180 



developed, thin and branched, and the alimentary canal has a large 

 loop. On the mesenteries there are ciliated funnels of the usual 

 shape and size. 



The anchors and anchor-plates are not different in the two ends 

 of body, but in each end there are two different sorts. The large 

 anchors (Fig. 22. 5) measure ca. 260 jti in length and 150 fi in width; 

 the small anchors (Fig. 22. 7) measure ca. 140 fi in length and 80 jti 

 in width. The stock is finely dented and on the vertex there are some 

 minute knobs. The large anchor-plates (Fig. 22. 6) measure ca. 180^ 

 in length and 130 ft in width, the small plates (Fig. 22. 8) ca. 110^ 

 in length and 100 in width. The plates are much alike, with a 

 nearly smooth bridge and three small holes in the posterior end, 

 but the articular hole has in the large plates the anterior margin 

 serrate; in the small plates it is usually smooth. The miliary gra- 

 nules (Fig. 22. 10) are rosettes which are gathered in the white 

 spots. 



This species is the closest related to denticulata, from which it 

 differs in having two different sizes of anchors and plates, in the 

 length of the madreporite and in the shape of the calcareous ring. 



Sy nap tula neirensis n. sp. 



Off Neira, Banda. 5. VI. 1922. Ca. 10 m. Sand. One specimen. 



The specimen at hand measures but 2 cm in length. The colour 

 is uniformly pale violet. It has 13 tentacles, each with 5 — 6 pairs 

 of digits, which are united by a web. Eye-spots are present on the 

 oral disk. The cartilaginous ring is distinct, close to the calcareous 

 ring, but in its posterior part it is reduced to "tentacle-canals". The 

 calcareous ring (Fig. 22. 18) is pure white and on its exterior side 

 there are distinct muscular impressions. All the pieces are notched 

 in the posterior margin and the radiais are perforated for the nerves. 

 There are 5 polian vesicles and a single stone-canal. The gonads 

 are faintly developed, but three times branched. The intestine has 

 a loop and on the mesenteries there are ciliated funnels of the 

 usual size and shape. 



The calcareous deposits are peculiarly formed and different from 

 the deposits in all other species of Synaptula. The anchors from 

 the posterior end of body (Fig. 22. 13) measure ca. 190 /a in length 

 and 110 ^ in width, and those from the anterior end (Fig. 22. 12) 



