155 
Family Himerometridæ. 
Genus Himerometra A. H. Clark. 
Himerometra 1907. A. H. Clark, Smiths. Misc. Coll. (Quart. Issue), 
5 
Himerometra crassipinna (Hartlaub). 
Antedon crassipinna 1890. Hartlaub, Nachr. Ges. Gåttingen, Mai, 
1890, p. 185. 
Hineromdtra pp son ag 1907. A. H. Clark, Smiths. Misc. Coll. (Quart. 
Issue) Vol. 50, p 
sanne June 4, 1903. Two specimens. 
June 17, 1904. Two specimens. 
June 15, 1905. Two specimens; one has thirty-one arms 
70 mm. long, the other thirty-six arms 70 mm. long. 
June 16, 1907. Five specimens, with from twenty-nine 
to forty-three arms 65 mm. to 80 mm. long. 
July 22, 1907. Two specimens. 
November 27, 1907. Three specimens, with twenty-seven 
arms 70 mm. long, thirty-seven arms 80 mm. long, and thirty-eight 
arms 70 mm. long, respectively. These specimens are typical of 
the whole series; the centro-dorsal has a broad, slightly concave, 
polar area; the cirri have thirty joints, sometimes rather less, but 
more commonly rather more; II Br series åre always present, almost 
invariably 4 (3 + 4); the exterior INBr series are 4 (3 + 4), 
the interior 2, as described by Hartlaub; where a deficiency in 
the IIIBr series occurs, the exterior IIIBr are usually omitted, 
tending toward a IIIBr arrangement of 1, 2, 2, 1; IV Br series 
are, when present, 2, developed externally in reference to the 
IIBr series. " The overlapping of the distal edges of the brachials 
begins at the second, and is strongly developed. Pp is about 
13 mm. long, very stout, the component joints with prominently 
Spinous ends. 
The specimens are all paåle flesh-coloured or light purplish, 
the perisome brown, as are more than twenty others which I have 
examined from the same locality; they are all practically uniform 
