. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 324 DONALD M. MAYNARD .1 mm ARd. FIGURE 5. Anterior ramifications of Ocypode albicans; fresh material. Dorsal exposure with digestive system removed, midline to left. A, medial, posterior branch of anterior rami- fications ; al, musculus adductor lateralis mandibulae; amm, inusculus abductor maior mandibulae (intact) ; apm, apophysis of mandible; AR, anterior ramifications; ARd, anterior ramifications, distal segment; B, anterior, lateral branch of anterior ramifications; li, lateral integumentary nerve; lig, ligament; mdp,
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 324 DONALD M. MAYNARD .1 mm ARd. FIGURE 5. Anterior ramifications of Ocypode albicans; fresh material. Dorsal exposure with digestive system removed, midline to left. A, medial, posterior branch of anterior rami- fications ; al, musculus adductor lateralis mandibulae; amm, inusculus abductor maior mandibulae (intact) ; apm, apophysis of mandible; AR, anterior ramifications; ARd, anterior ramifications, distal segment; B, anterior, lateral branch of anterior ramifications; li, lateral integumentary nerve; lig, ligament; mdp, musculus dorsoventralis posterior; mpllm, musculus promotor II maxillae; pcllm, inusculus proximalis coxopoditis II maxillae; ri, recurrent integumentary nerve; rpllm, musculus respiratorius primus II maxillae; rsllm, musculus respiratorius se- cundus II maxillae; sn 1, first segmental nerve; tapm, stump of tendon of musculus adductor posterior mandibulae. arises from the post-esophageal commissure. Each of these passes dorsally through the posterior esophageal muscles where it is joined by a major branch of a nerve originating in the homolateral circumesophageal ganglion (see also Fig. 5; Heath, 1941). There are a number of smaller branches from these two nerves which innervate the surrounding esophageal muscles (Fig. 6). In view of the observation that in shrimp the post-commissural nerve does not send fibers to these muscles (Knowles, 1953), it seems possible that a similar situation exists in the Brachyura, and that nerve fibers innervating the esophageal muscles are derived from the nerve. 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, Frank Rattray, 1870-1947; Moore
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