368 ME. .1. R. HENDERSON — A CONTRIBUTION 



91. Neptunus sanguinolentus (Herbst). 



A*, sanguinolentus (Herbst), A. Milne- Ed wards, Nouv. Arch. Mus. Hist. Nat. t. x. p. 319 (1861). 



Rameswaram (Thurston) ; Ceylon (Haly) ; Sind, Bombay, Madras (Day). Very com- 

 mon on the S. Indian coast (J. H. H.). 



Distribution. Mascarenes, Malay Archipelago, Japan, Australia, Sandwich Islands. 



92. Neptunus argentatus, White. 



N. argentatus (White), A. Milue-Edvvards, Nouv. Avcli. Mus. Hist. Nat. t. x. p. 332, pi. xxi. fig. 4 

 (1861) ; Miers, '' Challenger' Brachyura, p. 177 (1886). 



Gulf of Martaban, four specimens (Oates). 



The largest specimen (a female with ova) measures 15 mm. long and 27 mm. broad, 

 including the lateral spines. This species is characterized by the presence of a silvery 

 metallic lustre on the ridges of the chelipedes, on the transverse ridges of the abdomen, 

 and elsewhere, still visible both in the above recorded spirit specimens and in White's 

 dried types. It is very closely allied to N. gladiator, of which species Miers regarded it 

 as constituting a variety, but I am inclined to consider the two as distinct. It is a smaller 

 species than N. gladiator ; the ridge on the outer surface of the hand is much more pro- 

 minent, as also are the ridges on the second and third abdominal segments ; while a black 

 spot is present towards the apex of the swimming dactylus as in N. hastatoides, but 

 which is not seen in N. gladiator. There are also differences in the form of the abdomen 

 — more particularly of the female — in the two species. The median frontal spines are 

 scarcely less developed than in some young specimens of N. gladiator, and there is a 

 rudimentary tooth on the supraorbital margin, as in young N. gladiator, but in older 

 individuals of the latter this becomes a prominent spine. 



Distribution . Borneo (White) ; Celebes Sea (Miers). 



93. Neptunus hastatoides (Eabr.). 



N. hastatoides (Fabr.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat, t. x. p. 332 (1861). 



Gulf of Martaban, a series including two with Sacculina (Oates). Common at Madras 

 [J. 11. H.). 



A female is 20 mm. long and 31 mm. broad, not including the lateral spines. In this 

 species the posterior angles of the carapace are acute and terminate in spinules — the 

 character on which Prof. A. Milne-Edwards has founded his subgenus DZellenus. The 

 lateral spines are longer than in N. gladiator ; the posterior gastric granulated elevations 

 are more pronounced, so as to become almost tubercular ; and the distal half of the 

 swimming dactylus is dark in colour. 



Distribution. From India to Japan and N. Australia. 



94. Neptunus Andersoni, De Man. 



N. Andersoni, De Man, Mergui Crust, p. 70, pi. iv. figs. 3, 4 (1887). 



Gulf of Martaban, ten specimens ( Oates). 



I refer these with some doubt to N. Andersoni, as I have not had an opportunity of 



