PYCNOGONIDA OF THE SCOTTISH^NATIONAL ANTARCTIC EXPEDITION. 167 



have become fine setae. I believe that this appearance is entirely due to wear and 

 tear ; these spines and the terminal claw are more or less worn, some of course very 

 much more than others. If in really good condition, I believe these spines would be 

 finely dentate all round the blade. 



The Legs are long, very slender, and attain a length of 180 mm. The three coxae 

 are small and subequal ; the proportions of the remaining joints are as 54, 61, 44, 8, 4. 

 The terminal claw is very small. The limb is supplied at long intervals with very 

 minute setae ; these make their appearance on the femur. The relative sizes of the 

 joints of the leg differ from Dr HOEK'S specimens, in which the femur is the longest 

 joint. There can, however, be no doubt as to the identity of this species. 



In the preparation of this report I am greatly indebted to the Council of the Marine 

 Biological Association of the United Kingdom, and especially to Dr E. J. ALLEN, the 

 Director, for accommodation at their Plymouth Laboratory ; also to my friends Mr and 

 Mrs L. E. SEXTON and Mr J. RITCHIE, who have so generously assisted me with 

 the drawings and the photographs from which they have been prepared. 



REFERENCES. 



(1) BoHM, E., "tiber die Pycnogoniden des Konigl. Zoologischen Museums zu Berlin, insbeeondere 

 iiber die von S.M.S. Gazelle mitgebrachten Arten," Monatsber. Akad. d. Wiss. zu Berlin, pp. 170-195, 

 2 pi., 1879. 



(2) BOUVIBR, E. L., "Observations preliminaires sur les Pycnogonides recueillis dans la Re'gion 

 Antarctique par la Mission du Francais," Bull, du Mus, d'Hist. Nat., 1905, No. 5, pp. 294-7. 



(3) BOUVIER, E. L., " Nouvelles observations sur les Pycnogonides recueillis dans les Regions 

 Antarctiques au cours de la campagne dirigde par M. Jean Charcot," Comptes rendus ties Seances Acad. des 

 Sciences, cxlii., 1906, pp. 15-22. 



(4) BUCHAN, A., " Report on Oceanic Circulation, based on the Observations made on board H.M.S. 

 Challenger, and other Observations," H.M.S. " Challenger" Report* : Summary of Results, 1895. 



(5) COLE, L. J., " Pycnogonids of the West Coast of North America," Harriman Alaska Expedition, 

 vol. x., 1904, pp. 249-298, pi. ix.-xxvi. 



(6) COLE, L. J.. "Ten-legged Pycnogonids, with Remarks on the Classification of the Pycnogonida," 

 Ann. and Mag. N.H., 7, vol. xv., 1905, pp. 405-415. 



(7) DOHRN, ANTON, Die Pantopoden des Golfes von Neapel und der angrenzenden Meeresabschnitte, iii., 

 Leipzig, 1881. 



(8) EIGHTS, J., " Description of a New Animal belonging to the Arachnides of Latreille, discovered in 

 the Sea along the Shores of the New South Shetland Islands," Jour. Boston Nat. Hist. Soc., vol. i., 1834-7, 

 pp. 203-6. 



(9) HODGSON, T. V., " Crustacea," Report on the Collections of Natural History made in the Antarctic 

 Regions during the Voyag? of the "Southern Cross," 1902, pp. 257-8. 



(10) HODGSON, T. V., " On a new Pycnogonid from the South Polar Regions," Ann. and Mag. N. H., 

 7, vol. xiv., 1904, pp. 458-462, 1 pi. 



(11) HODGSON, T. V. "Scotia Collections: On Deoalopoda australis, Eights an old Pycnogonid re- 

 discovered," Proc. Roy. Phys. Soc. Edinburgh, vol. xvi., 1905, pp. 35-42, 2 pi. 



(12) HODGSON, T. V , "Decalopoda and Colossendeis," Zool. Am., Bd. xxix., 1905, No. 8, pp. 254-6. 



(13) HODGSON, T. V., "Pycnogonida," Natural History Collections of the "Discovery" : Zoology, 

 vol. iii., 1907. 



(14) HODGSON, T. V., "Pycnogoniden," Ergebn.\Hamburg. Magalhaens Sammelreise, 1907. 



(ROY. SOC. EDIN. TRANS., VOL. XLVI., 187.) 



