278 DR WILLIAM EVANS HOYLE ON THE 
marked constriction between the head and umbrella, as well as of the membrane 
along the sides of the body, and in the fact that the enlarged suckers are found 
in all the arms. It is impossible to ascertain whether this last peculiarity occurs 
in Gouup’s species, but his comparison with P. fontanianus, in which only the 
lateral arms have enlarged suckers, would lead one to suppose that such was the 
case in his species also. 
I have much pleasure in dedicating this species to my friend Dr W. S. Brucs, 
the leader of the expedition. 
Polypus tehuelchus, VOrbigny, 1835 ? 
Locality.—Station 118, Falkland Islands. Tat. 51° 49’ S., long. 57° 51’ W. 
Shore collection. 6th February 1904. One specimen, ¢ [H 1696]. 
Fic. 4.—Hectocotylised arm of Polypus tehuelchus, 
a, oral aspect of the extremity. Natural size. 
Port Stanley, Falkland Islands. February 1904. One specimen, ? [H 926]. 
Previous Records.—EKast coast of Patagonia, 40° 8.; Strait of Magellan; Punta 
Arenas; Nicaragua; St Thomas, Danish West Indies. 
The skin of the upper part of the body, and especially of the head, is very 
much wrinkled, but this is probably due to the action of reagents, as no traces of 
definite papille can be found. The animal was most likely smooth in the natural 
state. The hectocotylised arm of the male (fig. 4) has a very well-developed 
seminal groove, especially at the proximal end, where the membrane forming it 
stands out very distinctly from the surface of the arm. The tip is comparatively 
short and broad, measuring 6x3 mm., and of quite normal form; the terminal 
groove is small and narrow ; its margins are deeply folded (perhaps owing to reagents), 
and there are no transverse ridges across its bottom. The radula is shown in fig. 5. 
I believe this specimen to be correctly identified, but there is some little doubt. 
