3. The coast-line of the _Chilian district_ extends over 20 degrees of latitude only, and is nearly straight. In its northern and warmer parts it is of a very uniform character, and exposed to high and irregular tides, and to remarkable and sudden changes of the levels of land and water, which must seriously interfere with fishes living and propagating near the shore. No river of considerable size interrupts the monotony of the physical conditions, to offer an additional element in favour of the development of littoral animals. In the southern parts, where the coast is lined with archipelagoes, the climate is too severe for the majority of fishes. All these conditions combine to render this district comparatively poor as regards variety of Shore fishes, as will be seen from the following list:-- *Callorhynchus; Scyllium, Acanthias, Spinax; Urolophus. Serranus, Plectropoma, Polyprion, Pristipoma, Erythrichthys; *Haplodactylus; *Scorpis; Chilodactylus, **Mendosoma; Sebastes, *Agriopus; Trigla, Agonus; *Aphritis, *Eleginus, Pinguipes, Latilus, Notothenia (1 sp.) Umbrina; Thyrsites; Trachurus, Caranx, *Seriolella; Porichthys; **Myxodes, Clinus; Sicyases, Gobiesox. Heliastes; **Malacopterus; *Labrichthys. Merluccius; *Genypterus; Pseudorhombus. Engraulis, Clupea; Ophichthys, Muræna. Syngnathus.--*Bdellostoma. Of these genera six only are not found in other districts of this zone. Three are peculiar to the Chilian district; _Porichthys_ and _Agonus_ have penetrated so far southwards from the Peruvian and Californian districts; and _Polyprion_ is one of those extraordinary instances in which a very specialised form occurs at almost opposite points of the globe, without having left a trace of its previous existence in, or of its passage through, the intermediate space. 4. The _Patagonian district_ is, with the exception of the neighbourhood of the mouth of the Rio de la Plata, almost unknown. In that estuary occur _Mustelus vulgaris_, two _Raja_, two _Trygon_, several Sciænoids, _Paropsis signata_ and _Percophis brasilianus_ (two fishes peculiar to this coast), _Prionotus punctatus_, _Læmonema longifilis_ (a Gadoid), a _Pseudorhombus_, two Soles, _Engraulis olidus_, a _Syngnathus_, _Conger vulgaris_, and _Ophichthys ocellatus_; and if we notice the occurrence of a _Serranus_ and _Caranx_, of _Aphritis_ and _Pinguipes_, and of two or three _Clupea_, we shall have enumerated all that is known of this fauna. The fishes of the southern part, viz. the coast of Patagonia proper, southwards to Magelhæn’s Straits, are unknown; which is the more to be regretted, as it is most probably the part in which the characteristic types of this district are most developed. V.--SHORE FISHES OF THE ANTARCTIC OCEAN.