. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 183 base of the dactylus. Exopod of first leg slender and tipped with three siibequal denticulate claws and a slender seta; inner seta of basal expansion of fifth legs much shorter than the others. Total length, mm. Male.—A little larger than the female with a narrower urosome; hand of chela on first antenna much longer than wide and only moderately swollen, the dac- tylus simple. Exopod of third legs widened a little but not lengthened, the basal segment scarcely longer than the second segment, the
. Bulletin - United States National Museum. Science. COPEPODS OF THE WOODS HOLE REGION 183 base of the dactylus. Exopod of first leg slender and tipped with three siibequal denticulate claws and a slender seta; inner seta of basal expansion of fifth legs much shorter than the others. Total length, mm. Male.—A little larger than the female with a narrower urosome; hand of chela on first antenna much longer than wide and only moderately swollen, the dac- tylus simple. Exopod of third legs widened a little but not lengthened, the basal segment scarcely longer than the second segment, the distal segment with four long and rather slen- der spines. The spiniform process of the maxilliped chela is slender and more sharply pointed than in the female. The fifth legs are reduced in size but the inner apical seta of the distal segment is as large as the outer, while the basal segment is very small and not at all expanded on the inside, and without setae. Total length, mm. Remarks.—This species can be told by the spiniform proc- ess on the hand of the maxilliped chela, and by the fact that the endo- pod of the first legs only reaches the tip of the basal segment of the exopod. It has never before been reported from American waters. HARPACTICUS GRACILIS Claus FiGtJEB 124 Harpacticus gracilis Claus, Die frei lebenden Copepoclen, p. 135, pi. 19, 1863.— Saes, Crustacea of Norway, vol. 5, p. 52, pi. 30, fig. 1, 1904. Occwrence.—Both sexes obtained in considerable abundance in the Eel Pond, Woods Hole; in two of the brackish ponds on Chap- paquiddick Island; Penzance Pond, Woods Hole; Oak Bluffs Pond, Sengekontacket Pond, and Nashaquitsa Pond, Marthas Vineyard; Great Pond and Waquoit Bay, Falmouth; French Watering Place on Naushon Island; Quissett Pond, Falmouth. Distribution.—British Isles (Boeck, Brady); Kiel Bay (Gies- brecht); Mediterranean (Claus); Norwegian coast (Sars); Adriatic (Grandori, Pesta) ; Gulf of Genoa (Brian).. Figure 123.—Harpacticus t
Size: 1385px × 1804px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
