164 
Heterometra singularis (Å. H. Clark). 
Heterometra singularis 1909. A. H. Clark, Proc. U. S. Nat. Mus., Vol. 
;P . 
Singapore; April 20, 1906. One fine specimen, in 
much better condition than the badly broken type, with twelve 
arms 65 mm. long, two IIBr 4 (3 —+— 4) series being developed 
on adjacent rays, and cirri XV, 26—31, 15 mm. to 18 mm. long. 
This species appears to represent H. savignii in the East 
Indian region; it is a smaller form, with probably somewhat fewer 
cirrus joints and more uniform proximal pinnules, the first pinnule 
being very nearly as large as the second, which again is about 
the size of the third. The type, the only specimen heretofore 
known, was taken in the southern portion of the Straits of Malacca, 
and is in the Indian Museum at Calcutta. It was compared 
directly with the present specimen, and the only difference found 
was the slightly greater number of cirrus joints in the latter; 
none of the remaining cirri in the former, however, appear to be 
quite mature. 
Hleterometra martensi (Hartlaub). 
Anteden martensi 1890. Hartlaub, Nachr. Ges. Gåttingen, Mai 1890, 
P- 
ometra martensi 1907. A. H. Clark, Smiths. Miscell. Coll. (Quar- 
> 
Himer 
terly Issue), Vol. 50, p. 356. 1909. Proc. Biol. Soc. Washington, Vol. 22, p. 7. 
Singapore; April 4, 1906. One specimen, agreeing 
well with Hartlaub's description and figure; it has seventeen 
arms 50 mm. long, four IIBr series being developed, of which 
tbree are 4 (3 + 4) and one 2, and three IIIBr series, all on one 
ray, two 4 (3 + 4) following the IIBr 2 series, and one 2, devel- 
oped internally. The cirri are rather slender, XII, 26—30, 
20 mm. long, the joints with somewhat prominent ends. Pp (or 
P;) is 9mm. long with twenty-one or twenty-two joints, very 
stout basally but tapering evenly and becoming flagellate distally; 
P, is similar, but somewhat smaller; the following pinnules are 
small and weak. 
Described originally from a badly broken specimen from Singa- 
