STALK-EYED CRUSTACEA 123 



regular lines. The fingers are grooved and armed upon 

 their prehensile border with fine teeth. The walking legs 

 are short, compressed, and with a fine crest terminating in 

 a very sharp nail. 



In young specimens the carapace and the pincers are 

 more granular than in adults. 



The colour is chocolate-brown with yellow spots 

 bordered with blue and black, with similar spots on the 

 first pair of legs. The walking legs are red, with yellow, 

 blue and black bands. The eggs are yellow-red. 



Range. — Bermuda, West Indies, Gulf of Mexico. 



3. Medaeus. 



MedcEus . . Dana, Miers, Milne Edwards. 



Carapace moderately transverse and convex, with the 

 surface more or less lobulated or granulated, and with the 

 antero-lateral margin armed with from three to five teeth ; 

 the front projects slightly beyond the orbits, and is usually 

 divided into two lobes by a median notch. The antero- 

 lateral margins may be continued beneath the inferior 

 margin of the orbit as a toothed crest. The eyes and 

 orbits are small. The basal antennal joint attains the 

 infero-lateral process of the front, and may enter within 

 the inner orbital hiatus. The external maxillipedes are 

 truncated distally, and slightly emarginate at the antero- 

 internal angle. The legs of the first pair are of moderate 

 size, and the palms are usuall)^ tuberculated above ; fingers 

 dentated on the inner margins. The walking legs are 

 rather slender, and the fourth joint may be toothed above. 

 The abdomen in the male is five-jointed, with the third 

 to fifth joint coalescent. 



Range. — West Indian Sea, Australia, East Coast of 

 Africa ; shallow water and shore. 



