FEMALE. 187 



Mandibles (PL X, fig. 4), with three teeth, of which the 

 first is much larger than the second and third, and distant 

 from them : inferior angle produced and pectinated ; upper 

 edges of the second and third teeth finely pectinated. 



Maxilla (PL X, fig. 11) small, slightly but distinctly 

 indented by two notches, supporting, besides the three 

 upper great 'spines, three pairs of moderately long spines 

 and some finer ones : apodeme short, thick. 



Outer Maxilla, unusually pointed, with the inner 

 bristles not very numerous, continuously arranged ; exter- 

 nally, the bristles are longer. Olfactory orifices, tubular, 

 projecting, flattened, square on the summit, smooth : they 

 point upwards and obliquely towards each other : they 

 arise more laterally than in the other genera, namely out- 

 side the bases of the outer maxillae, and between them 

 and the inner maxillae. 



Between the bases of the first pair of cirri, there is a 

 conical prominence, clothed with bristles and coloured 

 purple : it projects nearly as high as the top of the lower 

 segment of the pedicel of the first cirrus : it lies over the 

 infra-cesophageal ganglion, and serves, I suspect, to fill up 

 a little interval between the outer maxillae. 



Cirri long, little curved : the first pair (PL IV, fig. 8 a) 

 is situated at an extraordinary distance from the second ; 

 hence its basal articulation is on a level with the upper 

 articulation of the pedicel of the second cirrus. In the 

 three posterior cirri, the segments are laterally very flat, 

 with their anterior surfaces not protuberant; each sup- 

 ports three pairs of thin, non-serrated bristles, of which 

 the second pair is much shorter than the upper, and the 

 lowest pair minute • between each pair there is a minute, 

 rectangulary projecting bristle ; dorsal tufts consist of two 

 or three spines, of which one is longer than the others. 

 The two bristles forming each pair, are not of equal 

 length ; for in the rami of each cirrus, the inner row of 

 bristles is much shorter than the outer ; and this seems 

 to be connected with the flatness of the whole animal, 

 and the consequent little power of divergence in the rami 



