BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
15. Polypus januarii. 
(Plate 5, Fig. 2.) | 
Octopus januarii Hoyle, '86, p. 97, Plate 7, Figs. 1-4. 
Habitat, — Station 3371, off Cocos Island; March 1, 1891; lat. 5° 26’ 20” 
N., long. 86° 55’ W., 770 fathoms; globigerina ooze ; temperature, surface 
829, bottom 39° ; one specimen d, No. 7944, [H. 41.] 
The body of this example was in a very rotten and disintegrated condition, 
and among the débris at the bottom of the bottle I found several spermato- 
phores. A portion of the radula is figured in Plate 5, Fig. 2. 
16. Polypus macropus? juv. 
Octopus macropus Risso, '26, p. 3. 
Octopus Cuvierii Férussac and d'Orbigny, '35, Poulpes, Plate 4. 
Octopus macropus Jatta, "96, p. 217. 
Habitat. — Arhno Atoll, Marshall Islands ; January 24-26, 1900 ; lat. about 
7? N., long. about 171? 30° E. ; surface of the lagoon, electric light; one young 
specimen 9. [H. 111.] 
This small specimen, not quite 10 cm. in total length, is most likely the 
young of the widely distributed Polypus macropus (Risso), or possibly of an 
undescribed species nearly allied to it. 
17. Polypus, sp. juv. 
(Plate 5, Figs. 3-9.) 
Habitat. — Station 3353, off Cape Mala; February 23, 1891; lat. 79 6' N., 
long. 80° 34' W., 695 fathoms; green mud; temperature, surface 73°, bot- 
tom 39°; 22 specimens, immature; No. 7941. [H. 73-94.] 
In the present instance a small shoal of young specimens would seem to 
have been captured in the trawl. They are quite immature, as may be seen 
from the fact that in some the yolk sac persists in the midst of the arms. I 
am not aware that, specimens as large as these have been found.leading a free 
existence with the yolk sac still unabsorbed. I have seen advanced embryos 
of Sepia and Loligo when artificially liberated swim freely and actively about, 
though I do not know how long they ean survive. 
The disposition of the suckers on the arms of these specimens is curious and 
interesting, for they are sometimes in one row, sometimes in two. In the 
majority of cases the proximal and the distal suckers are in a single row 
(Fig. 7), whilst a greater or smaller number in the middle of the arm are 
arranged biserially (Fig. 6). There are, however, several cases in which the 
whole of the suckers are in a single series, and these occur in specimens where 
other arms have the arrangement described above. The disposition is often 
very irregular, especially where the uniserial arrangement is changing to the 
