. Fig. 17. hornetra graminea. a, cirrus, x 13. b, proximal part of a ray, x 13. c, disk, in which the anal cone is broken and two of the ambulacral grooves imperfectly seen, x 11. d, z side- and a cover-plate of a distal pinnule, x 66. The oral pinnules differ from those of /. vivipara and /. fiavescens, for P, is as stout and as long as, or longer than, Pj, and P3 is longer than P2. Pi and P, are of 8-10 segments and 3-6 mm. long, depending on the size of the animal; P3 is of 9-12 segments, 3-5-7mm. long. The first three or four segments of Pi are attached by a web of tissue to the disk, and
. Fig. 17. hornetra graminea. a, cirrus, x 13. b, proximal part of a ray, x 13. c, disk, in which the anal cone is broken and two of the ambulacral grooves imperfectly seen, x 11. d, z side- and a cover-plate of a distal pinnule, x 66. The oral pinnules differ from those of /. vivipara and /. fiavescens, for P, is as stout and as long as, or longer than, Pj, and P3 is longer than P2. Pi and P, are of 8-10 segments and 3-6 mm. long, depending on the size of the animal; P3 is of 9-12 segments, 3-5-7mm. long. The first three or four segments of Pi are attached by a web of tissue to the disk, and the lower segments of Pa and P3 are similarly attached to the arm. The first genital pinnule is P4 or P5, of about 10-12 segments; the last is P13 to P,6, of about 15 seg- ments and 7-9 mm. long.
Size: 2155px × 2320px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
