90 Mr. P. W. Bassett-Smith on 



consists of two joints, the first having a minute hair on the 

 outer side, the last with three small terminal ones. Placed a 

 little more backward on the posterior outer angle of the 

 thoracic segment are found the second pair of limbs, more 

 distinctly visible than the first, being larger, the basal joint 

 being strongly lobed, giving off two branches, each of two 

 small joints, ending with a strong bristle. The next two 

 limbs are rudimentary, the third being placed about one third 

 down the side of the genital segment, in the form of an elon- 

 gated tubercle terminating in three simple bristles. Two 

 thirds down is seen the fourth pair of like character, but 

 rather smaller. 

 Length 3 millim. 



LerxuBopodidsB. 



Brachiella, Cuv. 



Brachiella multijimbriata, sp. n. (PI. VI. fig. 2.) 



This animal does not appear to correspond with any yet 

 described ; in outward form it is so characteristic, I venture 

 here to describe it as a new species. 



On a large Serranus at Muscat I found one of these 

 attached to the inside of the operculum ; but on opening the 

 mouth the lips, tongue, palate, and cheeks were seen to be 

 thickly studded with them, especially the inner fold of the 

 lower lip ; they were attached so firmly that the mucous 

 membrane had to be cut away with them. Afterwards on 

 careful examination of these I was disappointed to find only 

 one pigmy male; this minute creature was hooked on to the 

 cephalic portion of a female, as shown in PI. VI. fig. 2 a. I 

 only succeeded in making a rough drawing of this, unfortu- 

 nately losing the specimen while preparing it for mounting ; 

 it shows, however, distinctly the Brachiella form. 



Female. — Colour pale, translucent, except for the ovaries 

 and ovarian sacs, which are opaque white. Head and neck 

 generally recurved forwards, equal very nearly in length to 

 that of the genital segment. Arms of attachment (second 

 maxilliptds) placed close to the latter, distinctly separated 

 from one another in the middle portion, not quite equal in 

 length to the neck ; organ of adhesion a sucking-disk (as 

 distinct from the drill usually found in Anchorella). 



Genital segment : this from the back appears as an irre- 

 gular elongated hexagon with concave sides, giving off from 

 each of the two lateral points four filiform semitransparent 

 processes ; from the posterior angle on each side of a short 



