No. 1608.] NEW SPECIES OF CRINOIDS—CLARK. 939 
CYLLOMETRA ALBOPURPUREA, new species. 
This species represents C. manca in the waters about southern 
Japan; it differs strikingly from that species in having all the cirrus 
joints subequal in length, the distal with only shght paired tubercles 
on the dorsal side. In C. manca the proximal cirrus joints are much 
elongated, the distal short, with long bi- or tri-dentate dorsal spines. 
The number of arms in C. albopurpurea varies from 10 to 30, but is 
most commonly about 20. The 10 armed forms differ from C. tigrina 
in being more slender, with the second pinnule more slender, and 
composed of much elongated instead of short joints. 
Type.—Cat. No. .22693, U.S.N.M.; from Albatross Station No. 
5095; Uraga Straits, entrance to Tokyo Gulf, Japan; 58 fathoms. 
