. Bulletin - United States National Museum. Science. 518 BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM Color.—Cephalothorax reddish or blackish from contents of di- gestive tube; trunk transparent cartilage color; oviduct and eggs white and opaque, the latter becoming orange with development. Female.—Cephalothorax three to five times as long as the trunk; head not enlarged, covered with a carapace; neck covered with fine transverse wrinkles for two-thirds of its length behind the head. Trunk kidney-shaped, twice as wide as long, flattened on its dorsal surface; ovisacs also kidney-shaped,
. Bulletin - United States National Museum. Science. 518 BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM Color.—Cephalothorax reddish or blackish from contents of di- gestive tube; trunk transparent cartilage color; oviduct and eggs white and opaque, the latter becoming orange with development. Female.—Cephalothorax three to five times as long as the trunk; head not enlarged, covered with a carapace; neck covered with fine transverse wrinkles for two-thirds of its length behind the head. Trunk kidney-shaped, twice as wide as long, flattened on its dorsal surface; ovisacs also kidney-shaped, attached by the center of one side at an angle of 45° to the trunk axis. First antennae 3-seg- mented, armed with stout ensiform spines; second antennae bira- mose, the exopod smaller than the endopod; first maxillae tripartite; sec- ond maxillae apparently attached to the trunk in the sinus of the kidney on the anterior margin. Length of cephalothorax, mm.; of trunk, mm. Male. — Body ovoid; pointed anteriorly, the appendages attached to the ventral surface; head with dorsal carapace; genital process behind the month parts; first antennae 3-segmented and pointed forward; mouth parts like those of the female, ex- cept that the terminal claw of the maxillipeds has a row of minute teeth along its inner margin. Total length, mm. Remarks.—This species can be identified by the shape and mode of attachment of the ovisacs and by the profusely wrinkled Figure 306.—Clavellisa spinosa: a. Female—head, ventral; trunk, dorsal; bj male, lateral CLAVELLISA CORDATA Wilson Figure 307 Clavellisa cordata Wilson, Proc. U. S. Nat. Miis., vol. 47, p. 697, pis. 26, 50, 52, 1915. Occv/rrence.—Both sexes were taken from the gills of the hickory shad {Pomolohus mediocHs) and from the gills of the alewife {Po- molohus pseudoharengus), captured at Woods Hole by V. N. Ed- wards in October, 1903. Distribution.—Not found outside the present area. Color.—Body a unif
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
