18 THÉEL, PRIAPULID8 AND SIPUNCULIDS OF THE SWEDISH ANTARCTIC EXPEDITION 1901 — 1903. 



we in the two polar seas see two identical specimens, absent in the whole intermediate 



Priapulus caudatus Lam. forma tuberculato-spinosus Baird. 



Pl. I. figs. 1 — 12. 

 1868. Priapulus tuberculato-spinosus Baikd. 1 



1888. » » » DE GUEIiNE. 2 



1889. Priapulus caudatus Lam. var. antarcticus Michaelsen. 8 

 1902. Priapulus caudatus Shipley. 4 



Habitat. — Cape Virgin, Patagonia, 37 fathoms, stones, one little specimen (Eu- 

 genie Expedition 1851—1853). — Puerto Harberton, Tierra del Fuego, 10 — 20 fathoms, 

 bottom of dead shells and balanids, two small specimens (Nordenskiöld^ Exp. 14 /2 1896). 

 — Graham region, 64° 3' s.— 56° 37' w., 360 m., loose clay, a single very minute 

 specimen (Swedish South Polar Exp. ll U 1902). — South Georgia: Kochtopfbucht, 

 54° 22' s.— 36° 28' w., 22 m., clay with algae, a small specimen (Sw. S. P. Exp. 30 /r, 

 1902. — Falkland Islands: Stanley Harbour, 51° 42' s.— 57° 50' w., 10 m., mud and 

 shells, a rather large specimen (Sw. S. P. Exp. 3 /» 1902). — South Georgia; Cumber- 

 land Bay in Grytviken, one specimen (E. Sörling 1905). 



There cannot be any doubt that all the specimens of Priapulus which have 

 been brought home in the course of time from South Georgia, the Falkland Islands 

 and Tierra del Fuego belong to the same species and, besides, that they are so closely 

 related to the northern Priapulus caudatus Lam., that they scarcely can be distin- 

 guished. Considering that the Swedish State Museum contains great collections of 

 the northern form I have had excellent opportunities for comparing specimens from 

 the two cold regions. It is true that the specimen from Falkland Islands described 

 by Baird in 1868 obviously presents some differences which, however, may be attri- 

 buted to individual defects or to a more advanced age. For the specimen examined 

 by Baird was an old one, having attained the considerable length of five inches, 

 while all the antarctic forms at my disposal have been very young or by far not full- 

 grown. Thus, when Baird states that the teeth have only one (the central) spine, 

 and that the lateral small teeth seen in other specimes, appear to be altogether 

 wanting, this evidently is owing to the great age and to these lateral small teeth 

 having been broken or quite worn off. 



De Guerne had for investigation four specimens, one from Orange Bay not 

 far from Cape Horn, another from the Strait of Magellan and two from the Falkland 



1 Monograph of the species of Worms belonging to tlic Subclass Gephyrea. — Proceed. Zool. Soc. 

 London 1868. i». 106. pl. XI. fig. :i. 



8 Priapulides. - Mission scientifique du Cape Horn. 1882—1883. VI. Zoologie. Paris 1888. ]•. 9, 

 pl. 1, figs 1, !); pl. 2, figs 1, (I. 



8 Die Gephyreen von Sad-Georgien nach der Ausbeute der Deutschen Station von L882 83. — Jahr- 



buch der Hamburgischen Wissenschaftlichen Anstalt. VI. Hamburg L889. i>. 10. lig. 3. 



1 Gephyrea. Natural History collections of the »Southern Cross». London. j>. 2s4. 



