ZOOLOGY OF THE FAR EAST. 
The rostrum reaches almost to the tip of the antennal scale in adults (text-fig. 8) ; in 
the young it is a trifle longer. The upper margin is straight or very slightly convex 
and bears from 8 to ii teeth ^ ; the hindmost is rather widely separated from the next 
of the series and the posterior two or three are placed on the carapace behind the level 
of the orbit. On the lower border there are 2 or 3 large teeth. 
The accessory ramus of the outer antennular flagellum is longer than the 
peduncle. 
The second peraeopods (text-figs. 8a, b) are equal and in well developed males reach 
beyond the end of the antennal scale by the chela and at least half the length of the 
carpus ; in the largest individual, however, they are proportionately shorter, reaching 
beyond the same point only by three quarters the length of the chela. Five specimens 
yield the following measurements : — 
X 
60 
e 
o 
(J 
O 
a] a 
k4 
M 
o 
Second peraeopod : length of 
o 
a 
o 
01 
OS 
a, 
9 
9 
75 22-4 : 42-0 
63 I i8-i 52-5 
57 i i6-i 50-5 
49 ^3-2 385 
43 11-2 307 
7- 0 
8- 4 
77 
5-9 
5-5 
8-4 
7-2 
5-5 
■yi 
cn 
3 
Palm. 
>s 
+J 
0 
a 
cs 
Q 
9'3 
9-6 
.5-6 
lo'g 
133 
8-6 
TO'4 
134 
8-3 
8-4 
9-2 
6-2 
7-1 
7-0 
44 
It will be noticed that the carpus is decidedly shorter than the propodus in all the 
larger specimens. In those below 45 mm. in length the proportions are, however, differ- 
ent, the carpus being almost as long, or even (as in the specimen measured) a shade 
longer than the palm. 
In the male 63 mm. in length the carpus is 27 mm. in breadth at the distal end, 
the segment thus being about four times as long as broad. In all the larger specimens 
the segments bear minute asperities, specially noticeable on the inner and under 
surfaces of the carpus and propodus where the}^ tend to form longitudinal rows. The 
fingers bear few hairs ; on their inner margins there is a fine ridge extending from the 
base to the tip ; there is a single small tooth at the base of the fixed finger and two in 
a similar position on the dactylus. 
The telson is produced to a sharp apical point which is, however, exceeded by the 
innermost of the two pairs of terminal spinules. 
The specimens collected by Dr. Annandale were found not far from Shanghai, the 
locality from which von Martens described the species. There is thus little doubt 
that they represent the true P. asperulus. 
1 The rostral formulae in ten specimens are, — 8/2, 9 2, 9/3, 9/3, To'3, 10/3, 10/3, 10 3, 11/3, 11/.^. 
