16 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
From the five species of Polypus, which have hitherto been described as hav- 
ing an ocellar spot in front of the eye, the present form is easily distinguished 
as follows : — 
1. From P. pulcher (Brock) (87, p. 607) by the rough surface of the body, 
combined with the absence of any specially prominent cirri. 
2. From P. areolatus (De Haan) (Fer. & D'Orb. '35, p. 65) by the dorsal 
(uot the fourth arms being the shortest), by the smaller development of the 
arms, and by the centre of the eye-spot being light instead of dark. 
3. From P. ocellatus (Appellóf) (86, p. 8) by the relative shortness of 
the ventral arms, by the absence of a cirrus over the eye, by the ocellus being 
situated nearer to the eye than to the umbrella margin, and by its having a 
white centre. 
4. From P. membranaceus (Quoy & Gaimard) (732, p. 89) by the absence 
of the lateral web on the body. 
5. From P. bimaculatus (Verrill,'83A, p. 121) by the rough granular surface, 
with a distinct cirrus over each eye, and by the ocellar spot being of a purplish 
black all over without any paler centre or ring. 
13. Polypus pusillus. 
(Plate 4, Fig. 5; Plate 5, Fig. 1.) 
Octopus pusillus Gould, '52, p. 478, Fig. 591. 
Octopus pusillus Tryon, '79, p. 112, Plate 31, Figs. 32, 88, 
Octopus pusillus Ortmann, '88, p. 614, Plate 21, Fig. 1. 
Station 3356, off Mariato Point ; February 23, 1891; lat. 79 9 30” N., long. 
81° 8° 30” W., 546 fathoms; soft blue mud ; temperature, surface 83°, bottom 
40.21; one specimen Q, No. 7952. [H. 98.] 
Station 3358, off Cape Mala; February 24, 1891 ; lat. 6° 30’ N., long. 81° 
44’ W., 535 fathoms; green sand; temperature, surface 83°, bottom 40.92 ; 
one specimen 9, No. 7954. [H. 54.] 
Station 3363, east of Cocos Island; February 26, 1891; lat. 5° 43' N., long. 
85° 50° W., 978 fathoms; white globigerina ooze ; temperature, surface 839, 
bottom 37.95; one specimen d', No. 7949. . [H. 38.] 
Station 3417, off Acapulco ; April 11, 1891; lat. 169 32 N., long. 99° 48' W., 
493 fathoms ; green mud ; temperature, surface 829, bottom 40.96; one specimen 
9, No. 7950. [H.37.] 
Station 3418, off Acapulco; April 11, 1891; lat. 169 33 N., long. 999 
52 30" W., 660 fathoms; brown sand, black sp.; temperature, surface 829, 
bottom 39°; one specimen 9, No. 7953. [H. 43.] 
It is not without hesitation that I refer all these specimens to the above 
species. Gould’s description leaves something to be desired in the matter of 
fulness and precision, but the most conspicuous character (the large globular 
eyes) is shared by them ; they also agree in the size of the umbrella and in the 
