STALK-EYED CRUSTACEA 477 



border is toothed in its free portion ; there are four small 

 teeth on the edge above the eyes, to this group follow 

 about twelve teeth. The inferior edge has nine teeth. 

 The keel and spines on the abdomen are not well marked. 

 Range. — Barbados, Bahamas. 



2. Oplophorus. 



Oplophonis . . H. Milne Edwards, Spence Bate. 



Carapace about one third the length of the body, 

 supported on each side by a subcarina, and anteriorly 

 produced to a long and slender rostrum that is serrate 

 on upper and lower margins. Outer angle of the orbit 

 defined by the first antennal tooth, which is curved 

 inwards between the eye-stalks and the external antennae. 

 The second antennal tooth is directed forwards, and the 

 fronto-lateral angle is produced to a tooth that is directed 

 forwards and outwards. The posterior margin of the 

 carapace is overlapped by the first abdominal segment 

 laterally. The third and following segments of the 

 abdomen are posteriorly produced in the middle line to 

 long teeth, so, when the animal is extended, they form a 

 strong keel. Telson ends in a sharp point. 



The eyes are short, with a circular ocellus on the 

 corneal margin. The internal antennae have a short 

 peduncle. The external have a long, strong basal 

 scale that tapers to a sharp point and has a serrated 

 outer edge. The mandibles have a three-jointed palp. 

 The first maxillipede is subpediform, and has the terminal 

 joints reflexed. The external maxillipede is five-jointed ; 

 the third and fourth joint are flattened, and have a long 

 and flat external appendage. 



The first two pairs of legs are short, subequal, and 

 robust. The following three pairs, short, terminate in a 



