Report on the scientific results of the voyage of Challenger during the years 1873-76 : under the command of Captain George S Nares, , and Captain Frank Turle Thomson, . ilQ. i>.—Myaionemato:ceres, Wyville Thomson. Upper (afterW. Th.) surface, natural size. Fig. -Hyahmema toxeres, Wyville Thomson. Lower (afterW. Th.) surface of the sponge, natural size. like a bow or boomerang. These spicules are distributed in all parts of the sponge, andare particularly abundant near the insertion of the coil. No analogous form occurs inthe other species of Hyalonema. The large am
Report on the scientific results of the voyage of Challenger during the years 1873-76 : under the command of Captain George S Nares, , and Captain Frank Turle Thomson, . ilQ. i>.—Myaionemato:ceres, Wyville Thomson. Upper (afterW. Th.) surface, natural size. Fig. -Hyahmema toxeres, Wyville Thomson. Lower (afterW. Th.) surface of the sponge, natural size. like a bow or boomerang. These spicules are distributed in all parts of the sponge, andare particularly abundant near the insertion of the coil. No analogous form occurs inthe other species of Hyalonema. The large amphidiscs are much larger than in any other known sponge. They areupwards of half a millimetre in length and visible to the naked eye, twice as large as inHyalonema lusitanicum. The feathered shafts of the five-rayed sj^icules which fringethe openings are longer than in the other species, and the rays of the cross are muchshorter (fig. 7). The second specimen of the sponge body agreed with the one described in all EEPOKT ON THE HEXACTINELLIDA. 203 essential points of structure, but was more conical in form. The young specimendiffered from the young of Ilyalonema lusitanicum at the s
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscienti, bookyear1887
