96 



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 GOULD'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. BRUCE, 

 the leader of the expedition. 



Polypus tehuelchus, d'Orbigny, 1835? 



Locality. Station 118, Falkland Islands. Lat. 51 49' S., long. 57 51' W. 

 Shore collection. 6th February 1904. One specimen, $ [Hi 696]. 



FIG. 4. Hectocotylised arm of Polypus tehuelchus. 

 a, oral aspect of the extremity. Natural size. 



Port Stanley, Falkland Islands. February 1904. One specimen, ? [H926]. 



Previous Records. East coast of Patagonia, 40 S. ; 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 papillae 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. 



1 believe this specimen to be correctly identified, but there is some little doubt 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 278.) 



