. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL DEVELOPMENT OF PACHYCHELES 137. FIGURE 2. The zoeal and megalopal stages of Pachycheles monilifer (Dana) ; A, First zoea; B, Second zoea; C, Megalopa; c, Detail, megalopal frontal region; D, Telson, first zoea; E, Telson, second zoea; F, Maxilliped 3 and pereiopods, late stage first zoea; G, Same, late stage second zoea. Scale lines equal a total of and mm according to divisions. Maxilliped 2: (Fig. 3, G). Coxopodite naked; basipodite setae 1, 2; endo- podite setae 2, 2, 1 -f 2, 5 + I; setules dorsally on segm
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL DEVELOPMENT OF PACHYCHELES 137. FIGURE 2. The zoeal and megalopal stages of Pachycheles monilifer (Dana) ; A, First zoea; B, Second zoea; C, Megalopa; c, Detail, megalopal frontal region; D, Telson, first zoea; E, Telson, second zoea; F, Maxilliped 3 and pereiopods, late stage first zoea; G, Same, late stage second zoea. Scale lines equal a total of and mm according to divisions. Maxilliped 2: (Fig. 3, G). Coxopodite naked; basipodite setae 1, 2; endo- podite setae 2, 2, 1 -f 2, 5 + I; setules dorsally on segments as shown; exopodite as above. 3 and pereiopods: (Fig. 3, H). Small, amorphous buds; gill buds present in late stage; bud of future maxilliped endopodite elongate but without segmentation; no setae present during stage but may be extruded just prior to subsequent molt (Fig. 2, F). Abdomen: (Fig. 2, A). Lateral spines present on somites 3, 4, 5, increasing in size posteriorly; dorsal posterior margin of above somites armed with series of minute teeth or spinules; pleopod buds visible only as primordia in late stage. Telson: (Fig. 2, D). Fifth pair of plumose setae on central prominence of telson; setae 1 and 2 armed with distinct hook-like spinules at tips (detail), re- maining setae appear serrate but without spines; large lateral spines of telson smooth; anal spine present. Color: Rostrum and posterior carapace spines diffusely orange, all somites of abdomen with at least one red-orange chromatophore dorsally and ventrally, two ventrally on somites 1 and 5; when chromatophores are expanded entire abdomen. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Fran
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
