. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 167 PAd CVC. 168 Fig. 164.—Cross section through a pallial sense organ. X 575. Fixed in Gilson fluid and stained with Delaneld hematoxylin. Cu, cuticula; ICt inner cilia; N, nerve supplying the sense organ; OC, outer cilia. Fig. 165.—Cross section of anal epithelium. X Preparation same as fig. 164- BBC, basal bodies of cilia; C, cilia PgG, pigment granules. Fig. 166.—Transverse section through eye of young mussel 15 mm. long. X soo. Fixed in Flemming fluid and stained with Heidenh
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 167 PAd CVC. 168 Fig. 164.—Cross section through a pallial sense organ. X 575. Fixed in Gilson fluid and stained with Delaneld hematoxylin. Cu, cuticula; ICt inner cilia; N, nerve supplying the sense organ; OC, outer cilia. Fig. 165.—Cross section of anal epithelium. X Preparation same as fig. 164- BBC, basal bodies of cilia; C, cilia PgG, pigment granules. Fig. 166.—Transverse section through eye of young mussel 15 mm. long. X soo. Fixed in Flemming fluid and stained with Heidenhain iron haematoxylin and congo red. Ln, so-called lens; OpN, optic nerve; PEp, pigmented epithelium of eye cup. Fig. 167.—Cross section through body epithelium containing two pinsehellen of Flemming. X 1,000. Preparation same as fig. 166. CEp, ciliated epithelium, Pn, pinselzellen of Flemming. Fig. 168.—Lateral view of anterior end of gills with superior palp reflected to show position of eye at base of first filament of inner gill lamella. By, byssus; DP, descending portion of outer gill lamella, E, eye; Ft. foot; IG, inner gill lamella; IP, inferior palp; M, mantle; Mth, position of mouth; OG, outer gill lamella; SP, superior palp. (Alter Pelseneer, 1899.) Fig. 169.—Cross section passing through posterior adductor muscle to show positionsof abdominal senseorgan and osphradium in relation to roots of gill. X 50. Preparation same as fig. 166. ASO, abdominal sense organ; Br, gill; CVC, cerebrovisceral commissure; M, mantle, OS. osphradium; PAd, posterior adductor muscle. 178. 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 Fish Commission. Washington, The Commission, Govt. Print. Off
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