9 s 



Stat. 16. Bay of Kankaraaraan, South coast of Kangeang Shore. 2 Spec. 



Stat. 125. Sawan, Siau-island. Reef. 1 Spec. 



Stat. 169. Atjatuning, West coast of New-Guinea. Reef. 1 Spec. 



As I am in doubt if the figure of Rumph (Amb. Rariteitkamer, PI. 40, fig. C) really 

 belongs to this species, like v. Martens (Die Mollusken etc. in Rumph's Rariteitkamer, p. 16) has 

 suggested, I have not cited that author. The figure resembles more a Siphonaria, but v. Martens 

 assures that the Museum of Berlin possesses a similar form. 



Helcioniscus Dall. 



1 . Helcioniscus tcstudinarius Linné. 



Linné. Syst. Nat. Ed. X, p. 783, N" 674. 



RUMPH. Amb. Rariteitkamer, p. 121, PI. 40, fig. A. 



REEVE. Conch. Ie. Vol. VIII, Patella, fig. 6. 



Stat. 50. Bay of Badjo, West coast of Flores. Up to 40 M. Sand. 1 Spec. 



Stat. 51. Madura-bay. Reef. 15 Spec. — Shore. 4 Spec. 



Stat. 64. Kambaragi-bay, Tanah Djampeah. Reef. 8 Spec. 



Stat. 152. Wunoh-bay, N. W. coast of Waigeu-island. Reef. 4 Spec. 



Stat. ? 1 Spec. 



It is strange that Pilsbry does not mention the granules on the radiating riblets, very 

 conspicuous in younger shells, but also, though rarely, in adult ones, they are mentioned by 

 Lamarck, with the words "decussatim striata" (An. s. vert. Ed. Desh. Vol. VII, p. 532). This 

 state of the shell has been figured by Martini (Conch. Cab. Ed. I, pi. 6, fig. 46). 



2. Helcioniscus enneagonus Reeve. 



REEVE. Conch. Ie. Vol. VIII, Patella, fig. 44. 



Pilsbry. Man. of Conch. Vol. XIII, p. 152, PI. 28, figs. 35, 36. 



Stat. 152. Wunoh-bay, N. W. coast of Waigeu-island. Reef. 1 Spec. 



*3. Helcioniscus rota Gmelin. 



Gmelin. Syst. Nat. Ed. XIII, p. 3720. 



Reeve. Conch. Ie. Vol. VIII, Patella, fig. 39 pars., fig. 56 [petalata), fig. 86 [luzonica), fig. 89 



(scalaris). 

 Pilsbry. Man. of Conch. Vol. XIII, p. 144, PI. 72, figs. 65 — 80. 



*Amboina. (N. A. M.). 2 Spec. 



Both specimens are young, and so it could not be made out, to which of the forms 

 mentioned by Pilsbry the)- belong. The shells are dark chestnut in the centre, v. Martens (Die 

 beschalten Gastrop. der deutschen Tiefsee-Exp. 189S — 1899, p. 141) has listed the species as 

 living in the Malay-archipelago. 



98 



