The annals and magazine of natural history : zoology, botany, and geology . e edges of the lower valve of the ^Etheria shell onwhich the previously described species is growing. Tiiereare the femains of various other patches of the sponge also onthe lower valve in the region of the hinge and one or twominute sp»)cimens on the upper valve. These patches ofsponge are very inconspicuous, as they run chietly in thefurrows of the siiell ; in the dried state they are soft to thetouch and their surface is even. Scattered over parts of thelower valve of the shell are fpiite a number of gemmulosbelongi
The annals and magazine of natural history : zoology, botany, and geology . e edges of the lower valve of the ^Etheria shell onwhich the previously described species is growing. Tiiereare the femains of various other patches of the sponge also onthe lower valve in the region of the hinge and one or twominute sp»)cimens on the upper valve. These patches ofsponge are very inconspicuous, as they run chietly in thefurrows of the siiell ; in the dried state they are soft to thetouch and their surface is even. Scattered over parts of thelower valve of the shell are fpiite a number of gemmulosbelonging to this 8()ecie8. Each geiumulo is lirmly tixod to A fit. ii: Mug. y. I list. 9. IW. ill. 7 98 Miss J. Stephens on neio the shell by means of the spongin which binds together thecage of inacroscleres in ^^•hich it is enclosed. The skeleton, as far as can be seen, is a rather close net-work of spicules. The spongin could not be made out, and itmust be very scanty in quantity, as the spicules at once fallapart when a small specimen is sectioned by hand. Fig. ?W-:-^i-.^.jfi^ Spongilla {Stratospungilld) henguelensis, sp. n. a, strongyla, X 330 ; b, developing strongyla, X 330 ; c, inicroxea, X COO;d, gemnnile-spicules, X 600; e, gemmule freed from its cage ofniacroscleres, x 60. The gemmule?, as already stated, are firmly fixed to theshell by means of the spongin binding the cage of niacro-scleres which encloses each gemmule. These niacrosclereslie tangentially to the surface of the gemmule, they arestrongly bound together by spongin, and adhere closely toeach other, unlike the rest of the skeleton. The gemmulerests on tlie floor of the cage, and, at least in the dried state,there is a consideiable space between the sides and roof of thecage and the gemmule. Similar cages of niacroscleres have]<een described in other species—for example, in Spongillacvtherice, Annandale, Corvospongilla hurmanica (Kirk-patrick), Corvospongilla lapidosa (Annandale), and Corvo-spo
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Keywords: ., bookcentury1800, bookidser9annalsmaga, booksubjectnaturalhistory
