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Transactions. 



delicate transparent web. This recurved portion terminates distally in a 

 long filament, which, in the present specimen appears coiled up within an 

 elongate semi-transparent sac, wh'ch occupies almost the entire outward 

 portion of the hectocotylus. This sac has an opening towards its distal 

 end, through which the filament passes to its connection with the arm 

 proper ; beyond this point the skin of the sac is continuous with the above- 

 mentioned web. The delicate skin which forms the outer wall of the sac 

 contains numerous dark chromatophores. The inner face of the arm is con- 

 siderably wider than the remaining portion, much flattened, and bears 2 

 ultra-marginal series of crowded suckers, about 36 in each row; these are 

 largest from about the 10th to the 15th pairs, thence diminishing regularly 

 in size nearly or quite to the tip of the arm proper, where they are very 

 small. The suckers have a short columnar form with slit-like apertures ; 

 all are closely connected by a membrane. 



The more important measurements of both specimens are appended 

 below. The smaller was the one containing the hectocotylus. 



Measurements. 



Total length 



Length of body, dorsai 



Tip of body to base of dorsal arms 



Width of body 



Width of neck (nuchal commissure) 



Width across eyes 



Length of funnel 



Length of right dorsal arm (excluding velum) 



Length of left dorsal arm (excluding velum) 



Length of right second arm 



Length of left second arm . . 



Length of right third arm . . 



Length of left third arm 



Length or right ventral arm 



Length of left ventral arm . . 



Length of umbrella between dorsal arms 



Length of umbrella between ventral arms 



These specimens were collected on Denham 

 by R. S. Bell. 



Bay beach, Sunday Island, 



Fam. POLYPODIDAE Hoyle, 1904. 

 Genus Polypus Schneider, 1784. 

 Polypus oliveri n. sp. 



Body of firm consistency, plump, of rounded pyriform outline, broadest 

 posteriorly, a well-marked longitudinal groove in the median line below. 

 Pallial aperture of moderate width, extending almost exactly half-way 

 between the funnel and eye on either side. 



Head short, considerably narrower than the body, from which it is 

 rather poorly delimited by a slight constriction. Eyes elevated, con- 

 spicuous, with small puckered openings. Funnel short, bluntly conical, 

 its apex extending about half way to the margin of the umbrella between 

 the ventral arms. 



Arms quite short, on an average somewhat more than four times as 

 long as the body, or three times as long as the head and body taken 



