MONOGRAPH OF THE LEUCOSIAD.^. 289 



Lettcosia ocellata, mihi (T.vb. XXXI. fig. 1). Testa rhomboidali, fronte tridentato; 



regione gastricil maculis quatuor parvds rulji-is signata, quarum binae anteriores ocel- 



latsB. 

 Hab. ad oras orientales Australia;. Mus. Brit. 



Carapace rhomboidal, nearly as broad as it is long ; front tridentate ; margin gi-anulated, 

 excepting anterior to the hepatic region, latero-anterior margin waved ; thoracic sinus 

 deep, extending to the fifth pair of legs ; the foiu- 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, wdth 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. 



Letjcosia h^matosticta, Adams and "White. " Thorace trapezoidali, supra valde convexo, 

 post angulum latero-anteriorem incisura profunda, 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. 



Ledcosia Whitei, mihi (Tab. XXXI. fig. 2). Test4 rhomboidea, fronte producto, mi- 

 nute tridentato ; regionibus hepatica et branchiali granulis tribus vel quatuor ; bra- 

 chiis tomentosis, tubei'culis magnis omnino instructis. 

 Hab, ad oras AustraHae. Mus. Brit. 



Carapace rhomboid, nearly as broad as it is long ; front distinct, produced, with tliree 

 minute teeth ; the hepatic region slightly raised, with three or four distinct granulations ; 

 the anterior portion of the branchial Avith the same numljcr of similar ones near the mar- 

 gin ; latero-anterior margin smooth ; latero-posterior granulated, bordered above with a 

 line of short woolly hau* ; thoracic sinus deep, strongly waved above, the inferior margin 

 granulated, passing into the posterior mai-ginal line, which is turned up, flattened and 

 crenate. Eyes visible from above. External foot-jaws simple and smooth. Al)domen of the 

 female broad oval, the division of the thii'd, fourth and fifth segments indicated by gi-ooves 



