194 



there are minute knobs. The anchor-plates (Fig. 25. 6) measure 

 ca. 170 fi in length and 140 /n in width. The articular hole is 

 usually smooth, and on the bridge there are faint knobs. In the 

 posterior end of the plates there are constantly nine holes, the 

 central one of which, is the largest. The miliary granules (Fig. 

 25. 8) are rosettes. 



This species is in several respects very like reticulata, but the 

 peculiar colour and the shape of the anchors and anchor-plates 

 (especially that of the articular end) separate it so much from this 

 species that they are easily separated. 



Synaptula purpurea n. sp. 



Banda. 5.VI.1922. Ca. 20 m. Sand, sponges. 1 specimen. 



The specimen at hand measures 3 cm in length. The colour 

 is purplish-brown with faint white stripes due to heaps of miliary 

 granules. The tentacles are bright yellow and for this reason very 

 different from the body. There are 10 tentacles, each with ca. 15 

 pairs of digits united by a web. On the oral disk there are eye- 

 spots. The cartilaginous ring is as in lamperti well developed, with 

 large perforations close to the circular canal. The calcareous ring 

 (Fig. 25. 5) is pure white and has large muscular impressions. The 

 radiais are perforated for the nerves. There are eight polian vesicles 

 and a single stone-canal. The gonads are branched and the intestine 

 has a large loop. On the mesenteries there are ciliated funnels of 

 the usual size and shape. 



The anchors (Fig. 25. 9) measure ca. 200 in length and 130 

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

 are minute knohs. The anchor-plates (Fig. 25. 10) measure ca. 150 

 li in length and 130 in width. The articular hole is smooth 

 and the thick bridge is usually smooth. In the posterior end of 

 the plates there are 6 — 8 small holes. The miliary granules (Fig. 

 25. 11) are small rosettes, which are unusually thick. 



This species is the most closely related to reticulata and lamperti, 

 but it differs distinctly from these latter in the tentacles being 

 yellow, in the shape of the calcareous ring, and in that of the 

 calcareous deposits. 



