. Bulletin - United States National Museum. Science. 449.âP:richsoxella filiformis (After Harger). ,â 5. Localities.âGreat Egg Harbor, New Jersey; Long Island Sound; Vineyard Sound, Massachusetts; Puntarasa, Florida; Nantucket Sound; Thimble Islands; Fisher's Island Sound; Noank, Connecticut; the Bahamas. Depth.â\\ to IS fathoms, in sand and gravel, algte, etc.; low water. Body oblong-ovate, nearly three times as long as wide, 3 nun. : 8 mm. Length of abdomen equal to a lit- tle more than one-third the length of the entire body, being 3 nun. long. Head with front deepl}' excavate be- tween the
. Bulletin - United States National Museum. Science. 449.âP:richsoxella filiformis (After Harger). ,â 5. Localities.âGreat Egg Harbor, New Jersey; Long Island Sound; Vineyard Sound, Massachusetts; Puntarasa, Florida; Nantucket Sound; Thimble Islands; Fisher's Island Sound; Noank, Connecticut; the Bahamas. Depth.â\\ to IS fathoms, in sand and gravel, algte, etc.; low water. Body oblong-ovate, nearly three times as long as wide, 3 nun. : 8 mm. Length of abdomen equal to a lit- tle more than one-third the length of the entire body, being 3 nun. long. Head with front deepl}' excavate be- tween theantero-lateral angles. Antero- lateral angles prom inent and acute. Eyes large, round, composite, and situated about the middle of the head at the ex- treme lateral margins. On the dorsal surface of the head, extending from the anterior to the posterior margins, is a prominent elevation bearing two tuber- cles, one on either side of the median line, which, in a dorsal view, seem to project forward ])eyond the fi'ontal emargination. The lirst pair of antenme have the basal article large and somewhat dilated: the second and third articles are su])equal, and only a little shorter than the first; the fourth article is a little longer than the third. The tirst antenna' extend to the end of the second article of the second antennie. The basal article of the second pair of antennie is short; the second is long, equal to the third article in length, and also equal to the first two articles of the tirst pair of antemia?; the fourth article is nearly twice as long as the third; the fifth is shorter than the fourth, ])eing only about one and a half times longer than the third; the sixth or flagellar article is about as long as the fourth. When retracted, the second pair of antennie extend to the posterior mar- gin of the fifth thoracic segment. The maxilliped has a palp of four articles. The second, third, and fourth segments of the tho- rax are a little longer than any of the others,
Size: 987px × 2531px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
