R. DOUGLAS LAURIE—BRACHYURA. 461 
binocular dissecting microscope. The line under consideration commences 
on either side just inside the lateral epibranchial spine and runs forwards to 
curve inward halfway between this and the outer orbital tooth, then running 
inward and slightly backward to terminate in a spot somewhat larger than 
the others well to the side of the middle line. Thus the whole line is divided 
into right and left halves, which are symmetrical. 
together on the branchial portions of the line. 
The growth-changes in this species are considerable, as the following table 
will illustrate; — 
The spots are closer 
enews Condition of | Condition of | Condition of 
No. of : C.b nner lateral lateral teeth on anterior] teeth on anterior 
: Sex. C1. | Cb. | A] borders of a : : 
specimen. ) Ol Res epibranchial | border of merus| border of carpus 
| ae tooth. of cheliped. | of cheliped. 
mm, | mm. 
362. fe 2°8 Anteriorly di- | Spiniform. | Spiniform, pro-| Spiniform. 
vergent. curved. 
363. fe) 35 99 5 ~ Acute. 
364 2 ovig.| 6:0 Approx. parallel. Fe Acute, pro- 9 
curved, 
365. fe) 7°75 Anteriorly con- A5 a3 “ 
vergent. 
309. 3 10-75 | 125 | 1:16 Blunt. Squarish, pro- Blunt. 
curved. 
360. 3 13:0 Neay | UeIy) 5 Notch. Blunt, a little Absent. 
procuved. 
361. © ovig.|13°0 | 17:0 | 1°31 » Obscure notch. a Bs 
During growth the main changes are (1) from spiniform armature to an 
armature which is more blunt and less conspicuous ; (2) from anteriorly 
divergent to anteriorly convergent antero-lateral borders of the carapace. 
The large difference in size between the two ovigerous females should be 
noted. The smaller specimen has reached the egg-beariag stage, while still 
showing the general characters appropriate to a comparatively early growth- 
stage. 
The different ratio between carapace length and breadth in the large males 
and the large female will be noted, due to the greater relative width of 
carapace in the female. . 
Out of seventeen g specimens with C.l. ranging fromi6 to 15 mm., eleven 
have the left and six the right hand the more massive. 
Var. edentula.—I suggested this name for alspecimen from Ceylon (loc. 
cit.), in which the lateral epibranchial tooth was absent and the hand naked. 
The former character appears of doubtful value,in view of the considerable. 
