. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 122 DISCOVERY REPORTS is a pair of brown eyes. The neck is wide and short. The first chaetigerous appendage is absent and the second may be almost as long as the body. From the fourth foot backwards there is a chromophil gland in the ventral pinnule lying just beyond the apex of the ventral trunk. This gland is very variable in size, and may occupy the whole distance from the tip of the trunk to the end of the pinnule, or it may be a comparatively small structure lying just inside the border of
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 122 DISCOVERY REPORTS is a pair of brown eyes. The neck is wide and short. The first chaetigerous appendage is absent and the second may be almost as long as the body. From the fourth foot backwards there is a chromophil gland in the ventral pinnule lying just beyond the apex of the ventral trunk. This gland is very variable in size, and may occupy the whole distance from the tip of the trunk to the end of the pinnule, or it may be a comparatively small structure lying just inside the border of the pinnule. There is a small and often indistinct hyaline gland lying above and behind the chromo- phil gland. The ventral surface of the neuropodial pinnule is furnished with numerous, fine, parallel tubules which appear to open at the ventral border of the pinnule. These tubules stain very readily, and constitute a diiTuse extension of the chromophil gland. The gonad lies in the dorsal ramus of the foot. Remarks. This is an eurythermic species inhabiting the cold and temperate waters of both hemispheres. Family TYPHLOSCOLECIDAE A large lobe above the brain (caruncle) Travisiopsis Cerebrallobe indistinct Sagitella Genus Sagitella, Wagner Body cylindrical. Prostomium conical ending in a palpode. A lobe above the brain and paired nuchal organs. No vibratile cushions. The first three segments have each a single pair of foliaceous cirri, and the remaining segments have dorsal and ventral cirri. Bristles absent from the first few segments. The body ends in a pair of foliaceous anal cirri. Sagitella lobifera, Ehlers (Fig. i6 a, b). Ehlers, 1912, p. 24, pi. iii, figs. 1-4. Monro, 1930, p. 90. Occurrence. St. 395 (11); 590 (3). Specific characters. Between 25 and 30 mm. in length by 3 mm. in breadth for 22 cirrigerous segments. The colour in spirit is pale yellow or pale green. In life it is deep scarlet. The head is a sharply tapering cone and ends in a fili- form palpode (Fig. 160)
Size: 1518px × 1646px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
