96 STALK-EYED CRUSTACEA. 



Munidopsis depressa Fax. 

 Plate XXII., Fig. 2, 2% 2\ 



BuU. Mus. Comp. Zool., XXIV. 189, 1S93. 



Closely allied to M. hamata, but differs as follows : the cephalothorax is 

 more swollen, so that the sides of the carapace are visible below the epimeral 

 sutures when the animal is viewed from above. The median row of spines 

 on the carapace consists of a smaller number of spines (two on the gastric 

 region, one on the cardiac region, and one on the posterior margin). Tlie 

 spinules of the lateral margin of the carapace are less developed. The de- 

 pression on the carapace involves the gastric region to a greater degree. 

 The anterior margin of the carapace is not so straight, and it is not spinulif- 

 erous. The antero-lateral spine is more px'ominent, the eyes smaller, and 

 the antenncB shorter (shorter than the carapace). There is, moreover, no 

 spine on the fifth abdominal segment. 



Length, 32 mm.; carapace, 19 mm.; rostrum, 5 mm,; breadth of cara- 

 pace, 12.5 mm. 



Station 3425. G80 fathoms. 1 male. 



Munidopsis aspera (Hend.). 



Elasmonotm asper Hesd , Ann. Mag. Nat. Hist., 5th Ser., XVI. 416, 1885 ; Rep. Challenger Anomura, 



p. 163, Plate XIX. Fig. 4, 1888. 

 Munidopsis aspera Fax., Bull. Mus. Comp. Zocil., XXIV. 188, 1893. 



1 fem. ovig. 

 1 male. 



1 fem. 



2 males, 5 fem. (3 ovig.). 



1 male. 



2 males. 



This species is subject to con.siderable variation. In the specimens from 

 Stations 3402, 3403, and 3406, the tubercles of the carapace are more numer- 

 ou.s and less spiny than in those secured at the other stations. The ambula- 

 tory appendages of all the " Albatross " examples are apparently more spiny 

 than in the types from the "Challenger." The latter came from the Straits 

 of Magellan, 245 fathoms. 



