. The Canadian field-naturalist. 150 The Canadian Field-Naturalist [Vol. Fig. 2. Argulus piperatus: first and second antennae of male, mucli enlarged. Lateral claw of basal joint of first antenna long and slender and curved into a half circle; anterior claw shcrt and weak. Second joint slender, three times the length of the terminal joint, and armed at the distal anterior corner with a short spine; ter- minal joint tipped with two spines. Second anten- na of the usual pattern, the basal joint one-half wider than the succeeding joints and tipped with a long spine; second joint with two
. The Canadian field-naturalist. 150 The Canadian Field-Naturalist [Vol. Fig. 2. Argulus piperatus: first and second antennae of male, mucli enlarged. Lateral claw of basal joint of first antenna long and slender and curved into a half circle; anterior claw shcrt and weak. Second joint slender, three times the length of the terminal joint, and armed at the distal anterior corner with a short spine; ter- minal joint tipped with two spines. Second anten- na of the usual pattern, the basal joint one-half wider than the succeeding joints and tipped with a long spine; second joint with two spmes, third and fourth joints with one spine 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
Size: 1768px × 1413px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1920, bookyear1920
