230 



Leptosynapta irregularis n. sp. 



Port Jackson. 20. X. 1914. Rocky shore. 11 specimens. 



The specimens at hand are rather large. They measure up to 

 17 cm in length. Their colour is pale brownish and darkest close 

 to the tentacles. The brown colour is due to small brown warts 

 which are densest (probably not only due to contraction) in the 

 anterior end of body. There are twelve tentacles which measure 

 up to 0,8 cm in length. Each tentacle has 7 — 8 pairs of digits 

 and 8 — 14 sensory cups. Eye-spots are wanting. The calcareous 

 ring (Fig. 39. 5) is well developed and the radiais are perforated 

 for the nerves. A cartilaginous ring is wanting. There are three 

 polian vesicles and a single unbranched stone-canal. The alimentary 

 canal is straight and the oesophagus is different from the intestine. 

 The ciliated funnels are fan-shaped and found on the body-wall. 

 The gonads are branched and the genital duct opens on a low wart, 

 close behind the dorsal tentacles. 



The anchors and anchor-plates are very varying in shape and 

 usually irregularly formed. The anchors from the posterior end of 

 body (Fig. 38. 1-2) measure ca. 250 [a in length and 130 fi in width. 

 The arms are rather long and distinctly serrate. Some of the an- 

 chors differ from the normal ones in having the arms bent out- 

 wards. The anchors in the anterior end of body (Fig. 38. 3-4) 

 measure ca. 200 /n in length and 100 jti in width. The arms are 

 also here serrate, but there are seldom more than 3 — 4 teeth. 

 Also in this end of body the anchors may have the arms bent 

 outwards. The anchor-plates (Fig. 38. 5-6) measure ca. 150 ^ in 

 length. Their outline is very irregular and in the anterior end of 

 the plates there are usually several additional holes which are more 

 or less toothed. The plates from the posterior end of body have 

 usually more additional holes than the plates in the anterior end. 

 One of the specimens examined differs from the others in having 

 the outline of the anchor-plates more regular, and in having fewer, 

 very rarely none, additional holes in the anterior end of the plates 

 (Fig. 38. 7-9). The miliary granules are in the posterior end of 

 body more or less C-shaped (Fig. 39. 3) and in the anterior end 

 of body often ring-shaped (Fig. 39. 4). The rods in the tentacles 

 (Fig. 39. 2) are rather like those in the body, only they are some- 

 what larger and their shape more irregular. The rods in the digits 



