631 ox SOME XEW AUSTEALTAN TUBICOLOUS AXXELIDS, 



from the third segment bac]£\^ards hj a close plexus of p?eudo- 

 hfemalvesselsf which undergo synchronous peristaltic contractions 

 passing from before backwards. 



This species is exceedingly common in Port Jackson under 

 stones near the upper tide limits. One specimen was observed 

 in the act of swallowing a small Isopod. 



Clymene integrinatis, sj). n. (Plate XII., figs. 3 — G.) 



The head is amalgamated with the buccal segment. The mouth 



is surrounded by a thickened lip. The upper surface of the head 



presents a low longitudinal ridge, The first three segments are 



devoid of hooklets, but possess simple set8B placed on slight lateral 



projections. The last three segments are without either hooked 



or simple seise ; the last has an oval concave terminal disk i of an 



inch in long {i.e. dorso- ventral) diameter, and a little less in the 



transverse direction, wdth an entire margin except for a slight 



notch in the middle of the ventral border. The anus is situated 



near the middle of the terminal disk, but rather nearer the ventral 



than the dorsal aspect; it is key-hole-shaped and is surrounded 



by a number of minute, short, radiating ridges. The simple seta? 



are free from serrations or teeth ; the uncini have usually five 



accessory teeth. 



This species is not rare among sand and shingle in some parts 

 of the shores of Port Jackson. The absence of crenulations 

 on the borders of the terminal disk separates it from most species 

 of the genus with the exception of 0. urceolafa, Leidy, from the 

 Atlantic coast of the United States. 



Sabellaria (Hermellaaustraliensis), s/?. n. (Plate XII., f. 7 — 11.) 



The total length of the animal is about an inch and a half ; 

 that of the head -L^ths of an inch, and that of the "tail " about 



t In the European si^ecies this has been described as a peri-intestinal 

 Binns. 



