FKOM THE GULF OF GUINEA. 55 



pair considerably narrowed at the base. The fifth pair is simple, consisting^ of one short 

 3-jointcd branch, which terminates in a small spine, and one very long" and slender 

 branch, composed of four nearly equal parts, and bearing a ciliate digitiform process and 

 a number of short sette at the apex. Abdomen short, tlie first segment rather narrower 

 than tlie next ; the last is very small. The caudal stylets are also very short and somewhat 

 divergent (PI. IV. fig. 4). 



Habitat. Lat. 1° 55' 5" N., long. 5^ 55' 5'' E., in a tow-net gathering from 35 fiithoms, 

 collected January 22nd. Only one specimen of this curious form Avas obtained. 



Amallophora magna, n. sp. (PI. IV. figs. 5-9.) 



Female. Length about 4"5 mm. (2-lltlis of an inch). Body robust, attenuated towards 

 the front, tlic first segment equal to the entire length of the other body-segments and 

 abdomen; head produced into a distinct though small median keel, which passes round 

 over the forehead (fig. 31). The postero-lateral angles of the last thoracic segment are 

 produced ventrally into a small tooth. Anterior foot-jaws small; four of the marginal lobes 

 are furnished with long terminal plumose setae, while the other forms the l)asc of a long 

 setose spine; several small sensory filaments, some of which have rounded licads, spring 

 from the extremity of the foot-jaw, as shown in fig. 0. The other mouth-organs and 

 swimming-feet are similar to those in Scolec'dhrLv Daiicv, except that the large terminal 

 spines of the swimming-feet are strongly toothed on the outer margin. Tlie fifth pair 

 are very small, simple, 2-jointed; the second joint is nearly twice the length of the 

 other and provided with one terminal and two submarginal setoe ; the terminal and one 

 of the submarginal sette are long and slender, the other is very short (fig. 9). Abdomen 

 short. 



Kahltat. Off Sao Thome Island, 20 fathoms, January 23rd (day collection). 



One specimen only of this curious form was obtained ; it wanted a considerable portion 

 of the anterior antennae and part of the abdomen, but, though thus mutilated, the peculiar 

 structure of the anterior foot-jaws and the large, strongly-toothed, terminal spines of the 

 swimming-feet, together with the large size of the animal, readily distinguish this from 

 allied species. No males were observed. 



Amallophoea dttbia, n. sp. (PI. IV. figs. 10-18.) 



Mule. Length 2-5 mm. (1-lOth of an inch). In this species the first cephalothoracic 

 segment is nearly equal to the entire length of the other three body-segments and the 

 abdomen. Anterior antennse about as long as the cephalothorax ; the right antenna is 

 18-, the left 23-jointed ; in the right antenna, which is indistinctly geniculate at 

 the proximal half (fig. 11), the seventh joint is composed of five and the fifteenth, of 

 two coalesced joints; the first thirteen joints of the left antenna and the corresponding 

 joints of the right have a row of elongate setae along the upper margin, each of which 

 is fvu'nished with a membrane-like unilateral expansion or fringe as shown in the figure, 

 but the remaining portion of the antenna? is only sparingly setiferous. The annexed 

 formula shows the proportional lengths of the right and left antennce : — 



