410 PROCEEDINGS OF THE ACADEMY OF [July, 



of large elongate-pyriform cushions on the ventral wall; a narrow 

 membranous ridge running down the centre of the median pad 

 terminates anteriorly in a minute slender papilla. 



Arms rather short, but the shortest ones usually at least as long 

 as the mantle, the others somewhat longer; unequal, the order of 

 relative length usually about 2, 3, 4 = I 7 ; dorsal (outer) margin of 

 ventral arms carinate, the others rounded; outer surfaces smooth. 

 Umbrella lacking or at best rudimentary between the dorsal arms, 

 better developed between the dorsal and second arms and between 

 these and the third pair; between the third and fourth pairs it 

 extends for over one-quarter of their length as a broad web ensheath- 

 ing the base of the tentacles, becoming again much reduced or even 

 obsolete between the ventral arms. Suckers on all the arms closely 

 crowded in four rows, except at the extreme base where they appear 

 in two to three rows; obliquely poised on stout conical pedicels 

 so that they are easily rubbed off, leaving the stumpy pedicels intact; 

 nearly spherical; apertures small, with smooth horny rings. 



The above remarks I believe to be equally applicable to either 

 sex, but in the detailed arrangement and appearance of the suckers 

 a number of fairly conspicuous differences become evident. In the 

 9 the suckers at corresponding parts of all the arms are subequal 

 and exceedingly minute, their diafrieter little greater than that of the 

 thickened bases of the pedicels. In the cT, left ventral arm conspicu- 

 ously hectocotylized; distinctly thicker and perhaps a little shorter 

 than its mate; all the suckers nearly as small as in the '9 , the first 

 two or three pairs in two to three rows, the remainder in four; about 

 where the four-rowed condition commences, two components of 

 the outermost (ventral) row become modified 'as a pair of elongate 

 suckerless papillae; subsequent to this point ensue about six quar- 

 tets of normal suckers reaching somewhat less than half way up the 

 arm. Here the suckers of the two ventral rows are succeeded by a 

 single series of much enlarged, compressed, transversely elongate, 

 tightly palisaded papillae of a very characteristic appearance, bearing 

 the merest rudiments of suckers at their tips; these rudiments have 

 mouth-like apertures, but do not have the appearance of mere lips 

 as figured by Hoyle for E. stenodactyla, since close examination reveals 

 the presence of well-developed though minute horny rings, their 

 margins minutely but distinctly dentate with a number of acutely 



7 Variations from this formula occur frequently in my material, but in this 

 instance the majority of them seem due merely to poor preservation. 



