerance to heavy metals in acute toxicity tests.