Crinoidea. 453 



mi grooved, one has a partially obliterated ambulacral groove, while on 

 the anterior arms all the pinnules beyond the fifth or sixth pair are 

 grooved. 



One of the specimens from Stat. 21 has the anterior arms 140 mm 

 long and the posterior arms 80 mm long; the usual fine dorsal carination 

 is present; the posterior arms are slightly swollen, the anterior being more 

 slender; three entire arms and the genital pinnules on all the others are 

 ungrooved; the cirri are small, IX, 11 12. The other specimen is smaller, 

 the anterior arms being 100 mm long and the posterior being 55 mm long ; 

 the posterior arms are slightly more stout than the anterior; the cirri are 

 VIII, 11 13, 4 mm to 7,5 mm long. 



Of the two specimens from Stat. 26 one has the anterior arms 90 mm 

 long and the posterior arms 70 mm long; all the arms are grooved, but 

 the first ten pairs of pinnules on the posterior and the first six on the 

 anterior arms are ungrooved ; the brachial carination resembles that in the 

 other specimens; the cirri are X, 12, 6 mm to 7 mm long. 



One of the specimens presumably from the vicinity of Perth has the 

 anterior arms 100 mm long and the posterior arms 60 mm long; there 

 are five ungrooved arms. The other specimen from this locality is some- 

 what smaller; the carination is almost obsolete on the I Br series; the 

 cirri are XIV, arranged in five interradial pairs with four extra, two of 

 which are undeveloped ; the colour is light olive-brown, the centrodorsal, 

 calyx and first two brachials rose colour. 



Remarks. Until very recently this species has always been confused 

 with C. pectinata from which, however, it is quite distinct (cf. Proc. Biol. 

 Soc. Washington, XXIII, p. 95). Although occurring in Australia with 

 that species its habitat is much more restricted, as it does not extend 

 further northward than New Guinea. 



Subfam. Comasterinae A. H. Clark. 



Genus Comaster L. Agassiz. 

 Comaster typica (Loven). 



Literature: See "The recent Crinoids of Australia", and "The recent Crinoids of the 

 Indian Ocean". 



Locality: Port Hed land (20 17' S. lat, 118 34' E. long.); VII. 05 

 (3 young specimens). 



Further Distribution. North o f P o r t W a 1 c o 1 1 (19 42, r S. lat., 

 116 49,8' E. long.); Prince of Wales Channel, Torres Strait: 

 Thursday Island; Port Moll e, Queensland; Fiji; Is hind of 

 J o b i e (near New Guinea); Singapore; N e w Harbour, near 



