514 s. goto: 



1111(1 PfeiivER (189C) bekannt war ; vcju Mozambique wird sie von v. Mar- 

 tens (1866) und Bell (1884) erwälmt, von Madagaskar von Lütken (18C4) 

 imd Hoffmann (1874)." 



Bell mentions it as either specifically identical with O. nodasiis or else 

 closely interbreeding Avitli it (see under 0. nodosm, p. 486, Bell, '99). 



It is again mentioned from Zanzibar by Bell [:03, p. 244] : 



"5. Peutaceros Linclci, de Bl. 



•' Tliis is the form catalogued by Prof. Ludwig as P. muricatus of 

 LiNCK, lint that zoologist was not a binomialist. 



"Zanzibar shore." 



Herdman [: 0.3, p. 107] mentions tliis species imder the name of 

 Pentaceros lincJd as occurring in very large numbers on some of the pearl- 

 oyster banks of the Gulf of Manaar and destroying the oysters. He also 

 reproduces a figure of a specimen lying on a large pearl-oyster. 



The Herdmans mention it as a distinct species [Herdman, Herdman 

 & Bell, : 04, p. 144] : 



" Pentacei^os linclci, De Bl. 



" From lagoon inside reef, Galle. Common on tlia paarl banks in the 

 Gulf of Manaar, and of imporfcanca as an enemy of the pearl oyster (see 

 figure on p. 147)." 



Herdman [ : 06, p. 121, 125, 447, pi. 1, fig. 1] again mantious Pen- 

 taceros lincld as an enemy of the pearl oyster. 



Brown reports P. lincld from the Mergui Archipelago [: 10, p. 32] : 



"Localities. — XIV., Busliby Island, 15 to 23 fathoms, sand, shell, and 

 rock; XVH., Sir John Malcolm Island, 14 fathoms, sand and rock; XXV., 

 Gregory Group, 4 to 14 fathoms, sand and shell. 



"Very frequent on the pearl banks, where it is reputed by the divers 

 to work havoc among the mother-of-pearl oysters. The collection includes 

 a series of nine dried specimens of this variable species. 



"In some specimens the development of spines is very luximant and 

 in these cases the distal supero-marginals liear conspicuous spines : in other 

 cases, however, all the spines are more poorly developed, and those of the 

 supero-marginals are not prominent. Two specimens liave no central apical 



