74 COLLECTIONS FEOM MELANESIA. 



have a somewhat radiating disposition on the spire. Both specimens 

 have a series of small patches around the periphery of the body- 

 whorl and a second below it on the under surface. They are con- 

 siderably smaller than those described by Fischer, but may not be 

 full-grown ; this is probably the case, as the umbilicus is more 

 open than in the shells from Lifu. The whorls also exhibit little or 

 no trace of an angle above the middle. 



94. Trochus (Monodonta) laMo. 



Iiinn., Philippi in Kiister's Con.-Cab. p. 166, pi. 27. figs. 1-3, & pi. 44. 

 fig. 8. 



Hah. "West Island, Prince of Wales Channel, Torres Straits {Oop- 

 pinger) ; Darnley Island (Brazier). 



95. Trochtis (LaMo) zebra, Menke. 



Hah. Port Jackson (Ooppinger Sf Angas). 



This species is the T. tceniatiis of Quoy & Gaimard, 1834 (not 

 T. tcBniatus, Wood, 1828), and Labia porcata of A. Adams is only a 

 slight variety. 



Philippi (Con.-Cab. p. 160) is inclined to consider T. zebra merely 

 a variation of T. constrictus, and possibly he is correct ; still I think 

 further evidence is requisite in order to place this supposition beyond 

 a doubt. 



Specimens of this species are in the British Museum from N.E. 

 Australia, Port Jackson, Port Phillip, Tasmania, and New Zealand. 



96. Trochus (Perrinia) eHsus. 



Trochus elisus, Oould, Proc. Bost. Soc. Nat. Hist. 1849, vol. iii. p. 92 ; 



Otia Conch, p. 57 ; Wilkes, Explor. Exped. Moll. p. 178, Atlas, 



pi. 13. figs. 216-216 e. 

 Thalotia ehsa, Gould, Otia, p. 245. 



Hob. PortMoUe, Queensland, 12-20 fms. (Copjjin^rer); Singapore 

 (Gould); Island of Capul, Phihppines, on the reefs at low water 

 (Cuming). 



The two specimens of this beautiful species from Port Molle are 

 peculiar in having four spiral liras instead of three upon the upper 

 whorls, and those beneath the periphery of the last rather finer than 

 in the Philippine examples. The deep suture and the character of 

 the sculpture rather suggest Perrinia than Thalotia as the section 

 for this species. 



97. Troclius (Euchelus) atratus. 



Turbo atratus, Gmelin, Si/st. Wat. p. 3601. 



Trochus atratus, Philippi, Conch.-Cab. p. 174, pi. 27. fig. 14. 



Monodonta canaliculata, Lamarck, An. «. Vert. uo. 20; Delesseri, 



Jtecueil, pi. 37. fig. 1; Quoy 8f Gaimard, Voy. Astrdahe, pi. 64. 



figs. 21-25 (as Trochus). 



