106 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



amount of serration of the arms. I examined these specimens at the British Museum. 

 They show that this species has shorter cirri than Z. microdiscus and small and weak 

 proximal pinnules. 



The specimen from Port Molle in the Australian Museum is small with 18 arms, 

 which are about 50 mm. long, and the cirri XVIII, 22-24. Together with it there are 

 some fragments from a larger individual. 



Of the three specimens from Port Curtis one has the centrodorsal large, thick 

 discoidal, with the dorsal pole very slightly concave and 5 mm. in diameter. The cirri 

 are XV, 50-53, from 35 to 38 mm. long. There are 35 arms 80 mm. long. The IIIBr 

 series are 4(3+4) exteriorly and 2 interiorly, as in the genus Himerometra. Another 

 has the centro-dorsal discoidal with the nearly flat dorsal pole about 4 mm. in diam- 

 eter. The cirri are XXXV, 46^8, from 35 to 40 mm. long. Series of 4(3+4) are 

 slightly more numerous than usual. The third specimen is small with 20 arms 60 

 mm. long. All the IIBr series are present. The dorsal pole of the centrodorsal is 

 flat, 2.5 mm. in diameter. The cirri are XXIII, 20-22, 13 mm. long. 



The specimen from off Noosa Head has 29 arms, which are about 100 mm. long. 

 The IIBr series are all 4(3+4). All but one of the IIIBr series are 2. The cirri are 

 XXVII, 4547. The color (dry) is fawn-color with a faint purplish cast, the articula- 

 tions being distinctly darker than the segments. The cirri are dull purple, the bases 

 of the cirri and the centrodorsal being pale brownish. 



One of the specimens from off Sandon Bluffs has 38 arms nearly 100 mm. long. 

 The cirri are XXXV, about 54. The second has 36+ arms (several are missing), 

 which are nearly 100 mm. long. The cirri are XXX+, 47-53. In both the IIBr 

 series and the IVBr series, when present, are 4(3+4). It is common to have the 

 IIIBr series 4(3+4), although 2 seems to be the usual number. The only VBr series 

 noted is 2. In the first specimen the greater part of the arms is light brown, but 

 basally all the arms are heavily shaded with purple, the articulations in particular 

 being very dark. The cirri basally are dorsally pale brown and ventrally deep purple, 

 but distally the purple becomes very gradually dominant until it includes both sur- 

 faces. In the second the arms are light brown with more or less of a purplish cast; 

 basally three of the postradial series are very deep purple, the other two being lighter. 

 The cirri are light brown basally, becoming purple distally. 



Localities. Between Fremantle and Geraldton, Western Australia; Endeavour 

 [A. H. Clark, 1914] (8, U. S. N. M., 35174; W. A. M.). 



?Vicinity of Perth, Western Australia; Hamburg west Australian Expedition, 

 1905 [A. H. Clark, 1911] (1, H. M.). 



Western Australia [= ?Vicinity of Perth] [A. H. Clark, 1912; Hartmeyer, 1916]. 



Mjoberg's station 11; 45 miles westsouthwest of Cape Jaubert, Western Aus- 

 tralia; 22 meters; July 17, 1911 [Gislen, 1919]. 



Broome, Cable Beach; Frances L. S. Clark, September 2, 1929 [H. L. Clark, 

 1938]. 



Broome; hard sandy bottom; H. L. Clark, August and September 1929 [H. L. 

 Clark, 1938]. 



Broome; dredged at various points in 5-15 meters; H. L. Clark, Jiuie 1932 [H. L. 

 Clark, 1938]. 



