NO. 1555. HAWAIIAN IIOLOTHURIANS— FISHER. . 671 



HOLOTHURIA ANULIFERA, new species. 

 Plate LXIX, tigs. 2, 2<,-<l. 



Size small; g-enei'al form cylindrical, rather slender. Mouth and 

 anus terminal. Tentacles 20, not large. Dorsal and \ entral surfaces 

 well diti'erentiated, the former ])eset with slender papilla^ forming- 

 about six longitudinal, irregular series, the latter with more numer- 

 ous pedicels in four single series. Body wall rather thin. Deposits: 

 Tables, and small rol)ust rods with knob-like processes, together with 

 incomplete ])uttons bearing kno])s. and very few complete buttons, 

 the snail knobby rods being by far the most numerous; these in small 

 circular groups and rings. Tables with a sim])le annular disk, there 

 being a perforation at the base of each spire sui:)port, with often a few 

 additional small perfoi'ations; edge spinous. Spire low, as a rule, 

 with four rods, one crossl»eam, and the small crown ending in four to 

 eight short, blunt teeth. Comparatively few of the tables have the 

 spire much higher, ending in four teeth and the smooth disk reduced 

 to a simple ring, often without any perforations. Simple and l^ranched 

 supporting rods in papilhe; fenestrated supporting plates in pedicels. 

 Color in alcohol, dorsal surface yellow ocher, lighter about base of 

 pedicels, splashed with small irregular spots of red; ventral surface 

 grayish, more sparsely spotted with red. Length, 55 mm. ; width, 

 8 null. 



Localities.— Ty^Q (Cat. No. 21213, U.S.N.M.) from Station 3872, 

 Auau Channel, between ^laui and Lanai islands, 43 to 32 fathoms, 

 yellow sand, pebbles, coral; bottom temp., 74. H"; 2 specimens. Sta- 

 tion 3876, same locality, 28 to 43 fathoms, sand and gravel; 1 specimen. 



The calcareous ring is rather delicate, but the pieces are of the 

 usual shape. The interradialia are much smaller than the radialia, 

 and each are about equally excavated (in proportion to relative size) 

 on the posterior margin. The anterior margin of radial pieces is 

 deeply incised, while that of the interradial is in the form of a single 

 tooth, as usual. Polian vesicle single. Madreporic canal one, on 

 right side of mesenter}^, free. Gonad fairly well developed. Cuvier- 

 ian organs present, apparently in a state of development. 



The tables are rather delicate and small. When viewed directl}^ 

 from above or below, the spines of the margin are not so apparent as 

 when the disk is seen from the side, because the teeth are directed 

 upward. The disk has a cruciform central hole, and four peripheral 

 ones at the base of each low spire support. Frequently one or two 

 small accessory perforations are present near one or two of the periph- 

 eral holes. The diameter of the disk of this sort of table is about 

 0.04 to 0.048 mm. The spire commonly terminates in from four to 

 eight teeth, eight when fullv complete. Sometimes one or two sides 

 Proc. N. M. vol. xxxii — 07 43 



