Venoms; venomous animals and antivenomous serum-therapeutics . Fig. 104.—ScorpcEna diaholiis (Indian and Pacific Oceans). (After Savtschenko.) The frogs alone exhibited, as the result of subcutaneous injec-tion into a limb, slight transient paralysis. No effect was foundto be produced by the venom when injected intravenously intothe rabbit, or subcutaneously into the rat. The poison-apparatus of Scorpcena is situated in the spiny raysof the dorsal and anal fins. These rays are enveloped in the inter-radial membrane, which forms a sheath for them, and are scoredwith a double cannelure. At the b
Venoms; venomous animals and antivenomous serum-therapeutics . Fig. 104.—ScorpcEna diaholiis (Indian and Pacific Oceans). (After Savtschenko.) The frogs alone exhibited, as the result of subcutaneous injec-tion into a limb, slight transient paralysis. No effect was foundto be produced by the venom when injected intravenously intothe rabbit, or subcutaneously into the rat. The poison-apparatus of Scorpcena is situated in the spiny raysof the dorsal and anal fins. These rays are enveloped in the inter-radial membrane, which forms a sheath for them, and are scoredwith a double cannelure. At the bottom of these grooves are the Comptes rendus de la Societe de Biologie, 1904, p. 666. VENOMS IN THE ANIMAL SERIES 295 secreting cells, which are elongate, pressed one against the other,and supported at the base by a highly vascular substratum ofconnective tissue. The venom flows out between the layer of cellsand the ensheathing membrane, which is capable of being pushed. Fig. 105.—Pterois artemata (East Coast of Africa, Indian and Tropical Pacific Oceans), (After Savtschenko.) slightly back as the result of the penetration of the spine into thetissues, and then exerts pressure upon the reservoir. The latter isformed by the distension of the sheath under the pressure of thesecreted liquid. There are twelve pairs of dorsal and three pairs of anal glands. 296 VENOMS The pairs attached to the second anal spine are, as the direct resultof the size of the latter, more developed than those of the otherspines. In the Bascasse, the opercular spines of which are greatlydeveloped, there is a rudiment of a poison-apparatus at the bot-tom of the sheath formed by the skin of the gills. The species of Pterois (fig. 105) are distinguished from those ofScorpccna by their dorsal fins, the rays of which are very long and
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