Occasional Papers of the Museum of Zoology 45 



Type species: Tudora muskusi. Besides the three species 

 on CuraQao and Bonaire, this group apparently includes 

 Tudora cost at a ("Menke" Pfr.), habitat unknown, and 

 Tudora plicatula (Pfr.), from Puerto Cabello, Venezuela.^^ 

 All of the species are more or less arboreal. 



Tudora aurantia aurantia (Wood) 



Turbo aurantius Wood (1828; Index SuppL, fig. vi-23) ; compare Smith 

 (1898; Proc. Mai. Soc, III, 116). Cyclostoma aurantiacum Sowerby 

 (1843; Thes., fig. xxiv-46, 47), not Deshayes (1834; Belanger voy. Zool., 

 146). C. versicolor Pfr. (1846; Zeit. Mai., 33; and 1847; Cliemn., II, fig. 

 ix-13, 14) ; substituted for preceding ou account of Annularia aurantiaca 

 Schumacher (1817). C. carneum ''Menke" Pfr. (1847; Chenin., II, p. 

 65, fig. ix-11, 12) ; more cancellate form. Tudora versicolor Bland 

 (1868; Amer. J. C, IV, 192) ; the first Bonaire record. 



Type locality: unknown; probably in the vicinity of Kra- 

 lendijk, Bonaire (B2). 



Distribution of species : Bonaire and Klein-Bonaire ; every- 

 where on limestone outcrops, on trees and brush and under 

 rocks ; also occurs in the more heavily wooded localities, in the 

 region of the older rocks. 1,378 specimens collected. 



Distribution of subspecies : Bonaire ; southern portion, north 

 to Porta Spano and Seroe Montague (Bl-5; Bb3, 7). 781 

 specimens collected. 



Shell (figs. xii-A) : solid. Ground color: cream to pink; 

 spiral bands present or absent, orange to chocolate, broken 

 or entire; eroded apex and apical plug scarlet and orange to 

 deep indigo, almost black. Whorls: about 91/2, of which 

 4% are usually retained; not markedly convex and with 

 suture shallow but distinctly marked; gradually increasing 

 in diameter from first to last. Sculpture of last whorl : growth- 

 cords quite regular, low, broadly rounded and usually closely 

 spaced; spiral sculpture obscure (aurantia) except in umbili- 

 cal region, to almost as prominent as growth-sculpture (car- 

 nea) . Earlier whorls : growth sculpture more delicate, so that 



36 1923; Occ. Papers M^t^. Zool. Univ. Mich., no. 137; pp. 23-26, fig. 

 II-9. 



