NO. Id!)!. .SEVEXTEEN NEW SPECIES OF CRiyOIDS—CEARK. 645 



row, chevron-shaped or crescentic, or entirely concealed; IBr. (axil- 

 lary) larc:e, rhombic, half again to twice as long as broad, the edges 

 all around smooth and ])rominent, with a moderate rounded median 

 carination; IIBr 2, the first very short, the axillary rhombic, about 

 twice as broad as long; IIIBr 2, similar to the IIBr, developed 

 interiorly in 1,2,2,1 order. The division series are perfectly smooth 

 dorsally, in close lateral apposition and sharpl}^ flattened; the edges 

 of the component joints are slightly prominent, and the axillaries 

 have a slight broadly rounded median ridge, most pronounced on 

 the first. One specimen has one IIBr series, and one IIIBr series 4 

 (34-4). 



Thirty arms, 150 mm. long, resembling, except in ornamentation, 

 those of \he other species of the genus; after the third or fourth 

 brachial strongly overlapping distal ends are developed, the middle 

 of which is swollen into a broad tubercle which may extend back- 

 ward to the proximal end of the joint; after the thirtieth brachial 

 this gradually disappears. 



The pinnules are essentially as in the other species of the genus. 



Type-specimen.— Q?ii. No. 25473, U.S.N.M.; from Albatross Sta- 

 tions Nos. 2319-2350, off Havana, Cuba; depth between 33 and 279 

 fathoms. 



CRINOMETRA MARGARITACEA, new species. 



Cirri XX, 13-15, 20 mm. long. 



Ends of the basal rays visible in the angles of the calyx, bearing one 

 or more long tubercles; radials concealed; IBr^ very short, five or six 

 times as broad as long, the edges parallel and slightly curved; IBr„ 

 (axillary) rhombic, about two and one-half times as broad as long; 

 IIBr 2; IIIBr 2, developed interiorly, but never present in the full 

 series. The division series and first two brachials are slightly convex 

 dorsally and are in close lateral apposition and sharply flattened later- 

 ally ; the first eighteen or twenty brachials are also sharply flattened 

 laterally. The axillaries and preceding joints are separated in the 

 outer part of their contiguous surfaces, forming rhombic water pores ; 

 the first and second brachials are similarly separated interiorly. 

 The ornamentation consists of moderately large blunt tubercles dis- 

 tributed evenly over the surface of the division series, becoming 

 gradually less marked after the second brachial and disappearing 

 altogether at about the end of the proximal fourth of the arm. The 

 IIBr and IIIBr series and the first two brachials have a low but 

 prominent rounded narrow median carination ; this is continued onto 

 the arm bases in the shape of prominent median tubercles on each 

 joint which disappear at about the end of the proximal fourth of 

 the arm. 



Twenty-one to twenty-nine arms, resembling in structure those of 

 other species of the genus. 



Proc.N.M.vol.xxxvi — 09 45 



