Asteroidea of Portuguese East Africa. 49 



i & 



interesting. It is a typically shallow-water species, as the following bathy- 

 metrical notes will show : — 



China, .... Beach. 



Japan, . 

 Admiralty Islands, . 

 Port Jackson, . 

 Mergui Archipelago, 

 East Africa, 



5 to 25 fathoms. 

 16 to 25 fathoms. 



2 to 11 fathoms, and 6 to 15 fathoms. 

 8 fathoms. 



6 to 12 fathoms. 

 Locality. — Station VI., Kero-Nyuni Bay, near Bas Pekawi. 



Previously recorded from — Japan; China; Fiji Is.; Admiralty Is.; Port 

 Jackson ; Banda Sea ; Arafura Sea ; Macclesfield Bank ; N. W. Australia ; 

 New Zealand ; Andaman Is. ; Mergui Archipelago ; Ceylon ; Seychelles ; 

 Amirante Is.; Mauritius; Zanzibar; and the Bed Sea. 



Luidia maculata, M. and T. 



This species is represented by two specimens : the first, from Mtundo 

 Bay, has seven arms ; and the second, which is immature, has five complete 

 arms, and three being regenerated from the disc. 



The diagnostic characters in this species seem to be fairly constant, and 

 our specimens agree very well with those previously described. 



Locality. — Station III., Mtundo Bay (Wamizi Is. to Kii'uki Is.) ; 

 Station VI., Kero-Nyuni Bay. 



Previously recorded from — S. Japan ; Philippines ; Singapore ; Malacca ; 

 Macclesfield Bank ; Mergui Archipelago : Tuticorin ; and Mozambique. 



Luidia aspera, Sladen. 



This is a very distinct species, and we have no hesitation in referring 

 our specimens to it. It is characterised by the form of the paxilhe and 

 by the armature of the infero-marginal plates. The species is represented 

 by one specimen from Tunghi Bay, and several detached arms which were 

 obtained in a different haul of the dredge near the same place. 



The following are the measurements of the complete individual : — 

 £=145 r=16 P = 9r. 



Sladen, in describing this species, gives P=7'5r and P=8 m 5r. He also 

 remarks that the number of arms varies from 8 to 10, but in the above 

 specimen the number was 7, so that this feature cannot be regarded as 

 specific. 



The bathymetrical distribution of this species shows a considerable range. 

 The specimens from the Admiralty Islands were obtained in from 10 to 150 



VOL. XVIII. D 



