144 DISCOVERY REPORTS 



a measurement of 45-50 mm. in length. In spirit about the first 30 chaetigers are 

 colourless, and behind this the back develops a greenish colour which increases in in- 

 tensity from before backwards. In some of the 

 specimens the dorsal surface of the hindmost region 

 is a greenish black interrupted by narrow light 

 green intersegmental bands. The head has about 

 nine rings and ends in four small tentacles. None 

 of the specimens has the proboscis everted. I see 

 between 15 and 20 X -shaped paragnaths and ac- 

 cording to Arwidsson the paired jaw plates each 

 T r . ^1 y r- -11 r ^1 Fig. 26. Gh'cinde armata. 



have five teeth. 1 figure some papulae from the rf ,1 r ' 1 



° ^ ^ Papulae irom proboscis. 



proboscis (Fig. 26). 



The change over from the uniramous to the biramous condition of the feet takes 

 place between the 30th and 35th chaetigers. 



In the uniramous region there is a large dorsal cirrus, a chaetal lobe with a pair of 

 conical lips of which the hinder is longer than the anterior, and a ventral cirrus a little 

 longer than the foot. In the biramous region there is a triangular dorsal cirrus, a small 

 rounded dorsal lobe, a large ventral lobe with two digitiform anterior lips, and a single 

 conical posterior lip and a triangular ventral cirrus. 



The ventral bristles are all compound with lightly denticulated end-pieces ; the dorsal 

 bristles are stout acicular bristles surmounted by a kind of plume. 



In regard to the eyes in this species, Arwidsson gives two pairs, but I can see only one 

 pair in the present specimens. 



Remarks. This species is akin to the northern G. tiordmanni, but is easily dis- 

 tinguished by the division into two lobes of the anterior lip of the ventral ramus in the 

 hinder region. This also distinguishes it from the Brazilian G. tnidtidens, F. Miiller. 



In the original description of G. pacifica, mihi, from the Panama region I gave no 

 account of the paragnaths. I have now re-examined the type and I find the usual pair 

 of large jaws, each with five teeth, and 22 X-shaped micrognaths. The dorsal bristles 

 are of the plumed acicular kind and show nothing distinctive. I suspect that further 

 material will reveal that my species is a synonym of G. multidens. 



Family SPHAERODORIDAE 

 Genus Ephesia, Rathke 



Body elongate, subcylindrical. Prostomium with four papilliform antennae. The 

 dorsal cirri consist of spherical capsules surmounted each by a small papilla. The buccal 

 segment has dorsal cirri, but is achaetous. The feet are uniramous with either simple or 

 compound bristles. A large ventral papilla takes the place of the ventral cirrus. The 

 proboscis is cylindrical and unarmed. The pygidium has two spherical capsules. There 

 is no striated gizzard. 



