186 DE. BAIKD ON THE APHBODITACEAN ANNELIDES. 



greyish on the back, and yellow underneath. Head, antennae, 

 and palpi much the same as in preceding species (i. stellatus). 

 The bristles of the ventral branch are not bidentate at the point, 

 but are more loosely or longly toothed or serrated below the apex. 

 The bristles of the dorsal branch are slender, and finely serrated 

 and striated across. The elytra are 12 pairs in number, the upper 

 ones nearly round, becoming more ovate as they descend. When 

 seen by the microscope, the surface is covered over with very 

 minute granulations, and the external margin is densely ciliated. 

 They are of a light colour, but speckled all over with light fawn- 

 coloured spots. 



Sab. Australia (Mus. Brit.). 



For a specimen of this species we are indebted to Dr. Bower- 

 bank, who received it from the Australian seas. 



Grenus II. Halostdna, Kinberg, I. c. 384. 



Bases of antennae produced from the anterior margin of the 

 cephalic lobe ; elytra from 15 to 35 pairs (15 to 21, Kinberg) 

 not covering the whole of the back ; body long. 



Sp. 1. Halostdna beeyisetosa, Kinberg, I. c. 385, and Fregatt. 

 Eugen. JResa, p. 18, tab. 5. figs. 25, 25 A-25 h. 



Hab. Coast of California, Kinberg, Cuming {Ifus. Brit.) . 



This is a very pretty species, and we are indebted to Mr. 

 Cuming for our specimens. 



Sp. 2. Halosydna viegini, Kinberg, I.e. 384, Fregatt. JEugen. 

 Bern, p. 15, tab. 5. figs. 20, 20 a-20 h, tab. 10. fig. 53. 

 Hab. Honolulu, Sandwich Islands, Kinberg. 



Sp. 3. Halostdna aitstealis, Kinberg, I. c. 385, and Fregatt. 

 Eugen. Besa, p. 16, tab. 5. figs. 21, 21 A-21 h, tab. 10. fig. 54. 

 Hab. Mouth of the Biver Plate, South America, Kinberg. 



Sp. 4. Halostdna patagonica, Kinberg, I. c. 385, and Fregatt. 

 Eugen. Besa, p. 17, tab. 5. figs. 23, 23 A-23 H. 

 Hab. York Bay, Straits of Magellan, Kinberg. 



Sp. 5. Halostdna paeva, Kinberg, I. c. 385, and Fregatt. Eugen. 

 Besa, p. 17, tab. 5. figs. 24, 24 a-24 h. 

 Hab. Valparaiso ; Chincha Islands ; San Lorenzo, near Callao, 

 Kinberg. 



Sp. 6. Halosvdna BEASiLiEisrsis, Kinberg, Fregatt. Eugen. Besa, 

 p. 16, tab. 5. figs. 22, 22 a-22 h. 

 Hab. Bio Janeiro, Kinberg. 



