NO. 1798. CRIN0ID8 COLLECTED BY THE ALBATROSS— CLARK. 553 



surface; IBfj rhombic, twice as broad as long, the edges all around 

 strongly everted and coarsely spinous, with a coarsely spinous median 

 carination in the proximal two-thirds, and with coarse spines scat- 

 tered irregularly over the dorsal surface. 



Ten arms; first brachial short, slightly wedge-shaped, three or 

 four times as broad as long exteriorly, the edges all around strongly 

 everted and coarsely spinous, the dorsal surface more or less covered 

 with rather long spines, and with a coarsely spinous median keel; 

 second brachial slightly larger and more obliquely wedge-shaped; 

 third and fourth brachials (syzygial pair) oblong, half again to nearly 

 twice as broad as long; following four brachials approximately 

 oblong, twice as broad as long, then becoming triangular, as long as 

 broad, and further out wedge-shaped, somewhat longer than broad, 

 and elongate terminally; the third-eighth brachials have strongly 

 everted and spinous ends, and have the dorsal surface very thickly 

 covered with rather long fine spines; the median carination seen on 

 the elements of the IBr series and on the first two brachials may 

 be faintly suggested on the third and fourth, but extends no farther; 

 as the brachials become triangular the dorsal spinosity becomes 

 shorter and fmer and less evident, the proximal ends of the brachials 

 become less everted and the distal more so, this distal e version 

 leaning gradually forward, becoming a spinous overlap which is 

 fairly prominent distally ; at the same time the dorsal surface of 

 the brachials becomes marked by numerous fine sharp longitudinal 

 ridges, most prominent distally; in the outer part of the arm the 

 distal part of these ridges breaks up into numerous thickly set 

 anteriorly directed spines. 



Type.—Cdit. No. 27500, U.S.N.M., from station 5445. 



Three other specimens were secured at this station. 



Station 5275. — One specimen. 



Station 5474.— One specimen. 



This form is nearest to Thalassometra attenuata, but it is stouter 

 than that species, with shorter and somewhat stouter cirri, which 

 have usually fewer segments. It differs greatly, however, in the 

 great development of spines on the division series and arm bases, 

 these parts in T. attenuata being comparatively smooth. 



Genus STENOMETRA. 

 STENOMETRA CRISTATA, new species. 



This new species is nearest to Stenometra dorsata from southern 

 Japan, but is a smaller and more slender form; the centrodorsal is 

 proportionately smaller, more conical, and less columnar, with a 

 rounded conical tip, finely papillose; the arms are 85 mm. long in the 

 type, and the cirri are about 40 mm. long; the fifth or sixth cirrus seg- 

 ment, which is the longest, is twice as long as broad, or even somewhat 



