. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. LARVAE OF SERGESTES 29 a group of long spinules at base, but not swollen. Dorsal organ not seen. Telson arms almost at right angles to body line, long and slender. Eye small, pear-shaped, with small anterior ventral papilla and without pigment (in formol). Elaphocaris 3 (Fig. 20 b). Length 2-16 mm. Rostrum 1-28 mm. Rostrum without long spinules at base. Supraorbital spine longer than eye. Lateral process as in stage 2, with swollen base. Posterior process not reaching end of body. Dorsal organ v
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. LARVAE OF SERGESTES 29 a group of long spinules at base, but not swollen. Dorsal organ not seen. Telson arms almost at right angles to body line, long and slender. Eye small, pear-shaped, with small anterior ventral papilla and without pigment (in formol). Elaphocaris 3 (Fig. 20 b). Length 2-16 mm. Rostrum 1-28 mm. Rostrum without long spinules at base. Supraorbital spine longer than eye. Lateral process as in stage 2, with swollen base. Posterior process not reaching end of body. Dorsal organ very small. Telson as in stage 2. Eye large, about one-quarter length of body, the diameter of the eyeball about half length of eye. Acanthosoma i (Fig. 21 a-c). Length 4-0-4-45 mm. Rostrum 1-5 mm. Rostrum nearly as long as thorax. Carapace nearly twice as long as wide. Supra- orbital spines shorter than eyes, with very small spinules. Hepatic spines large. Two pairs of lateral spines, of which the posterior is the smaller, with small spinules. Posterior dorsal spine short. Abdominal somites with dorsal spines of somites I and 2 small, those of 3-6 larger; lateral spines very long, those of somite 5 the longest, and directed back- wards at angle of 45°. Ventral spines absent. Telson twice as long as wide, with long lateral spines inserted at base of telson fork. The position of the lateral spine is somewhat variable, but it is always close to the fork. Arms of apical fork very long, slender, parallel at first and diverging towards end. Each branch has two inner and two outer marginal spines. Antennal scale of much the same shape as in S. tenuiremis, with five apical setae and one small outer seta; flagellum about i\ times as long as scale, with marginal spine at base and near end. Eye very long and slender, about one-sixth length of body, the eyeball round, its diameter less than half length of eye. There is a small papilla on eyestalk. ^ Mandible without palp. Pleopods small,
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
