i8 
TH. MORTENSEN, 
(Schwed. Südpolar-Exp. 
another case one is a nearly full grown Pentacrinoid with 5 cirri, while the other is 
much younger, the arms just beginning to develop; this shows that an egg may 
undergo its embryonal development in the ovary in the same time as a Pentacrinoid 
protrudes through the marsupial opening. It is likewise apparent from the number of 
Pentacrinoids found attached to the pinnules, that generally only one, rarely two eggs 
at a time are developing in the marsupium. Unfortunately none of the fullgrown 
Pentacrinoids have more than one or two arms preserved; but the cirri are well pre- 
served, showing that at least ten cirri are developed, before the young Crinoid de- 
taches itself from its stalk (PI. V. Fig. 6). 
A detailed account of the different stages of the Pentacrinoid will be given in 
the memoir on Crinoid development mentioned in the Introduction. 
4. Anthometra Adriani (Bell). 
Antedon Adriani F. Jeffr. Bell. Echinoderma. National Antarctic Expedition 1901 — 4. 
Natural History. IV. Zoology. 1908, p. 4. PI. II. 
Promachocrinus ( Anthometra ) Adriani. A. H. Clark. Crinoiden d. Antarktis. Deutsche 
Südpolar-Exp. 1901 — 3. XVI. Zoologie Bd. VIII. 1915, p. 135. Taf. 
VI— VII. 
Station 8 (64 3' S. 56’ 37' W. Graham Region. 360 m.?). 
One specimen, in poor condition. 
5. Promachocrinus kerguelensis P. H. CARPENTER. 
Promachocrinus kerguelensis. P. H. Carpenter. Report on the Crinoidea of H. M. S. 
Challenger. II. The Comatulæ. Challenger Reports Vol. 
26. 1888, p. 350. PI. I. i, a — d. PI. LXX. 
E. Jeffr. Bell. Echinoderma. National antarctic Exped. 
1901 — 4. Natural History. IV. Zoology. 1908, p. 3. 
PI. I. 
» Cl. Hartlaub. Die Comatuliden. Reports on the results of 
dredging of the »Blake». Mem. Mus. Comp. Zool. 
XXVII. No. 4. 1914, p. 485. PI. XIV, Fig. 12. 
A. H. Clark. Crinoiden d. Antarktis. Deutsche Südpolar- 
Exped. 1901 — 3. XVI. Zoologie. Bd. VIII. 1915, p. 128. 
Taf. III— V. 
Station 5 (64 20' S. 56° 38' W. Graham Region, SE. of Seymour Isl. 150 m.) 
14 specimens. 
6 (64° 36' » 57° 42' » Graham Region. 125 m.) 1 specimen. 
8 (64° 3' » 56° 3 7' » Graham Region. 360 m.?) 1 
