MONOGRAPH OF THE LEUCOSIADA. ` 289 
 LEUCOSIA OCELLATA, mihi (Tas. XXXI. fig. 1). Testà rhomboidali, fronte tridentato ; 
regione gastricà maculis quatuor parvis rubris signatà, quarum bins anteriores ocel- 
latæ. 
Hab. ad oras orientales Australiæ. Mus. Brit. 
Carapace rhomboidal, nearly as broad as it is long; front tridentate; margin granulated, 
excepting anterior to the hepatic region, latero-anterior margin waved; thoracic sinus 
deep, extending to the fifth pair of legs; the four spots on the gastric region, which are 
in other species large and pale, replaced by very small red ones, of which the anterior 
pair are distinctly ocellated. Sternum and pedipalps smooth. Buccal opening very broad 
at the posterior part, becoming regularly narrowed forwards, forming nearly an equilateral 
. triangle. Anterior legs stout; arm covered, excepting on the anterior part, with four 
rows of tubercles, each of which is white in the centre, surrounded with a red ring; wrist 
rounded, with a line of inconspicuous granules on the inner side. Hand rather longer 
than broad; the inner margin granulated; fingers meeting only at the point; the four 
posterior pairs of legs with the joints tumid. 
Length of carapace 0'7 in. - 
The four red spots on the carapace, of which the anterior pair are distinctly ocellated, 
will at once distinguish this species from every other; and it is remarkable that a similar 
disposition to ocellation is observable in the colour of the tubercles on the arms. 
LEUCOSIA HJEMATOSTICTA, Adams and White. “'Thorace trapezoidali, suprà valdè convexo, 
post angulum latero-anteriorem incisurâ profundä, maculis multis sanguineis rotun- 
datis obsito." 
* Hab. Maria orientalia.” 
Adams and White, Zool. Voy. of the Samarang, p. 54. t. 12. f. 2. 
Mus. Brit. 
This is one of the most beautiful little species of the genus; and one of the most 
peculiar in its form and markings. I have taken the above characters from the work of 
Messrs. Adams and White, in which the species is prettily figured. : 
- Length of the carapace 0:5 in. 
Leucosra: Warrer, mihi (Tas. XXXL fig. 2). Testà rhomboided, fronte producto, mi- 
nut? tridentato; regionibus hepatica et branchiali granulis tribus vel quatuor; bra- 
chiis tomentosis, tuberculis magnis omnind instructis. 
; ie, Mus. Brit. ; 
een it is long; front distinet, produced, with three 
with three or four distinct granulations; 
tero-posterior granulated, bordered above with a 
deep, strongly waved above, the inferior margin 
granulated, passing into the posterior marginal line, which is turned up, flattened and 
| d t-jaws simple and smooth. Abdomen of the 
crenate. Eyes visible from above. External foot-] dd 
female "ms oval, the division of the third, fourth and fifth segments indicated by grooves 
