169 



Synaptula albolineata n. sp. 



Banda. 5. V. 1922. The shore at low-water mark. 1 specimen. 



The specimen at hand measures ca. 21 cm in length and ca. 

 1,5 cm in diameter. The colour is exceedingly characteristic (Pl. II 

 fig. 4) as it is greenish-grey with five pure white stripes in the 

 ambulacra, due to abundance of miliary granules. The tentacles are 

 as the body greenish-grey, but instead of the white stripes they 

 have more or less regular white rings. There are 13 ten acles, each 

 with 28 — 30 pairs of free digits. The eyes are very small and only 

 visible on preparation. The cartilaginous ring is very large and 

 encloses the calcareous ring. Close to the circular canal there are 

 large perforations, but no tentacle canals as in virgata cfr. pag. 174. 



Fig. 18. Pieces of calcareous ring from Synaptula alba (1) and 

 Synaptula albolineata (2). X 24. 



The calcareous ring (Fig. 18. 2) is clear green with a pure white 

 stripe on the limit of each two adjacent pieces. The radiais are 

 perforated for the nerves. The muscular impressions on the exterior 

 side of the calcareous ring are distinct. There are 18 polian vesicles, 

 four of which are very large. The single stone-canal has a large 

 madreporite, prolongated along the one side of it. The gonads are 

 very long and several times branched. The three parts of the ali- 

 mentary canal are distinctly different and the intestine has a large 

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

 size and shape. 



The anchors and plates from the posterior end of body are not 

 much different from those more anteriorly, but all over the body 

 there are two different sorts. The large anchors (Fig. 19. 1) measure 

 ca. 320 jLi in length by 200 fi in width and the smaller ones (Fig. 

 19. 2) but ca. 200 [i in length by ca. 120 fi in width. The two 

 sizes of anchors are quite alike, with the stock finely dented and 

 with minute knobs on the vertex. The large anchor-plates (Fig. 19. 3) 



