Mr. E. J. Miers on neio Species of Crustacea. 221 



Neptunus pelagicus. 



Under this name two very distinct species appear to liave 

 been confounded, Avhich may be diagnosed as follows : — 



1. Neptuntis pelagicus. B.M. 



Cancer pelagiciis, Linn, Syst. Nat. ed. xii. p. 1042 (1766). 



Carapace evenly but not coarsely granulated, with distinct 

 epibranchial lines. Front 6-toothed, the median teeth smaller, 

 but never obsolete. The middle lobe of the upper orbital 

 margin with a small spine at its external angle. Anterior 

 legs very long and slender. Colour (in dried specimens) blue 

 or pink, with irregular spots, blotches, and bands of pale 

 yellow. 



This species occurs throughout the Red Sea and Indian 

 Ocean, the East-Indian islands, on the coasts of the Philip- 

 pines, China, and Japan, the eastern coast of Australia, and 

 at New Zealand, and often attains a very large size. 



2. Nejytunus trituherculatus, n. sp. Type, B.M. 



More convex, less coarsely granulated, with the epibranchial 

 lines less strongly marked than in N. pelagicus. Three low 

 tubercles placed in a triangle in the central portion of the cara- 

 pace — one anterior, upon the gastric, and two posterior, upon 

 the cardiac region. Front 4-toothed, the two median teeth 

 being obsolete. Middle lobe of the upper orbital margin com- 

 monly without a spiniform prominence. Arms shorter and 

 more robust than in N. pelagicus. Colour a dull pink or slate, 

 with numerous regular spots of pale yellow upon the carapace 

 and legs. 



This species inhabits the coasts of China and Japan, and is 

 figured by De Haan, in the ^ Fauna Japonica,' pis. ix., x., as 

 N. pelagicus. It attains to quite as large a size as that species. 

 The Cancer cede nulli of Herbst (' Krabben,' ii. pi. xxxix.) 

 resembles it in having a 4-toothed front ; but there is no indi- 

 cation of the three tubercles on the carapace, and the form of 

 the teeth of the antero-lateral margins and front and of the an- 

 terior legs is very different. 



Elaviene Wkitei, n. sp. lYP^j B.JiE. 



Halicarcinua depressus, "White, Ann. & Mag. Nat. Hist, xviii. p. 178 

 (1846), nee J acq. & Lucas. 



Carapace subtri angular. Front between the eyes broad, 

 lamellate, and concave above, projecting considerably beyond 



