It is again with considerable hesitation that this form is identified with Kwietniewski's 

 its dimensions and the fact that it was taken in the same locality being the date 

 upon which the identification is based. The possibility <>l its being a young individual «'t i 

 is not excluded, although it seems improbable 



rianthus n. sp. 



St.it. 85. Lat. >., long. 119 2 ('.5 I , Makassar Strait. 724 metres. 1 ex. 



General Form. The column is cylindrical (PI. I, fig. 3), enlarging slightly near 



the margin but not tapering t<> any marked degree toward the rounded aboral pole. The 

 marginal tentacles are relatively short and slender, and appear to be arranged in only two 



their formula being 



2, \ , 2. \ ! 2,1.2.1 2,1.2, 1.2.1,2 1,2.1.2 | 1,2.1,2 — . 



The oral tentacles are al most the same length as the marginals, except the median one, which 

 i> very much smaller than the rest. They are arranged in four cycles, their formula being 



'. 2, 4, 3 1.2. 4, 3 | 1, 3, 4, 2, 4, 3. 1 3, 4, 2, 1 | 3, 4, 2, 1 — . 



In addition to the seven protocnemic oral tentacles there were also five quartettes on eitber 

 side of the middle line, as well as some additional tentacles, possibly an additional (iitartette, 

 so that the total number of oral tentacles was not far from 55 and the number of the marginals 

 the same. 



Dimensions. — Length of the column 6.0 cm.; diameter at about the middle of its 

 length 0.6 cm.: diameter at the margin 0.9 cm. Length of the marginal tentacles 0.7 cm.; 

 length of the oral tentacles about the same. 



1 olour. The column, in the single example preserved in formalin, was colourless 



throughout the greater part of its extent, becoming, however, purple-brown toward the margin. 

 Both the oral and marginal tentacles were colourless while the disc and stomatodseum were 

 of a pale chocdlate-brown colour. 



Structure. I am not able to give a full account of the structure of this form. 



1 he musculature of the column wall is well developed and the stomatod. rum was about o.S cm. 

 in length, the measurement being taken a little to one side of the siphonoglyph, which is. 

 however, but slightly i ed. The most striking feature observed on laying open the column 



longitudinally was the smoothness of the lower 2.5 cm. of the column wall, none of the mesent- 

 eries, not even a pair of telocnemes, extending to the aboral pole or even to its vicinity. 



il important points regarding the arrangement of the mesenteries must be left 



rtain, owing to an unfortunate error having occurred in making preparations of the single 



t the sp thi collection. It is certain, however, that the mesenteries were 



ly sterile and fertile, that is to say, that brachyenemes and macrocnemes alternate, and 



furthi there were strong indications that the deuterocnemes showed the quartette arrange- 



\ but what the sequence in each quartette was I could not determine. It may be said, 



30 



