Archive image from page 225 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 2l6 DISCOVERY REPORTS As in the Scotia specimens the dorsal keel on pleon segments 1-3 is scarcely marked in the no. 3 specimens, though it is in both specimens of no. 1. The first side-plate is not as deep as its segment and is in fact slightly smaller than the 2nd. The telson is not longer than the 6th pleon segment. It is not so in Pfeffer's figure, and it seems possible that Pfeffer by a slip wrote 'urn ein Drittel liinger' (p. 123) instead of '. . .kiirzer'. The antennae are propo
Archive image from page 225 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 2l6 DISCOVERY REPORTS As in the Scotia specimens the dorsal keel on pleon segments 1-3 is scarcely marked in the no. 3 specimens, though it is in both specimens of no. 1. The first side-plate is not as deep as its segment and is in fact slightly smaller than the 2nd. The telson is not longer than the 6th pleon segment. It is not so in Pfeffer's figure, and it seems possible that Pfeffer by a slip wrote 'urn ein Drittel liinger' (p. 123) instead of '. . .kiirzer'. The antennae are proportionately not so stout as in Pfeffer's figure. In gnathopod 2 the 6th joint is not as long as the 2nd; in the middle of the palm there is a short stout spine, followed by a step, the defining angle bearing a long slender spine as described by Pfeffer. The step in the palm is scarcely indi- cated in immature specimens of 23-26 mm. length. The 2nd joints of peraeopods 3-5 are quite different in lot no. 3, being much more elongate, and having the front and hind margins nearly straight and parallel, though converging slightly distally; the greatest breadth goes at least twice into the length in peraeopod 3, and 2-3 times in peraeopod Fig. 133. Paraceradocusmiersi{?ir.). Gnathopod 2. 5. These three peraeopods are altogether longer than in Pfeffer's figure. Comparing, however, the <$ of no. 1 (42 mm.) with a 46 mm. $ of no. 3, we find that peraeopods 3-5 are all much shorter proportionately, peraeopod 5 of the S only equalling peraeopod 3 of the 9. The 2nd joints also are stouter, especially proximally. These specimens therefore approximate to the typical form. The peduncle of uropod 1 has a well-marked tooth bearing a spine about midway on lower margin; Pfeffer's figure shows a spine nearer the base. The rami of uropod 3 are represented in Pfeffer's figure as much too broad, even for Pfeffer's description (here again a slip occurs: 'Breite beim <$ noch nicht \ der Breite',
Size: 1750px × 1143px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
