REPORT ON THE CEPHALOPODA. 81 



to form the criterion of a good species, and hence Lamarck's name is here preferred. 

 A long synonymy is given by those authors, which I have not thought it necessary to 

 repeat. 



There seems to be no point of importance by which Targioni-Tozzetti's Octopus 

 incertus can be distinguished from the present form. 



Like most other rough-skinned species of Octopus, this belongs to Professor Steenstrup's 

 group Schizoctopus, characterised by having the umbrella between the dorsal arms 

 very short and the cutaneous sculpture continued over its inner surface. 



Octopus hoscii (Lesueur), var. pallida (PI. L ; PL IIL fig. 2). 



1885. Octopus Boscii (Lesueiir), var. jjolUda, uov., Hoyle, Diagnoses I., p. 223. 

 1885. „ „ „ „ Hoyle, Prelim. Rep. I., p. 97. 



Habitat. — Station 162, off East Moncoeur Island, Bass Strait, April 2, 1874; 

 lat. 39° 10' 30" S., long. 146° 2,7' E.; 38 fathoms ; sand and shells. One specimen, $ . 



Station 163a, ofi" Twofold Bay, Australia, April 4, 1874; lat. 36° 59' S., 

 long. 150° 20' E.; 150 fathoms; green mud. Two specimens, 1 ?, 1 juv. 



Tlie Body is evenly rounded, with a slight depression in the median ventral line. 

 The mantle-opening extends less than halfway round the body, terminating immediately 

 below the eye, and further from it than from the base of the sip>hon, which is long and 

 pointed, has rather a small opening, and extends two-thirds the distance to the 

 umbreUa-margin. 



Tlie Head is short and not so broad as the body ; the eyes are only slightly 

 prominent. 



TJie Arms are subequal, nearly four times the length of the body, and taper 

 evenly to fine points. The umbrella extends one-third up the arms, being a little 

 wider laterally than dorsally. The suckers are closely set, deeply cupped, and marked 

 with regular radial grooves ; their biserial arrangement commences immediately after 

 the first. The extremity of the hectocotylised arm is large and of the usual form 

 except that its interior is furnished with papillee instead of transverse grooves and 

 ridges. The circumoral lip is low and narrow. 



The Surface is covered with warts, which are largest and most numerous on the 

 dorsal surface of the body, head, and umbrella, and dorsal aspect of the arms, where 

 they have a quadrifid or quinquefid form, usually with a small wart in the centre, each 

 forming a figure like a star or rosette (PL I. fig. 2). Towards the ventral surface 

 and on the sides of the arms the warts are simple, and much smaller. On the back 

 are about ten long cirri, which are rough with small warts, and above each eye is a 

 very large arborescent cirrus with six or seven smaller ones beside it (PL L fig. 3). 



(ZOOL. CHALL. EXP. PART XLIV.— 1886.) Xx 1 1 



