. Fig. I. Transverse sections of pellets from marine deposits. a, Pellet of a mollusc ?, from St. 375. b, Pellet of Niiciila sp., from St. WS 144. c, Pellet of Niicida tenuis, from the Clyde. d, Pellet of Niicula moorei, from the Clyde. A second and more complexly sculptured type of rod-shaped pellet was found abundantly at St. WS 144, and consisted of a rod up to o-i6 mm. in diameter with a series of longitudinal grooves on the surface. In transverse section (Fig. i b) this also appeared to be formed almost entirely from diatom remains, and may also therefore be classed as a probable selectiv
. Fig. I. Transverse sections of pellets from marine deposits. a, Pellet of a mollusc ?, from St. 375. b, Pellet of Niiciila sp., from St. WS 144. c, Pellet of Niicida tenuis, from the Clyde. d, Pellet of Niicula moorei, from the Clyde. A second and more complexly sculptured type of rod-shaped pellet was found abundantly at St. WS 144, and consisted of a rod up to o-i6 mm. in diameter with a series of longitudinal grooves on the surface. In transverse section (Fig. i b) this also appeared to be formed almost entirely from diatom remains, and may also therefore be classed as a probable selective feeder. So few pellets have as yet been described that it would be unreasonable to attempt to identify an unknown pellet with any given animal without a considerable knowledge of the fauna of the locality. But this pellet in all respects resembles those at present known for the genus Nucula, and it is at least reasonable to advance the possibility of its belonging to this genus. Nucida pellets are all rods with longitudinal grooves; and all the species which I have so far examined may
Size: 2161px × 2312px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
