i i 
JAN. 4, 1923 CLARK: REVISION OF PENTACRINIDAE 9 
d? all of the division series 2(1+2) 
e! cirri long and stout, composed of more than 20 (usu- 
ally more than 30) segments, the whorls of cirri 
being separated by 1-10 pentagonal to bluntly 
stellate internodals 
Diplocrinus 
e’ cirri short, consisting of about 18 segments, the 
whorls separated by 30-40 or more rounded 
internodals 
! Annacrinus 
b? elements of the [Br series not united by syzygy 
c! more than 10 arms 
Neocrinus 
c? ten arms only 
Hypalocrinus 
Genus Metacrinus P. H. Carpenter 
Metacrinus P. H. Carpenter, Bull. Mus. Comp. Zodl., vol. 10, No. 4, 1882, 
p. 167 (no species included).—P. H. Carpenter, “Challenger” Reports, 
Zoology, vol. 11, part 32, 1884, p. 344. 
Diagnosis.—A genus of Pentacrinide in which the first axillary is beyond 
the fourth, and is usually the seventh, post-radial ossicle. 
Genotype.—Metacrinus wyvillii P. H. Carpenter, 1884 (cf. A. H. Clark, 
Proc. U. 8. Nat. Mus., vol. 34, 1908, p. 527). 
Geographical range.—From southern Japan to the Kermadec Islands and 
southeastern Australia, and westward to the Kei Islands. 
Bathymetrical range.—From 119 to 1133 meters. 
Included forms.—Metacrinus costatus P. H. Carpenter, M. cyaneus H. L. 
Clark, M. interruptus P. H. Carpenter, M. moseleyi P. H. Carpenter, M. 
nodosus P. H. Carpenter, M. rotundus P. H. Carpenter, M. stewart: P. H. 
Carpenter, M. wyviliii P. H. Carpenter, and M. zonatus A. H. Clark. 
Saracrinus, gen. nov. 
Diagnosis.—A genus of Pentacrinide in which the fourth post-radial 
ossicle is the first axillary. 
Genotype.—Metacrinus nobilis P. H. Carpenter, 1884. 
Geographical range.—From the Korean Straits and the Bonin Islands to 
the Kermadec Islands and southeastern Australia,? and westward to Sumatra. 
Bathymetrical range-—From 55 to 1133 meters. 
Included forms.—Saracrinus acutus (Déderlein), S. angulatus (P. H. Car- 
penter), S. bathert (A. H. Clark), S. batheri var. gracilis (A. H. Clark), S. 
cingulatus (P. H. Carpenter), S. nobilis (P. H. Carpenter), S. nobilis var. 
borealis (A. H. Clark), S. nobilis var. murrayi (P. H. Carpenter), S. nobilis 
var.-nobilis (P. H. Carpenter) (= var. typica [Déderlein]), S. nobilis var. 
2 It is evident from Dr. H. L. Clark’s description of Metacrinus cyaneus (Piol. Results 
Fishing Expeyiments F. I. 8. ‘‘Endeavour,”’ vol. 4, part 1, 1916, p. 9) that some of his 
specimens belonged to a species of this genus; the figure, however, represents a true 
Metacrinus, 
