102 ai;t. II. — A. i/UKA : 



boars a tuft of inconspicuous bristles wliicli. urc tlircctcd (lowuwMi'd 

 ratlicr tlian outward. Tbc ventral cirri and sctigcrous loljcs of 

 tbc four pairs of parajjodia diniinisb in size from before backward, 

 but tbc dorsal cirri do not alter niucli. Tlie latter are tbick, 

 knife- sliaped processes of a moderate lengtb. Tlie setigerous lobe 

 bears posteriorly an elongated conical process, wbicb also dimi- 

 nislies in size from before backwai'd. The ventral cirrus is some- 

 what conical, and ceases to exist outside of the region. Each 

 setigerous lobe bears two or three stout acicula on the convex 

 margin of tbe tuft, followed by a series of rather short bilid 

 Ijristles, the terminal hook of these being a little longer than tbe 

 one below it. The entire extremity is guarded. 



The next region of the body commences at the fifth segment, 

 and is characterised by the elongation of dorsal cirrus, and by 

 the conversion of ventral cirrus into a flattened glandular scute. 

 The first scute is the smallest, and from the second jjosteriorly 

 the scutes rapidly increase in size, so that between the fourtli 

 and the tenth segment they attain maximum size, but a^ain to di- 

 minish somewhat in size posteriorly. 



The thirtieth parapodium shows a branchial process of two 

 divisions, and the dorsal cirrus is very attenuate. At the fortieth 

 parapodium the branchia lias four lateral Ijranches, and at the 

 base it is thicker than the dorsal cirrus, wbich now appears as a 

 small appendage of tbe branchia. 



Dental apparatus brownish in colour. Anterior part of 

 ]uaxillae strongly cur\ed, its posterior appendage short and broad 

 with a median notch posteriorly. Both right and left great dental 

 plate witli 10 teeth each, the left unpaired plate with 1) teetli. 

 The left latei-al }»late with 11 teetli, and the right with 12 

 teeth. Two accessory plates uccur on eac^li side. 



