. Annual report. New York State Museum; Science; Science. 222 NEW YORK STATE MUSEUM SPONGE SPICULES From camera drawings by the author PLATE A. Ancistroid spicules I A normal and abundant form, doubly hooked at the lower axial extremity, singly knobbed at the upper, the lateral arms represented by a circlet of four up-curved and knobbed rays surrounding the upper terminus of the main axis. 2 A departure from the same structure in the form of the hook which is simple with a pair of lateral outgrowths. 3 A barbed trident. 4. 5 Two-hooked grapnels without evidence of lateral arms. 6 A "cod-h
. Annual report. New York State Museum; Science; Science. 222 NEW YORK STATE MUSEUM SPONGE SPICULES From camera drawings by the author PLATE A. Ancistroid spicules I A normal and abundant form, doubly hooked at the lower axial extremity, singly knobbed at the upper, the lateral arms represented by a circlet of four up-curved and knobbed rays surrounding the upper terminus of the main axis. 2 A departure from the same structure in the form of the hook which is simple with a pair of lateral outgrowths. 3 A barbed trident. 4. 5 Two-hooked grapnels without evidence of lateral arms. 6 A "; 7 Of the type of i. 8 Of the type of 4 and 5. 9 A smooth trident. 10 Trident with long shaft and gracefully recurved hooks. 11 A deeply divided two-hook grapnel with long shaft bearing traces of other arms. 12 Of the type of 2 with more complete development of the primary hook. 13 An anchor with curved shaft and widely divergent hooks. 14 Of the type of 2 and 12 but with four accessory hooks superposed on the primary hook. 15 A barbed trident as Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
