. The Biological bulletin. Biology; Zoology; Marine biology. 274 GERTRUDE W. HINSCH retained. Routine feeding (Mytilns and Spisiila) was initiated, females were marked with insoluble dyes for indi^-idual identification, and their brood chambers were examined periodically. The crabs were observed for reproductive behavior at intervals during most of the day and evening. Observations Ovigerous females were observed from early June until early September. The females are apparently able to produce at least 3-4 consecutive broods during the period studied. In these crabs spermatozoa enclosed in spe
. The Biological bulletin. Biology; Zoology; Marine biology. 274 GERTRUDE W. HINSCH retained. Routine feeding (Mytilns and Spisiila) was initiated, females were marked with insoluble dyes for indi^-idual identification, and their brood chambers were examined periodically. The crabs were observed for reproductive behavior at intervals during most of the day and evening. Observations Ovigerous females were observed from early June until early September. The females are apparently able to produce at least 3-4 consecutive broods during the period studied. In these crabs spermatozoa enclosed in spermatophores are trans- ferred to the seminal receptacle of the female at mating. At the time of oviposition,. ^C^^/ Figure 1. Mating position. Chelae (ch) of the male are bent as he holds the femal (F) in the rostral region and rotates onto his carapace. Abdomens of male Cab-m) and female*' (ab-f) are extended. the eggs pass the seminal receptacle where they can interact with spermatozoa, and are then discharged into the "brood chamber" where the egg mass becomes attached to the pleopods. The last known date of oviposition in this study was September 1. As has been reported by Costello ct al. (1957), the eggs at the time of ovi- position are a bright orange-red in color. The color changes from orange red to; brown as development proceeds in the egg mass. Zoeae were apparent within th' egg chorion a few days prior to hatching. In the case of at least six marked femalesi development to the swimming zoea was completed in 25 days. In nine of thirtee;. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual re
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