hoyle: keports on the cephalopoda. 



13 



Habitat. — Tropical Pacific ; September 1, 1899 ; lat. 18° 19' N., long. 134° 57' 

 W.; surface, 8 p. m.; temperature, surface 76° ; two specimens 9 . [H. 151, 152.] 



I refer these specimens to the above species with a 

 little hesitation, because although the general appear- 

 ance and relative lengths of the arms agree fairly well, 

 there is a very definite pattern of conspicuous chro- 

 matophores on the back of the head in both specimens, 

 which does not appear either in d'Orbigny's description 

 or figures. There are two large round chromatophores 

 over each eye (compare Figure A), the anterior a little 

 nearer the middle line than the posterior. Almost in 

 the centre of these four is a smaller one, whilst two 

 others nearer the middle line peep out from under the ^ ^ ^ 

 mantle-margm behind. On the arms are first three or quoyanus? Dorsal 

 four chromatophores in a single series, and then a view. X 2|. An., 

 double series almost up to the extremity. Aquiferous pores. 



10. Tremoctopus scalenus,^ sp. n. 



(Plate 4, Figs. 6-9.) 



ITaftrtoi. — Station 3388, off Cape Mala ; March 9, 1891; lat. 7° 6' N., long. 

 79° 48' W. ; temperature, surface 73°; one specimen 9, No. 7963. [11. 51.] 



The Body is roughly ovoid in form, but so mutilated posteriorly that it is 

 difficult to make out its original shape correctly. The posterior extremity 

 appears, however, to have been bluntly pointed as shown in the restored out- 

 line (Plate 4, Fig. 7). 



The Head is small, the sides being occupied entirely by the prominent eyes. 

 The integument is so damaged that the aquiferous pores can no longer be 

 made out. 



The Arms are very slender and of unequal length, the second pair enor- 

 mously exceeding the others. The Suckers (Figs. 8, 9) are small, prominent, 

 widely separate and alternating. There is no trace of hectocotylization. 



Dimensions. 



mm. 



Length, total 120 



End of body to mantle-margin 15 



End of body to oye 17 



Breadth of body 9 



Breadtli of head 6.5 



Diameter of largest sucker 0.75 



^ In allusion to the marked inequality in the length of tiie arms. 



