1 8 TU. MORTENSEN. (Schwed. Siidpolar-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). 



Antt'doit Adriani F. Jeffr. Bell. Echinoderma. National Antarctic Expedition 1901 — 4. 



Natural History. IV. Zoology. 1908, p. 4. PI. II. 

 PromatJiocriiiiii (.l/it/iometni) Adriani. A. H. Cl.^rk.. L'rinoiden d. Antarktis. Deutsche 



Siidpolar-Exp. 1901 — 3. XV'I. 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. 



Promachucriniis ki'ri:;iielensis. P. H. Carpenter. Report on the Crinoidea of H. M. S. 



Challenger. II. The ComatuL-e. Challenger Reports Vol. 



26. 1888, p. 350. PI. I. I, a— d. PI. LXX. 

 » » F. Jeffr. Bell. Echinoderma. National antarctic Exped. 



1901 — 4. Natural History. IV. Zoology. 1908, p. 3. 



PI. I. 

 » » Cl, HARTL.A.UB. 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 Siidpolar- 



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.) i specimen. 



» 8 (64° 3' ■' 56 37' > Graham Region. 360 m..') i » 



