452 Records of the Indian Museum. [Vo.L. XI, 
and usually well developed in P. ceylonicus, s. str. but are either 
small or absent in var. gracilibrachiatus. 
The following measurements (in mm.) were used in calculating 
the proportions given for this variety in the table on p. 449 :— 
| | 
| < 
| (itl evithe oa | 
| with / = 
| Sex. Ene | eme |) ie Sihid Hosl hod See 
| bryos). bryos). ze) 
FT lit i ae oe a ean 
babe of cara- | ye | 3) 13 | 13 | 13 | 13 | 22 larg lens] 11 Be 10°5 
“e. ial | 
[Length of femur | >; | 23 | 22 |2or5 [20'5|28'5| 25 | 24 | 24 [22's [20°5| 29 
3. P. CEYLONICUS var. PUSILLUS, Pocock. 
This variety is unable to live long in the absence of moisture. 
It is only known from the Central Province of Ceylon, and was 
first described from specimens caught at Punduloya by Mr. E. E. 
Green, who tells me he got them at an altitude of about 4200 ft. 
above sea level. It is represented in the Indian Museum collection 
by specimens from Nalanda, ca. goo-1o00 ft. ; Galagedara, ca. 
800-2000 ft.; Kandy,ca. 1500-2000 ft. ; Peradeniya, 1600-2200 ft. 
The best means of distinguishing this variety from the last and 
from the young of P. ceylonicus, s. str., have already been dealt 
with (pp. 450-451). One other character remains, however, to be 
noted here: it is quite common to find the first of the three dorsal 
spines at the distal end of the tibia of the arm represented in 
mature specimens of this variety by a distinct spiniform process. 
The process is, however, always very much smaller than in young 
specimens of equal size of P. ceylonicus, s. sty. Thus the greatest 
length for this spine seen in an ovigerous female of var. pustllus was 
about o'5 mm.; but in a specimen of P. ceylonicus, s. str., of 
approximately the same carapace-width (former 8 mm. the latter 
7°5 mm.) this spine is as much as 2 mm. long, and in a somewhat 
older specimen (carapace-width 9°5 mm.) it is 1°5 mm. long. 
The following are measurements (in mm.) taken from the series 
of this variety in the Indian Museum collection :— 
a 4 Agr Fes ae) E a 
me) 2 22 Ss | = in 
=| | = | 8 co) gq 
Sex cy OV | eo | | fot 
z e{ 9/9] e] sie aie TIS | El a : t1 4 eile + 
z Alten oe | Ee = 
O+ Or OF OF oo Or OF 
Width of | 
carapace. |10°5) 10 | 10/10/95 95| 9 | 9 | 9 | 85] 85] 85 | 8°5| 895|85]8'5| 8 | 8 | 8 18 
Length of / 
femur of |14°5|13'S|12°5| 12 | 11 10°5|13+5]11es} 10 115! 11 | 11 10%s! 10 | 9°5| 9 195] 9 | 9 [85 
arm. | | 
