178 SPOLIA ZEYLANICA. 
The third pereiopod is fairly strongly made. The dactylopodite 
is not nearly so slender as in most species of Alpheus. Dimensions 
of third pereiopod :— 
m = 4290; 1551 = 2706 ; 858 
c = 2673; 1155 d = 1320; 660 
Altogether this species is a very distinctive one, and in many ways 
is different from a typical member of the genus. 
General Distribution.—Indo-Pacific. 
ALPHEUS PHRYGIANUS, Coutieére. 
Alpheus phrygianus, Coutiére. Fauna of Mald. and Lacc., 1906. 
Three specimens, from the Pearl Banks ; February, 1911. 
The rostrum is represented by an extremely small projection. 
It is continued back between the eyes as a well-defined ridge. 
The antennular peduncle are comparatively long and slender. 
The proximal article is shorter than the distal and the median is 
twice as long as the distal. The antennular scale is rounded in front, 
and is half the length of the proximal article. 
The antennary peduncle is short and only extends to the end of 
the median antennular article. Its scale is still shorter, and only 
reaches to the middle of the median article. 
The following are the dimensions of the body :— 
a>—)/ 6mm? p22 mama 
b= 1-0) mim: bi —— 2 69mm 
p20 ram: ee = 5-1) mm 
62 — +2 718 mm. et == 3 6m. 
6* = 2-> mm, Crke— 22 ara 
65 —= 2:0 mm: 

The hand of the large claw is peculiar, and the dactylopodite has 
a process directed backward, which makes the dactylos hammer- 
shaped. 
The second pereiopod is exceeding slender and has the following 
proportions :— 
1) =o 1 9693 Cu 7922528 
m = 7326; 5181 ce? = 1221; 594 
cl = 2772; 488 p = 2574; 693 
c? = 2871; 528 d = 1154; 307 
ce? = 693; 528 

In the third and following legs the meros has a well-developed 
process near the distal end. At the distal end of the carpos there is’ 
a blunt process on the dorsal side and a spine on the ventral side, 
