. Bulletin - United States National Museum. Science. MONOGEAPH OF THE EXISTING CRINOIDS. 75 Chiasma.—The figure formed by the division of the dorsal nerve trunks within the axillaries (fig. 62, p. 89). Immediately upon entering the axillary the nerve cord divides into two parts which run each to the center of one of the two distal articular faces. A trans- verse connective unites these two branches just before they emerge from the distal faces of the axillary. Shortly after the branchmg of the primary nerve cord a small branch is given off from the inner side of each derivative; these two bran
. Bulletin - United States National Museum. Science. MONOGEAPH OF THE EXISTING CRINOIDS. 75 Chiasma.—The figure formed by the division of the dorsal nerve trunks within the axillaries (fig. 62, p. 89). Immediately upon entering the axillary the nerve cord divides into two parts which run each to the center of one of the two distal articular faces. A trans- verse connective unites these two branches just before they emerge from the distal faces of the axillary. Shortly after the branchmg of the primary nerve cord a small branch is given off from the inner side of each derivative; these two branches run obliquely outward, distally crossing each other and immedi- ately merging with the transverse connective. Fig. 36. Fig. 37. Fig. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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