Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 LARVAE OF SERGESTES Group I Sergestes atlanticus H. M. Edw. Hansen, 1922, p. 47, Mastigopus. Illig/ 1914, P- 350, Acanthosoma 2 {S. ovatoculus). Material. Fairly common at Bermuda in water of 100-250 metres or more, the Elaphocaris in the deeper layers. Moults obtained from Elaphocaris i to Elaphocaris 2; from Elaphocaris 3 to Acanthosoma; and from Acanthosoma 2 to Mastigopus. Elaphocaris 2 is presumed to belong to this series from similarity in colour and form of posterior dorsal process. Acanthosoma and Mastigopus
Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 LARVAE OF SERGESTES Group I Sergestes atlanticus H. M. Edw. Hansen, 1922, p. 47, Mastigopus. Illig/ 1914, P- 350, Acanthosoma 2 {S. ovatoculus). Material. Fairly common at Bermuda in water of 100-250 metres or more, the Elaphocaris in the deeper layers. Moults obtained from Elaphocaris i to Elaphocaris 2; from Elaphocaris 3 to Acanthosoma; and from Acanthosoma 2 to Mastigopus. Elaphocaris 2 is presumed to belong to this series from similarity in colour and form of posterior dorsal process. Acanthosoma and Mastigopus taken at Discovery Stations 701, 708, 709. 0 b Fig. I. S. atlanticus. a, Elaphocaris i; b, Elaphocaris 2; c, dorsal spine from side. Description. Elaphocaris i (Fig. i a). Length o-8 mm. Anterior process dividing into three equal denticulate spines. Lateral process curved backwards, denticulate, and without spines. Posterior process about two-thirds length of abdomen, denticulate, without spines. Telson branches long and narrow, the long spines subequal. Elaphocaris 2 (Fig. i b, c). Length 1-3 mm. Rostrum 0-94 mm. Rostrum as long as carapace, with seven spines, rather irregularly arranged. Lateral process with five anterior and four posterior spines. Posterior process swollen at base, 1 We have in all cases omitted references which have already been given by Hansen. 2 The colour is indicated by black or stippling in the figures.
Size: 1814px × 1103px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
