INTRODUCTION. IX 
13. The discovery of the most ornate comatiilid known [Sfrotoi/ieira ornaiissimus) which 
exhibits an exaggerated eversion of the distal edges of the brachials finding a parallel only in 
the pentacrinite genus Comasfrocriiuis. 
ZOOGEOGRAPHICAL RELATIUXSI UPS OF THE NEW SPECIES. 
Most of the new species in the "Siboga" collection are more or less closely related to 
previously kuDwn Indo-Malayan types, and oft'er nothing of especial zoogeographic interest; but 
nine of them — a number too large to be ignored — from the Lesser Sunda Islands from 
Sumbawa eastward, and from the Moluccas, are related not to other species from the Indo- 
Malayan region, but to species from southern Japan, a region possessing a well marked and 
distinctive fauna. In addition to these there are two others previously known which show the 
same zoogeographical relationships. These eleven species are : 
Sumbawa-Moluccas species. Japanese representative. 
Coviatulides ausiralis C. decameros 
Comantlieria zvebei'i \ „ . . 
_ , . , ; C. tntermedta 
Lomantheria roUila \ 
Etidiocrinus pinnatus E. variegatus. 
Cyllometra gracilis C. albopurptirea 
Tropiometra afra (Hartlaub) T. macrodisais 
Crossometra hclitis C. septentrionalis 
PerissoDtcfra timorensis P. lata 
Strotometra parvipijina (P. H. Carpenter) ... S. hcpbtcrniana 
Covipsomctra iris C. serrata 
Nanonicfra clyvtcnc N. dozversi 
One species from the same region is most closely related to another from Oceania : 
Leaser Sunda Island species. Oceanic representative. 
Oceanometra fiiagjia O. giganiea 
Another is closely related to a species from Oceania and another from southern China : 
Moluccan species. Oceanic and Chinese representatives. 
r, , , , \ P- t a hit i en sis 
hiiantcaon moliiccaiia 
( E. sinensis 
One well known species from the Lesser Sunda Islands and northern Australia {Step/iano- 
mctra indica) occurs otherwise at Ceylon and among the islands in the southwestern Indian 
Ocean, having been first described from Rodriguez. 
The very complete collections made by the "Siboga" at the Aru Islands have conclusively 
demonstrated that the crinoid fauna of those island is purely and typically Au.stralian, differing 
widely from that of the islands to the west and northwest. 
