NO. 1555. HAWAIIAN HOLOTHVRIANS— FISHER. . 695 



contracted, and are surrounded by a narrow rim or collar independent 

 of the papillaj and ver}' inconspicuous. The crowns of the tentacles 

 remind one of miniature cauliflowers. Pedicels of mid-ventral radius 

 are usuall}^ retracted flush with level of perisome so that it is diflicult 

 to get an idea of their size. They are not exactly paired, but seem to 

 alternate in the two rows. Between the anterior end of these series and 

 the mouth I was able to discern, in one specimen, three x)r four widely 

 separated, much smaller pedicels which seemed to continue the two 

 series. The larger pedicels are about 8 mm. apart and the two series 

 about 6 mm. Pedicels of lateral radii are wholly ventral in position 

 and appear to increase in size as they proceed forward. In the only 

 specimen in which they are at all expanded they appear to spring from 

 a rather fleshy base, are about 6 mm. long, and appear larger than 

 mid- ventral pedicels. As noted in the diagnosis this series does not 

 extend farther forward than middle of body. Separated from the 

 pedicels by about 6 or 7 mm. is the continuous series of numerous 

 papilla:* which form a border completely around l)ody, but well marked 

 only in the anterior and posterior portions. This border is very deli- 

 cate and has been scraped ofl' of the majority of specimens along sides 

 of bod3^ The only ambulacral appendages, therefore, on the lateral 

 radii in anterior half of body are the papilla?. These are more numer- 

 ous in the posterior half than the adjacent pedicels, are slender, and 

 not particularly conspicuous. In vicinity of mouth the papillfe are 

 about 10 to 12 mm. long, purple in color, and two or three appear 

 often to spring from a common base, although this appearance may be 

 due to injur3\ Papilla3 along sides of body are verv numerous, but 

 on account of frequent imperfections it is impossible to ascertain exact 

 numbers. It must be remembered that these papillse do not form 

 along the edge of the body such a conspicuous rim as is present in 

 P. confunde7}S. In fact, a brim is apparent only at the two extremi- 

 ties. Neither can the mouth with tentacles be retracted as is appar- 

 entl}^ the case with confundevs. The longest dorsal papilla near ante- 

 rior end of body is 18 mm. and very slender. The papilla? appear to 

 decrease in size as they proceed caudad, 



No calcareous ring. Madreporic canal single, in dorsal mesentery. 

 No free tentacle ampulhe. Polian vesicles two, of about equal length, 

 40 mm. long; in one specimen of somewhat unequal length. Tissue 

 between ring canal and base of tentacles dotted with purple. Gonad 

 in two tufts, the tubules once dichotomously branched. Intestine 

 with a large, lobed, fleshj'^ diverticulum about 25 mm. behind ring 

 canal. Respiratory tree very large, the right branch when perfect 

 reaching as far forward as ring canal. The tube is large and the side 

 ])ranches, which are scattered along its whole length, have also rather 

 wide tubes, ending in more finely branched dendritic vesicles. The 

 left tree is not quite half so long as the right, but is much more intri- 



