. Bulletin of the Natural History Museum Zoology. A NEW ATLANTIC POLYCHAETE 169 65 60 55 50 CO a> 45 o> 40 £ o 35 o d 30 z 25 20 15 10 o + + PAP/53201 o PAP â² TAP â EOS ⦠MAP ⢠PAP/53205 -i 1 1âI 1 r- 4 6 8 Total Length (mm) 10 12 Fig. 4 Graph showing the relationship between size and number of chaetigers. Individuals from different sample sites are identified. PAP- Porcupine Abyssal Plain, MAP - Madeira Abyssal Plain. TAP - Tagus Abyssal Plain, EOS - Cap Verde Abyssal Plain. Parapodia biramous; anterior parapodia laterally orientated, be- coming more dorsal in median and poster
. Bulletin of the Natural History Museum Zoology. A NEW ATLANTIC POLYCHAETE 169 65 60 55 50 CO a> 45 o> 40 £ o 35 o d 30 z 25 20 15 10 o + + PAP/53201 o PAP â² TAP â EOS ⦠MAP ⢠PAP/53205 -i 1 1âI 1 r- 4 6 8 Total Length (mm) 10 12 Fig. 4 Graph showing the relationship between size and number of chaetigers. Individuals from different sample sites are identified. PAP- Porcupine Abyssal Plain, MAP - Madeira Abyssal Plain. TAP - Tagus Abyssal Plain, EOS - Cap Verde Abyssal Plain. Parapodia biramous; anterior parapodia laterally orientated, be- coming more dorsal in median and posterior chaetigers. A row of cushion-like papillae extending across dorsal surface between notopodia on each chaetiger. Notopodia pointed, with straight, blunt-tipped internal aciculae. Dorsal cirri of chaetiger 1 long, thin and tapering; nearly equal in length to median antenna; subsequent dorsal cirri initially shorter with wider bases, but in posterior chaetigers becoming more slender longer and projecting dorsally. Large hooks emergent on chaetiger 3 (Fig. lb, 2, 3b) until one or two chaetigers from pygidium; in posterior chaetigers hooks meeting in midline. Short, delicate capil- laries projecting from most notopodia, just one in anterior chaetigers (Fig. lb, 3a), usually becoming two in posterior segments. Neuropodial lobes pointed, with blunt-tipped, straight aciculae (Fig 3a); initially orientated laterally but become more vertical and dorsal in posterior chaetigers. Ventral cirri absent on chaetiger 2; on 12 10 u> 8 â g '> â 6 6 c o O 4. 4 6 8 Total Length (mm) 10 12 Fig. 5 Histogram showing the range of sizes of collected in the NE Atlantic. other chaetigers thin and tapering, equal to or shorter than neuro- podia, equal to or slightly longer than dorsal cirri. Neurochaetae simple capillaries, slightly expanded at the base just free of the podia, tips quickly taper into a prolonged point (Fig. 3 c,d). Pygidium with two tapering cirri. Anus do
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