BXPLANATION OF PIRATE XII. 



A. — Exalloniscus coecus (DoUfus). 



n.s. Lines indicating natural size of specimen figured below in 



dorsal view. 

 I.S., m., m., mx. i., mxp. Upper and lower lips; mandibles and 



first maxilla ; and a maxilliped with further enlargement of 



the distal parts. 

 m',, mx. i'., mx. 2. Distal portions of a mandible and a first 



maxilla, second maxilla with its distal part further enlarged. 



These figures are drawn from a separate specimen, the distal 



portions uniformly magnified, 

 a.i,, prp., pip. I., pip. 2., urp. Second antenna, part of one of 



the peraeopods, the first male pleopod, inner branch of the 



second, uropod in attachment to the telsonic segment. These 



figures are on a lower scale than the mouth-organs. The 



antenna and terminal joints of a peraeopod are from the 



separate specimen, 

 sp. , sp'. Terminal spine of second antenna, and spines from the 



antepenultimate joint of peraeopod, on the same scale as 



the distal parts of the mouth-organs. 



B. — Hemilepistus klugii (Brandt). 



n.s. Lines indicating natural size of a specimen rather smaller 

 than that from which the drawings were made. 



C, Per.s. I — 5, T.D. — Dorsal views of head, peraeon segments to 

 end of the fifth, and telsonic segment with the uropods. The 

 peraeon segments are slightly inclined, with the lateral mar- 

 gins visible on the left, concealed on the right hand. 



Pl.V. Ventral view of the pleon. This and the preceding figures 

 are drawn to the same scale, less magnified than the rest, 

 which also are on a uniform scale. 



a.i. Second antenna, with apex of flagellum more enlarged. 



l.s., l.i., m., mx. i., mxp. Upper and lower lips; mandible, 

 first maxilla, and a maxilliped, the last three with further 

 enlargements. 



pip. I., pip. 2. First and second pleopods, with further enlarge- 

 ments, the higher magnification being the same for all the 

 figures. 



