FEOM THE INDO-PACIFIC AND WEST AFEICA. 311 



in all the rostrum is broken off, and this is also the case with the legs ! A larger leg of 

 the second pair, lying loose in the bottle, belongs very likely to the male No. 2 that still 

 bears its shorter left leg. This loose leg (No. 2, ;■) closely resembles the larger leg of the 

 male from Liberia, but the fingers are a little longer in proportion to the palm, and the 

 large tooth of each finger is somewhat more distant from the articulation. The palm, 

 11 mm. broad, is 9-5 mm. thick in the middle. The other, shorter leg fully agrees with 

 the shorter leg of the male from Liberia, which in this specimen is borne on the 

 right side. 



In the female No. 3, from the River Prah, the rostrum, slightly arcuate above the 

 eyes, reaches almost to the end of the antennal scales, and resembles that of the male 

 from Liberia. The last two joints of the outer footjaws, the right leg of the second 

 pair, and the three posterior legs are wanting. The merus of the left leg reaches to the 

 middle of the antennal scales ; the carpus, 9 mm. long, is 3"25 mm. broad at the distal end. 

 The inner margin of the chela is concave, the palm is 3*75 mm. broad and 3 mm. thick 

 in the middle, and the fingers, that shut close together, are only armed with minute teeth 

 near the articulation, and are as long as the palm. The other female has lost its legs. 



Such a large and fine collection as that of the 190 specimens from the river 

 at Catumbella has most probably never been at the disposal of any naturalist. 

 Unfortunately, in half of them the legs of the second pair are wanting. 



The teeth-formulse of the rostrum of 22 males and as many females (that are all 

 provided with the legs of the second pair, so that they certainly belong to this species) 

 are the following : — 



Tir 1 r\ . 11 r; . 12 . .12 -12 



Males. — One specimen ^ ; five specimens 3^ ; six specimens :^- ; one specimen ^ ; one 



13 .1.3 .13 . 14 , . 14 



specimen -3- ; one specimen :f ; one specimen ^ ; one specimen 3 ; two specimens j ; 



14 . 1.5 . 18 



one specimen g- ; one specimen 4 ; one specimen ^ . 



In one specimen the upper margin bears 11 teeth, in twelve 12, in three 13, in four 14, 

 in one 15, and in one 18. The lower margin is armed in seven individuals with 3 teeth, 

 in eleven with 4, in two with 5, and in two with 6. 



7, , cj- • 12 . . 12 . 13 . . 13 



females. — bix specimens 3- ; six specimens -^ ; one specimen -3 ; six specimens ^ ; 



,, . 14 



three specimens ^. 



In twelve specimens 12 teeth on the upper margin, in seven 13, in three 14. The lower 

 margin is armed in seven females with 3, and in fifteen with 4 teeth. 



In the males the number of teeth on the upper margin varies from 11 to 18, the most 

 frequent number is 12 ; the teeth of the lower margin vary from 3 to 6, the usual number 

 is 4. In the females the upper teeth vary from 12 to 14, the lower from 3 to 4 ; the 

 usual number of the former is 12, of the latter 4, exactly as in the males. 



In twenty-three specimens 4 teeth are on the cephalothorax, in four 5, and in two 3 ; 

 in ten specimens the fourth tooth stands just above the orbital margin, in five the 

 fifth. 



In not a single one of the 190 specimens from Catumbella is the rostrum limited to the 

 length of the antennulary peduncles ; in the larger individuals (fig. 41) it generally reaches 



