12 On the Species o/Micippa and Pavamicippa. 



(30*5 millim.) ; length of rostrum 51ines (105 millim.) ; breadth 

 of carapace 13^ lines (28*5 millim.) ; length of a chelipecle 

 16| lines (35 millim.) ; length of first ambulatory leg 20| lines 

 (43-5 millim.). 



Paramicippa. 



Pavamicippa, M. -Edwards (partim), Hist. Nat. Crust, i. p. 882 (1834) ; 

 Kossmann, Malacostraca in Zoolog. Ergebnisse einer Raise in die 

 Kiistengebiete des Rothen Meeres, p. 5 (1877). 



The distinctive characters of this genus, if restricted to the 

 single species P. tuberculosa, M.-E., are as follows : — The 

 carapace is depressed, broadly pyriform or nearly orbiculate in 

 outline ; the orbits are scarcely defined either above or below 

 the eye-peduncles, which are slender, straight, and not com- 

 pletely retractile ; the postocular lobe, which terminates in 

 two spines or teeth, is well developed. The basal antennal 

 joint is considerably enlarged, yet not dilated so greatly as in 

 Micippa ; it is nearly oblong in form, Avith the distal extremity 

 slightly concave, and bears a small spine or tooth at the 

 antero-external angle ; the next joint, which is placed on a 

 level with the superior margin of the front, is very short, 

 triangulate or cordate, and dilated and flattened. The form 

 of the chelipedes in the male is not known ; the ambulatory 

 legs are robust and rather short, and their merus- and carpus- 

 joints are covered above with strong tubercles, which tend to 

 become spines. 



Paramicippa tuberculosa. (PI. I. fig. 1.) 



Paramicippa tuberculosa, Milne-Edwards, Hist. Nat. Crust, i. p. 383 



(1834). 

 Micippe parrirostris, Miers, Ann. & Mag. Nat. Hist. (ser. 5) iv. p. 13, 



pi. iv. fig. 9 (1879). 



Carapace broadly pyriform, very slightly convex, and 

 covered with numerous tubercles, which are sometimes acute 

 and spinuliform ; lateral margins armed with six or seven 

 short spines, which are more or less distinctly granulated on 

 the margins. The rostrum is small, deflexed in its distal 

 half, and divided by a median fissure into two compressed 

 lobes, which are slightly concave at the distal extremity ; the 

 postocular lobe, as noted above, is strongly developed and 

 terminates in two spines or teeth. The ocular peduncles are 

 slightly enlarged at base and constricted near to the distal 

 extremity, and project beyond the superior margin of the orbit 

 tor a distance about equal to the width of the rostrum at base. 

 The basal antennal joint is not greatly dilated at the distal 

 extremity the next joint is inserted between the base of the 



