152 A HISTORY OF RECENT CRUSTACEA 



the trunk, a mistake which Professor Smith has now cor- 

 rected. Remipes testudinarius, Latreille, has been recorded 

 by this and various other names from many parts of the 

 Indo-Pacific region. Its true name would seem to be 

 Remipfts adactylus (Fabricius). Remipes scutellatus (Fabri- 

 cius) is found in the Atlantic. 



Mastigochlrus, Miers, 1877, meaning ' with a whip- like 

 hand,' was previously called Mastigopus by Stimpson in 

 1858, but the name being pre-occupied had to be changed. 

 Its chief distinction from Remipes rests on the form of the 

 long and slender first pair of legs, which have the terminal 

 joint subdivided. The type specimen of Mastic/ochirus 

 quad/rilobatuS) Miers, came from the Philippine Islands. 

 A comparison of this with others subsequently obtained by 

 the Alert in the Prince of Wales' Channel showed Mr. 

 Miers that 'the number of joints in the terminal flagelli- 

 form portion of the anterior limbs (which are imperfectly 

 seen on account of the hairs with which they are thickly 

 clothed) was understated in the original description ; in- 

 stead of being ten or twelve, they are usually twice as 

 numerous.' 



Fi im Hi/ 2 . A lit meidoB . 



The third maxillipeds are subpediform, with the fourth 

 joint not greatly dilated ; there is a small exopod. The 

 first pair of legs are flattened and ch elate. The telsoii is 

 ovoid. 



Albunea, Fabricius, 1798, has for its type species the 

 little Albunea symnista (Linn.), from eastern waters. The 

 carapace is strongly grooved behind for the reception of 

 the small first segment of the pleon. In Milne-Edwards' 

 ' Histoire Naturelle des Crustaces,' vol. 2, p. 202, the dis- 

 tinguishing characters of Remipes and Albunea are trans- 

 posed, but the error is subsequently corrected. 



Legion 2. Lithodinea. 



The carapace is broadly ovate, uneven, with the regions 

 well defined and a prominent rostrum. The first antennae 

 have cylindrical peduncles of moderate size and short 



