542 PYCNOGONIDA . CHAP. XXI 
with, Sars’ P. producta, a species that scarcely differs from P. brevirostris, 
save in its greater attenuation ; the same species has also been recorded from 
Millport and from Port Erin. 
P. spectrum, Dohrn: Plymouth (A. H. Norman). 
Besides the above, all of which are littoral or more or less 
shallow-water species, we have another series of forms, or, to 
speak more correctly, we have two other series of forms, from the 
deep Atlantic waters within the British area. In the cold area 
of the Faeroe Channel we have Boreonymphon robustum, Bell ; 
Nymphon elegans, Hansen; N. sluiterit, Hoek; N. stenocheir, 
Norman ; Colossendeis proboscidea, Sabine; C. angusta, Sars. In 
the warm waters south and west of the Wyville-Thomson ridge 
we have Chaetonymphon spinosissemum, Norman; Nymphon 
gracilipes, Heller (non Fabr.); WV. hirtipes, Bell; WV. longitarse, 
Kr.; WN. macrum, Wilson; Pallenopsis tritonis, Hoek (= P. holti, 
Carpenter); Anoplodactylus oculatus, Carpenter, and A. typhlops, 
G. O. Sars; and to the list under this section Canon Norman 
has lately made the very interesting addition of Paranymphon 
spinosum, Caullery, from the Porcupine Station XVIT., 8.S.E. of 
Rockall, in 1230 fathoms. Lastly, and less clearly related to 
temperature, we have Chaetonymphon tenellum, Sars; N. gracilipes, 
Fabr.; WV. leptocheles, Sars; NV. macronyxz, Sars; NV. serratum, Sars ; 
and Cordylochele malleolata, Sars. 
Of the species recorded in the above list as a whole, Anoplo- 
dactylus virescens, Nymphon gracile, and Pallene spectrum reach 
their northern limit in the southern parts of our own area; 
Ammothea echinata, Anoplodactylus petiolatus, Pallene brevirostris, 
and Phoxichilus spinosus (or very closely related forms) range from 
the Mediterranean to Norway, the last three also to the other 
side of the Atlantic; Nymphon brevirostre and N. rubrum range 
from Britain, where they are in the main East Coast species, to 
Norway. Of the Atlantic species, other than the Arctic ones, 
the majority are known to extend to the New England coast. 
