360 
THE VOYAGE OF H.M.S, CHALLENGEK. 
The cirri on the posterior feet seem to he somewhat longer. The spikes on the inner 
edge of the forks of the bristles (PL XXIIa. fig. 21) are smaller, the inferior Inistles 
showing the latter feature better than the superior. Both British ami foreign bristles 
have unequal limbs to the fork. 
The curved bodies observed in the lamellae of the feet are probably homologous with 
those described by Kolliker and Greeff in Ephesia [Sphcerodorum). 
The intestine is distended with sandy mud, amongst which are spicules of sponges, 
Foraminifera, and small Gregarinae, the latter being probably parasitic in the Annelid. 
In transverse section the body- wall posteriorly agrees with the structure in Scali- 
hregma injlatmn, the nerve-cords lying outside the circular muscular coat, and having 
externally the hyj^oderm and cuticle. The oblique muscles meet in the middle line 
above the circular coat. 
Eumenia, (Brsted. 
Eumenia reticulata, n. sp. (PI. XLIV. figs. 1,2; PI. XXIIa. fig. 20). 
Habitat . — Trawled at Station 168, Queen Charlotte Sound, New Zealand, July 8, 
1874; lat 40° 28' S., long. 177° 43' E.; depth, 1100 fathoms ; bottom temperature 37°'2, 
surface temperature 57°‘2 ; sea-bottom, blue mud. 
The longest example is 19 mm., and aliout 3 mm. in diameter at its anterior 
wide part. 
The body is elongate, inflated anteriorly, and diminishes towards the posterior 
extremity. The segments are about thirty-four in number. 
The head is small, truncated anteriorl}^, and with two short tentacles at the sides, 
indeed, the description given by authors of other sjDecies answers very well for this 
form. The proboscis is extruded in all the specimens, and is subglobose. Only a 
single example is complete, and in this the anus shows no appendages. There are no 
visible branchiae. 
Fourteen of the anterior feet are sessile. In the rest the bristles are situated on 
slightly projecting lamellae, somewhat like Theel’s Eumenia longisetosa. The latter 
author observes that only ten of the anterior feet are devoid of lamellae, whereas 
in the Challeno’er form it is the fifteenth Ijristled foot that first shows the dorsal 
O 
lamella. 
The condition of the specimens is adverse to minute descri]3tion, since the feet are 
frayed and injured, l3ut they agree closely with the above-mentioned Eumenia longi- 
setosa. The forked Inistles (PI. XXIIa. fig. 20), however, differ consideral dy from Theel’s 
