199 



shape of the calcareous deposits is rather characteristic of the 

 species. The specimen from Doe Roa is in most characters very like 

 the- other two specimens, but there are many but very faint diffe- 

 rences indicating that it is probably another species. Still, as the 

 specimen is less well preserved and the differences are so slight, I 

 have referred it to lactea and not described it as an independent 

 form. 



Synaptula ostergveni n. sp. 



The China Sea. 20° N, 114° E. On Sea-weed. Koch. 11 specimens. 



The specimens at hand measure 1 — 4 cm in length by 0,3 cm 

 in diameter. They are quite colourless and the body-wall is thin 

 and translucent. They have 10 tentacles, each with 16 — 20 pairs 

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

 The calcareous ring is pure white, and consists of 10 pieces of 

 nearly equal size and shape. The radiais are perforated for the 

 nerves. The cartilaginous ring is faintly developed, quite translucent 

 and has distinct "tentacle-canals" (Fig. 27. 10). There are eight polian 

 vesicles of varying size and a single stone-canal. The gonads are 

 weakly developed, but distinctly branched. The intestine has a loop 

 and on the mesenteries there are ciliated funnels of the usual size 

 and shape. 



The anchors (Fig. 27. 7) measure ca. 150 // in length and 100 fi 

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

 minute knobs. The anchor-plates (Fig. 27. 8) measure ca. 130 // in 

 length and 1 10 p in width. The articular hole as well as the bridge 

 are quite smooth, and in the posterior end of the plate there are 

 three small holes. The miliary granules (Fig. 27. 9) are partly dis- 

 solved circles of minute granules. 



This species is apparently not closely related to any of the other 

 species, but as all the specimens at hand are rather small, juvenile 

 ones, it is not beyond doubt that it will not prove to be closely 

 related to, or even identical with one of the other and better known 

 species. Still as all the specimens are rather alike, and it is not 

 possible to refer them to any known species, I think it the 

 better course for the present to describe them as an independent 

 species. 



