a 
— 
174 SPOLIA ZEYLANIOA. 
The dactylos of the third and following pereiopods is also different, 
the dorsal spine being extremely small. The propodite is pro- 
portionately shorter in this species than in Syn. neomeris. 
Dimensions of the body. 
i= he DOM | b§ == 2°4 mm. 
bi — 2-4 mim | b= be 2) mm, 
oa An ota EW 65 11 -Samme 
6? = 3:2 mm. e! = 4:9 mm. 
bi — 13-2 im. e* = 3°65 mini. 
b> = 2:4 mm; 
Second pereiopod. 
1 = 4356; 825 | ct = 627; 627 
m = 5181; 825 | 5 = 1254; 660 
Cu—larOee soot | p = 2145; 693 
c’ = 792; 594 d = 1287; 244 
Co = 627 594 
Third pereiopod. 
m = 4785; 1617 ig p = 3729; 825 
6 = 2Sl0i) 957 | b = 1056 
General Distribution.—Maldives, Ceylon. 
SYNALPHEUS BIUNGUICULATUS, var. EXILIPES, Coutiére. 
Synalpheus biunguiculatus, var. exilipes, Coutiére. Fauna of 
Mald. and Lacc., 1906. 
Twelve specimens, from the Pearl Banks ; November, 1910. 
The rostrum and the two orbital spines are about equal in length, 
and the rostrum is much narrower than the orbital spines. The 
rostrum extends beyond the middle of the first antennular article. 
The first antennular article is one and a half times as long as the 
median article and two and a half times as long as the third. The 
scale reaches nearly to the middle of the median article. 
The antennal peduncle is one-third longer than the antennular 
peduncle ; its scale is only slightly longer than the latter, and the 
leaf-like portion of the scale is poorly developed. The basal scale 
consists of two parts : a longer ventral portion which extends to the 
middle of the median antennular article, and a smaller dorsal piece 
which extends as far forward as the tip of the orbital spine. 
The following are the dimensions of a typical specimen :— 
Gd. =i 0 mm. | 65 1b mime 
b} = 1:8 mm. bY = 2°5 mm. 
b> = 1-8 mm. @ = /9-b mm: 
b* = 1:6 mm. | e! — 4 0 mm. 
b* = 1-6 mm. | e> = 3:0 mm. 
b> = 1:25 mm. | 
