No. 1623. NOMENCLATURE OF RECENT CRINOIDS—CLARK. 529 
Type-locality.—° 49’ 15’” south latitude, 182° 14’ 15’” east lon- 
gitude (near the Ki Islands) ; 140 fathoms. H. M.S. Chal- 
_lenger. | 
typica=“ typical.” British Museum. 
Metacrinus nodosus P. H. Carpenter, 1884. 
1884. P. H. Carrenrer, Challenger Reports, XI, Zoology, p. 
344, pls. Lu, 1; detailed description, p. 364; first mentioned, 
p- ol. . 
Type-locality.—29° 45’ south latitude, 178° 11’ west longitude 
(near the Kermadec Islands); 630 fathoms. H. M. S. 
Challenger. 
nodosus=knotty. British Museum. 
Metacrinus rotundus P. H. Carpenter, 1884. 
1884. P. H. Carpenter, Challenger Reports, XI, Zoology, p. 
344; first mentioned, p. 343; detailed description in P. H. 
Carpenter, Trans. Linn. Soc. (Zool.), 2d ser., I, p. 436, 
pl. u3 pl. ua, figs. 1-7 (1885). 
Type-locality.—Sagami Bay, Japan; 70 fathoms. Dr. Ludwig 
Doderlein. 
rotundus=rounded. 
This species must, of course, be dated from the first reference 
where the specific characters are given. Doctor Carpenter in- 
serted it in the key to the species of J/etacrinus, published in the 
Challenger report a year before his formal description appeared. 
As its specific characters are here not only given in considerable 
detail, but its relation to the other species in the genus is made 
clear, we can not but accept this as the description of the species. 
It has been suggested, on good grounds (Sperry, Proc. Mich. 
Acad. Sci., 1902 [1904], p. 195), that this species is identical 
with J. wmterruptus. Those who adopt this view must use 
the name votundus, this having priority of place over ¢nter- 
ruptus, which therefore becomes a synonym. 
Metacrinus serratus Dé6pERLEIN, 1907. 
1907. Doperiein, Die gestielten Crinoiden der Siboga-Expedi- 
tion, p. 34, pl. x1, fig. 5; pl. xu, figs. 3-5; pl. xiv, fig. 10; pl. 
xvii, fig. 2; full description, p. 37; first mentioned, p. 23. 
Type-locality—5° 43.5’ north latitude, 119° 40’ east longitude 
(Sulu Archipelago) ; 522 meters. Dutch S. S. Siboga. | 
serratus=serrate. | | 
Metacrinus stewarti P. H. Carpenter, 1884. 
1884. P. H. Carpenter, Challenger Reports, XI, Zoology, p. 344; 
first mentioned, p. 288; detailed description in Trans. Linn. 
Soc. (Zool.) 2d ser., II, p. 448, pl. wir, figs. 13-18 (1885). 
