122 APHRODITACEJS. 



superior and small. Mouth inferior, provided with a firm cartilagi- 

 nous proboscis armed with two pairs of jaws similar to those of the 

 Sigalion, but the orifice appears to be plain. Body with about forty- 

 pairs of feet, which seem to be all alike and destitute of tentacular 

 cirri, but we find two minute fleshy papillae near their bases on both 

 the dorsal and ventral sides. The feet are not distinctly divided 

 into two branches, but there is a fleshy fold behind the apex, and 

 within which the apex can be retracted. From this fold there 

 originate two bundles of simple bristles, one dorsal and the other 

 ventral, the bristles short ; the apex itself is armed with a bundle of 

 compound bristles, jointed near the point, and fashioned like those 

 of a Polynoe ; to each brush of bristles there is a conical spine 

 placed in the centre of the brush. The back of the worm is partially 

 covered with a row of scales placed over the bases of the feet down 

 each side, but the middle of the back is naked. There are fourteen 

 ]>airs of scales, some of them round, others oval, all spinous on the 

 outer edge, smooth, raised in the centre. Belly smooth, flesh- 

 coloured. Posterior extremity without styles. 



Plate V. Fig. 1. PAoZoe iworHa/a of the natural size. 2. The anterior 

 portion of the body, magnified. 3. The proboscis laid open, magni- 

 fied. 4. Two of the dorsal scales. 5. The foot. 



2. Ph. eximia, scales twenty -six pairs, imbricate, covering the back, 

 reniform, spinous on the posterior edge ; eyes two ; anal styles 

 prolonged. Length 6'". 



Pholoe eximia, F. J). Dyster in litt. 

 Hab. Tenby, Frederic D. Brjster, Esq. 



Desc. " Body about half an inch long, attenuated slightly towards 

 the tail, which is obtuse. Scales twenty-six pairs, the second and 

 twelfth inclusive marked with a dark irregular spot about the centre, 

 reniform, armed with from six to ten stout hairs, which, from the 

 twelfth pair of scales to the tail, extend towards the middle of the 

 back, and give the worm a spinous appearance. Scales covering the 

 back. Segments thirty-seven ; the first pair of scales attached to 

 the first segment, the eleven next to alternate segments, the fourteen 

 last to every segment. Antennae five, of about equal length, the 

 median and external rather stouter than the internal pair. Ocular 

 spots two. Tentacular cirri very thick at the base, and about four 

 times the length of the antennae, ringed. Tail terminated with two 

 long subulate styles. Proboscis cylindrical, three times as long as 

 broad ; no appendages at the orifice. Jaws four, incurved, not 

 denticulated. Dorsal bristles very slender, short, finely denticulated, 

 disposed in a fan-like bunch. Ventral bristles much longer and 

 thicker, the terminal joint slightly incurved, very finely denticulated 

 both on the terminal joint and on the anterior portion of the summit 

 of the shaft. Ventral setiferous tubercle large and well developed ; 

 the dorsal very small and uiconspicuous." — F. D. Dyster. 



