. Fig. 18. S. crassus. a, Acanthosoma 2; b, Mastigopus i. Mastigopus I (Figs. 18 6, 19 a-g). Length 4-15 mm. Rostrum 075 mm. Rostrum reaching end of peduncle of antennule; basal spine small. Carapace short, its length about i\ times the breadth. Supraorbital spine very small; marginal spine of Acanthosoma retained. Hepatic spine absent. Dorsal organ minute. Dorsal spines of abdominal somites 1-3 very small, those of 4-6 larger. Pleura rather expanded, with very small points. Telson twice as long as wide, with strong lateral spines; arms of

---

Size: 1669px × 2994px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti