lOI 



1890. Meleagrina scheepmakeri Paetel, Cat. Conch. Samm., III, p. 205. 

 1901. Margaritifera scheepmakeri Jameson, Proc. Zool. Soc. London, p. 384. 



Jameson had no spécimens of this species before him, but suggested that it probably is 

 synonymous with P. sugillata (Reeve). In the "Siboga" collection there is a single rather worn 

 shell, which, except for size, agrées with Dunker's description of the species, and is quite distinct 

 from Reeve's P. sugillata. For référence I figure this shell. 



Distribution : — The habitat of the type-specimen was not known. 



The "Siboga" shell was collected in the Bay of Badjo, west coast of Flores (St. 50). 



5. Pinctada tegtilata (Reeve). 



1857. Avicula tegulata Reeve, Conch. Icon., X, Avicula, pi. VII, fig. 17. 

 1860. Avicula tegulata Reeve, Elem. Conch., IL p. 64. 

 1890. Meleagrina tegulata Paetel, Cat. Conch. Samm., III, p. 206. 

 1901. Margaritifera tegulata Jameson, Proc. Zool. Soc. London, p. 392. 

 1910. Meleagrina tegulata Hediey, Austral. Ass. Adv. Sci., XII, p. 344. 



Jameson was unable to décide the exact status of this species. In the "Siboga" collection 

 there are a number of young shells which undoubtedly belong to Reeve's species. The shells 

 are squarish with the hinge margin almost straight and the umbo hardly projecting. The posterior 

 part of the shell is formed by a broad non-nacreous wing and the shell is not very tumid. The 

 yellowish-brown coloured shells bear a large number ofrows offlattened somewhat triangular scales. 



Distribution : — P. tegulata was described from Moreton Bay, Australia. 



In the "Siboga" collection the shells, which I refer to this species, were collected in the 

 Bay of Nangamessi, Sumba (St. 53) and i\nchorage east of Dangar Besar, Saleh Bay (St. 313). 



6. Pinctada szi-gillata (Reeve). 



1857. Avicula sugillata, A. irradians and A. fimbriata (Reeve non Dunker), Reeve, Conch. 



Icon., X, Avicula, pi, IX, fig. 27, pi. X, fig. 35, pi. IX, fig. 25. 

 1860. Avicula irradians, A. fimbriata and A. sugillata Reeve, Elem. Conch., II, pp. d"^, 64. 

 1872. Avicula [Meleagrina) Reeviana Dunker, in Martini Chemn. Conch. -Cab. (N. F.), VII (3), 



Avicula, p. 45, pi. XV, fig. i. 

 1890. Avicula irradians and A. sugillata Paetel, Cat. Conch. Samm., III, pp. 205, 206. 

 1894. Margaritifera fimbriata Henn, Proc. Linn. Soc. N. S. Wales, (2), IX, p. 181. 

 1901. Margaritifera sugillata Jameson, Proc. Zool. Soc. London, p. 380. 



19 10. Meleagrina sugillata Hediey, Austral. Ass. Adv. Sci., XII, p. 344. 



191 1. Meleagrina irradians Pelseneer, "Siboga" Lamellibranches (Anat.). p. 25. 

 1916. Pinctada sugillata Hediey, Journ. Proc. Roy. Soc. W. Australia, I, p. 25. 



As Jameson remarked, the form of the shell of P. sugillata is very variable. The valves 

 are moderately convex and the hinge-line is, for the size of the shells, rather narrow. The lip 

 is normally covered over by lappet-like processes, but thèse are very délicate and easily broken. 

 The lip is of a dirty yellow colour with traces of brown markings. The nacre is shining metallic 

 white with greenish or yellowish tints shining through. 



Distribution : — Ail previous records of P. sugillata are from the Australian waters. 



In the "Siboga" collection it is represented by young shells collected at St. 25 (8° 48^.9 S., 

 ii5°38'E., 118 mètres), Sailus Ketjil, Paternoster Islands (St. 37), Bay of Nangamessi, Sumba 



