|.-,u "TURK A NOVA" EXPEDITION. 



the raised ridge on the ventro-lateral margin of body present in the "Challenger" 

 specimens, possessing instead a very slight ventral furrow; but in all other external 

 characters they are in dose agreement with the type e.g., arms about three times the 

 length of mantle, and umbrella about one-third of length of arms, and usually a little 

 longer laterally than ventrally, mantle-opening rather narrow, siphon extending half 

 \\ay to mantle-margin, funnel-organ W-shaped. Branched ocular cirri are present, 

 and there are many tubercles on body. There is a strong constriction between head 

 and body. Hectocotylus broad and clumsy, with the lateral margins folded over. 

 P. (tnxf rcdis seems to be very near P. </Iobo.ms, Appellof, but, compared with Bombay 

 examples belonging to the Indian Museum, which I have referred to P. gldbosus, the 

 present specimens have a more closely tubercled body, thicker and shorter arms, no 

 enlarged suckers in male, a longer umbrella, and the already-mentioned row of large 

 spots on arms. An Indian example of P. (/Ivbosus, with mantle of only G mm., shows 

 two rows of large spots on all the arms, which are not distinguishable in the larger 

 specimens. The colour of the chromatophores is redder in P. inixfriili*, and browner 

 in P. gldbosus. The hectocotylus of the latter is much narrower, but this may be due 

 to the Indian specimen being younger (mantle 12 mm.). 



Some specimens which I have seen of P. maeropu*, Risso, belonging to the British 

 and Indian Museums, quite support M. Joubiu's remark ('97, p. 99) as to the close 

 relationship of P. t/loboxtiK and P. int(rn>j>iis. The types of P. duplex (Hoyle) bear 

 a strong likeness to the various sized specimens which are referred here to P. australis, 

 and I think it is probable they will eventually prove to lie the young of that species. 



FIG. 10. Polypus 

 australis, mandi- 

 FIG. 9. Pubji>ns austntlis, radula, X 60. bles, X -. 



ii 



Mil I uni't !{'< <>/ Mule. 



End of body to mantle-margin ......... 1 7 



End of body to eye ........... 23 



Breadth of body ........... 20 



Breadth of head ........... 1 7 



1st right arm ........... 52 



2nd right arm ........... 56 



3rd right arm ........... 46 



1th right arm ........ 60 



1st left arm ............ 53 



2nd left arm ............ 57 



"ml left arm . . ......... 58 



4th left MI-HI ............ 55 



I Icc-tcifotylus ............ 5 



Diameter of largest sucker ......... 3 



