fuu/ul amouyst the (Julf-weed. 75 



stinct ones on its inferior edge near the tip. Two spines on each 

 side of the carapace near or on the anterior edge. Middle ))late 

 of the tail with three obsolete spines on each side and two long 

 spines from the extremity. 



Descrijjtion. — The whole animal of a yellow colour ; rather 

 more than an inch in length and very robust. Rostrum about 

 the same length as the peduncular scales of external antenna?, 

 lanceolate, being rounded and narrowed at the base and dilated 

 near the extremity before ending in a point. The peduncular 

 portion of the superior antenn;c l-jointed, the basal joint being 

 large and hollowed out suj)criorly for the reception of the eyes ; 

 each t)f the segments of the peduncle end externally and ante- 

 riorly in a spine which projects forwards and outwards. The 

 outermost of the three terminal tilaments is the thickest. The 

 peduncular scale of the external antennfc does not terminate in a 

 point, but is obliquely truncated ; the terminal filament is longer 

 than those of the superior antennae. First pair of legs very 

 slender, reaching a little beyond the peduncle of external antennae, 

 didactyle. Second paii- much stronger, and although the first 

 four joints are delicate, the hand is large and ovate, didactyle; 

 claws slender and almost straight. The last pair of legs slender. 



4. Amphitoe pelagica. PI. VII. fig, 4. 



A. with peduncle of superior antennse about half the length of 

 the inferior antennae, being almost the same length as the first 

 three joints of the peduncle of the lower antennae. First paii- of 

 legs small, second pair ^A-ith the wrist veiy much enlarged, and 

 the claw sickle-shaped and moveable, inferior edge having a small 

 tooth with a slight notch on either side of it near the distal ex- 

 tremity ; claw as long as the wrist and tapering very gradually to 

 a point. 



5. Bopyrus squillarum. PI. VII. figs. 5, 6, 7, 8, 9, 10, 11. 



B. with posterior edge of last abdominal segment perfect. 

 Description. — ]\Iale minute, about 1 line in length or hardly 



so long, linear. Head small, and about half as long as its greatest 

 breadth. First thoracic joint larger than any of the succeeding. 

 Ambidatory legs very short and chelate. Female broad, flat- 

 tened and pyritbrui, \ery much contracted posteriorly and dilated 

 anteriorly. Voung almost globular. From beneath carapace of 

 Hippolyte ensiferus. 



6. Anatifa sulcata. PI. VII. fig. 13. 



The peduncle of this Anatifa is so short as not to be seen 

 without separating the animal from its attachment. The shape 

 is triangular, and the peduncular extremitv of the animal is 



G2 



