182 SPOLIA ZEYLANIGA. 
The antennal peduncle and scale are about equal in length and 
slightly longer than the antennular peduncle. Spence Bate figures 
the antennal scale as being much longer than the peduncle, but this 
appearance is due to the long setz on the front border of the scale. 
The following are the dimensions of the body :— 
af = 10-75 mm: 6§ = 3-5 mm. 
b1 = 2°95 mm. b7 = 4-4 mm. 
b? —'4°35 mm. 6 AG mam: 
6? = 4-0 mm. e! == 3b mm: 
b= 50 7 anne e2 = 4:35 mm. 
U2 32 mn 

The large claw is flattened laterally, and its length is two and a 
half times the height. Both upper and lower palmar surfaces are 
smooth. 
There is nothing noteworthy about the second pereiopods. The 
measurements are as follows :— 
i = 4620; 462 ct = 792; 297 
m = 3861; 429 co = 924; 330 
cl = 2310; 297 p = 1386; 396 
c2 = 1947; 280 d = 825; 165 
c? = 792; 297 

The third pair of pereiopods are characterized by having no 
regular row of spines on the propodite and by the lanceolate nature 
of the dactylopodite. The dimensions are as follows :— 
m = 5610; 1023 = 3861; 594 
6 j= lesb; 759 d = 2310; 363 
Distribution.—Indo- Pacific. 
ALPHEUS BIS-INCISuUS, de Haan. 
Alpheus bis-incisus, de Haan. Fauna Japonica, 1839. 
Six specimens, from the Pearl Banks ; February, 1911. 
Three specimens, from Trincomalee ; January, 1911. 
One specimen, from Colombo Harbour ; September, 1910. 
I have had considerable difficulty in deciding whether to place 
some of the above specimens in Coutiére’s varieties malensis and 
stylirosiris. Minute investigation, however, has revealed the fact 
that there appears to be no constancy in the proportions of the hands 
of the first pereiopods and in the carpopodite of the second pereiopods 
upon which Coutiére established his new varieties. 
I have, in fact, several specimens which show intermediate condi- 
tions between de Haan’s species and the variety malensis, both 
regarding the proportions of the hands of the first pereiopods and 
the relative lengths of the first and second articles of the carpos 
of the second pereiopods. 
