BY WILLIAM A. HASWELL. M.A., B.SC. 669 



so in each thoracic notopodium. The dorsal setse of the abdomen 

 are long and slender hairs. The pectines, which are about 2 ^th 

 of an inch in length, are about fifteen in number in each segment 

 of the thorax ; in the abdomen they are much more numerous ; 

 the}' have four or five teetb, one of which is considerably larger 

 than the others. 



In colour the anterior or thoracic region is scarlet, specially 

 bright on the lateral flaps and the collarette. The bases of the 

 branchire are crimson ; the stems are light green and yellow with 

 narrow longitudinal lines of red and transverse lines of white. 

 The operculum is almost colourless, the peduncle light red, the 

 abdomen reddish. 



This species occurs along with Pomatoceros elaplius, in Port 

 Jackson. 



10. Sekptjla Jukesii. 



Surpirta Jukesii, Baied, l.c. p. 20, pi. II., fig. 6. 



" Branchiae in spiram unam convolute, lactese, filamentis dorso 

 canaliculars. Operculum et filamentum operculigerum alba. 

 Operculum profunde infundibulatum, multicrenatum. Tubus 

 teres, solidus." (Baird.) 



" Seas of Australia." [Brit. Mus.] 



It is possible that this may be identical with the Port Jackson 

 species described above, but in the figure of the operculum 

 given in Baird's paper the ribs are much more numerous than 

 in the Port Jackson species, and the description of other parts is 

 insufficient for certain identification. 



11. SALMACINA AUSTRALIS. N. Sp. 



[Plate, XXXIII. , figs. 7-11.] 

 This extremely minute species is found in little clusters on the 

 under surfaces of large stones between tide-marks in Port 

 Jackson. The tubes are cylindrical and twisted, intertwining with 

 one another to form tolerably dense masses. 



The body of the animal is only about a sixteenth of an inch in 

 total length. The abdominal and thoracic regions of tbe body are 

 44 



