NO. 1555. HAWAIIAN HOLOTHIJRJANS— FISHER. 673 



marked from dorsal and beset with more numerous pedicels without 

 order ; pedicels not crowded. Tentacles 18, wnth fairly large crowns. 

 Circumoral collar slight or not at all present ; impossible to tell from 

 condition of specimen. Body wall v^ery tough but not remarkably 

 thick. Color in alcohol : Dorsal, surface rather dark olive brown ; 

 papilla? surrounded by a lighter ring"; \ entral surface dull gray'ish 

 brown or light sepia, tentacles yellowish. Deposits : Tables and rough 

 buttons. Tat)les of two kinds : (1) Numerous small tal)les with a sim- 

 ple annular disk bearing blunt spines on the edge and with a cruciform 

 central hole and a perforation formed by the forked base of each spire 

 support; or the disks may t)e larger with a small perforation at either 

 side of the larger peripheral ones; spire low, made up of four rods; 

 one crossbeam, and a circular crown bearing* about 8 teeth ; ci'own 

 often incomplete or irregular, sometimes quadrate ; (2) a few yery 

 largo tables with a large perforated disk, ii'regular margin, and a spire 

 ending in a single (?) point. Buttons elliptical* with two to twxnty- 

 two holes, usually four or five, the edge rough, and the surface cov- 

 ered with yery many small granular elevations. Length about 65 mm. 



Locality. — Station 3834, south coast of Molokai Island, reef near 

 Kaunakakai. 



7///>.'.— Cat. No. 21214, U.8.N.M. 



In addition to somewhat larger papilhe, comparatively few in num- 

 ber and each in the middle of a light spot, there are scattered between 

 them more numei'ous smaller ones. The larger papilhe, easily seen 

 by the light spots, form about five very irregular rows. There are 

 also numerous small pedicels scattered among- the larger ones. The 

 anal aperture is without special groups of papilhe. Surrounding the 

 tentacles there is a slight ridge with pedicels and papillae, but it 

 apparently did not form a collar Ijefore contraction. 



The calcareous ring- is moderately stout and of the usual form. The 

 interradial pieces are considerably smaller than the radial. Both are 

 excavated on the posterior margin. Anteriorly the interradials have 

 a single tooth, the. radials being- deeply incised. Madreporic canal 

 single, free, on the right side of the mesenter«,\ Madreporic body 

 elongate. Polian vesicle single. Gonad small. Cuviorian organs in 

 a large tuft. Left branch of respiratory tree not intimately connected 

 with intestinal vessels. 



The disks of the smaller tables have a very characteristic form, as 

 shown by fig. 3, Plate LXIX. The simplest forms have only the four 

 peripheral holes, the larger disks possessing a small perforation on 

 either side of one or more of these. The large central hole instead of 

 being circular is always cruciform. The disks are usually between 

 0.056 mm. and 0.086 mm. in diameter. The spires are low, made up 

 of four rods and one crossbeam, and a more or less circular crown 

 (which is frequently incomplete), bearing normally eight teeth (hori- 



