. The Canadian field-naturalist. Fig. 4. Argulus piperatus: maxillijied of male: much enlarged. The maxillipeds are rather short but stout; the triangular plate on their base is wide posteriorly and much narrowed anteriorly, but extends to the anterior margin of the appendage; the teeth are long and wide and bluntly rounded. Inside of the base of the appendage, on the ventral surface of the head, is an accessory tooth of the same pattern as those on the plate itself. The rami of the swimming legs reach consider- ably beyond the margin of the carapace. The lobes en the basal joints of the fourt
. The Canadian field-naturalist. Fig. 4. Argulus piperatus: maxillijied of male: much enlarged. The maxillipeds are rather short but stout; the triangular plate on their base is wide posteriorly and much narrowed anteriorly, but extends to the anterior margin of the appendage; the teeth are long and wide and bluntly rounded. Inside of the base of the appendage, on the ventral surface of the head, is an accessory tooth of the same pattern as those on the plate itself. The rami of the swimming legs reach consider- ably beyond the margin of the carapace. The lobes en the basal joints of the fourth legs are small and not very prominent. Color a light cartilage gray, the dorsal surface covered with small black dots, as though it had been sprinkled with pepper. These dots are not evenly distributed but are massed as shown in the figure. , Total length 5 mm. Carapace 4 mm. long, mm. wide. Abdomen 1 mm. long, mm. Fig. 'i. Dorsal view of Argulus piperatus. male. The line represents a length of 1 mm. Specific characters of male. Carapace relative- ly the same size and shape as in the female; abdo- men longer, one-third the length of the carapace, the longitudinal and transverse diameters in the proportion of 15 to 11. Anal sinus not as deep, only 14' , of the length of the abdomen and never closed by the approximation of the posterior 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 Ottawa Field-Naturalists' Club. Ottawa, The Ottawa-Field-Naturalists Club
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Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1920, bookyear1920
