180 SPOLIA ZEYLANICA. 
ALPHEUS ACULEIPES, Coutiére. 
Alpheus aculeipes, Coutiére. Fauna of Mald. and Lacc., 1906. 
Two specimens, from the Pearl Banks ; February, 1911. 
The rostrum is poorly developed. 
The proximal antennular article is slightly shorter than the distal. 
The median article is nearly twice as long as the proximal. The 
scale is short, and does not reach to the end of the first article. 
The antennal peduncle is one and a quarter times the length of the 
antennular peduncle. The spine of the scale is nearly as long as the 
antennal peduncle, but the leaf-like portion is shorter than the 
antennular peduncle. 
The dimensions of the body are as follows :— 
a = 50mm. bt = 1:67 mm. | e =76mm 
b} = 1-0 mm. 65 = 1:2 mm. e =3:3mm 
62 = 1:2 mm. 6§ — 1:3 mm. e = 3-0 mm 
63 = 1:2 mm. b7 = 2:0 mm. 
The chela is exceedingly large in propoftion to the body, and is 
probably about three-quarters as large as the rest of the body. The 
fingers are short. 
The dimensions of the second pair of pereiopods are as follows :— 
i. — 22) 5300 c? = 1534; 238 ce? = 561; 264 
m = 2442; 251 Cy 319) 247 p — lia 287 
ch 4955 2al Cs soso on 5027 emily 
The third pereiopod has a small spine on the ischium ; the meros 
has numerous short spines on its ventral border ; near this border 
is a longitudinal ridge which ends distally in a well-developed spine. 
The short carpos has a similar ridge and spine. The propodite 
has about a dozen spines more or less irregularly arranged. The 
-dactylos is curved, and is characterized by the presence of a small 
process on its ventral surface. The carpos and propodos are richly 
clothed with sete. Dimensions :— 
t = 792; 594 | oc = 1320; 462 | d = 373; 99 
m = 2475; 660 | p= 1518; 363 | 
General Distribution.—Maldives, Ceylon. 
ALPHEUS FRONTALIS, H. M.-Edwards. 
(Plate VI., Fig. 3.) 
Alpheus frontalis, H. M.-Edwards. H. Nat. des Crust., 1834. 
Alpheus latifrons, H. M.-Edwards. J. Mus., Godefroy, 1874. 
—_——-—. de Man., Arch. f. Naturg., 1887. 
Alpheus frontalis, Coutiére. Fauna of Mald. and Lacc., 1906. 
