200 



Synaptula minima n. sp. 



The Kei Islands. Off Doe Roa. 18. IV. 1922. Ca. 40 m. Sand. One 

 specimen. 



The single specimen at hand does not measure more than 1 cm 

 in length. The colour is grey with 4 — 5 faint purple stripes in each 

 interambulacrum. The tentacles are brown. There are 10 tentacles, 

 each with 6 pairs of digits. The digits are, as far as can be seen, 

 not united by a web, but as the tentacles are much contracted, this 

 cannot be stated with certainty. On the oral disk there are faint 

 eye-spots. The calcareous ring consist of 10 pieces which, as in 

 ostergreni, are of nearly equal size and shape. The radiais are per- 

 forated for the nerves. The cartilaginous ring is very faint (or 

 quite wanting). There are three polian vesicles and a single stone- 

 canal. The gonads are faintly developed, but distinctly branched. 

 The intestine has a large loop and on the mesenteries there are 

 ciliated funnels of the usual size and shape. 



The anchors (Fig. 27. 11) are ca. 135 ^ long and 75 ^ wide. 

 The flukes are rather short and thick, and on the vertex there are 

 some few minute knobs. The stock is, as in the other species, finely 

 dented. The plates (Fig. 27. 12) measure ca. 125 m in length and 

 125 /< in width. The articular hole has the anterior margin serrate, 

 and on the bridge there are some few teeth. In the posterior end 

 of the plates there is but a single hole. The miliary granules (Fig. 

 27. 13) are circles of minute granules. 



This species is as ostergreni based on a very young specimen, 

 and the validity of it is for that reason not beyond doubt. But as 

 it differs so much from all the other species known in the size and 

 shape of the calcareous deposits, I prefer to describe it as an 

 independent species. 



Synaptula ater n. sp. 



Toeal. 25. III. 1922. 1 — 2 m. Rocky wall with sponges. 1 fragment. 



The fragment in hand is in the exterior so characteristic, that 

 it is easily separated from all other species of Synaptula. It meas- 

 ures 16 cm in length, and the colour (Pl. II fig. 5) is dark violet 

 with white stripes, one in each ambulacrum. The anterior end with 

 the tentacles, the calcareous ring and the polian vesicles are want- 

 ing. The posterior end of the branched gonads is present. The 



