96 HALIOTIS. 



The form called semistriata by Reeve is figured on pi. 17, figs. 93, 

 100. It is reddish-brown, the earlier portion, radiately striped with 

 white, the body generally with a wide white spiral stripe in the mid- 

 dle, as shown in fig. 100. Toward the spire from this stripe the sur- 

 face is sharply sculptured by close, rounded, spiral cords ; but out- 

 side the stripe it is much smoother, having the cords almost obso- 

 lete, but generally with one or two low, nodulous spiral ridges. 

 Holes 4 to 5, on tubercles. 



The H. viridis of Reeve, pi. 17, fig. 91, is whitish, stained and 

 radiately marbled with green. It is undoubtedly synonymous. 

 This is not, however, the shell Weinkauff identifies as viridis. 



A form which may be called variety pustulifera is figured on pi. 

 23, fig. 52. It is chocolate or olive-brown, radiately painted with 

 broad flames of white finely reticulated with olive-green. The sur- 

 face is comparatively smooth except for three or four spiral rows of 

 small pustules. It is the form figured by Weinkauff as varia 

 (Conchyl. Cab., t. 3, f. 4) ; I consider Reeve's figure of varia the 

 type-form of that species. See pi. 17, fig. 99. 



H. dringii Reeve. PL 5, fig. 25. 



Shell orbicularly ovate, spirally striated, radiately plicated and 

 tuberculated ; perforations a little tubiferous, four open. Exterior 

 pale greenish yellow, conspicuously stained in the middle with 

 scarlet ; interior silvery. (Reeve.) 



North coast of Australia. 



H. dringii Reeve, Conch. Icon., t. 17, f. 65. — Sowerby, Thes. 

 Conch, v, p. 32, f. 42. 



This may be a young shell. 



H. concinna Reeve. PI. 5, figs. 21, 22. 



Shell somewhat oblong-ovate, spirally striated, slightly tuber- 

 culated in the middle, obliquely rather obscurely plicated. Four 

 perforations open. Fleshy-white, profusely variegated with scarlet 

 rose. (Reeve.) 



Zamboanga, Island of Mindanao, Philippines. 



H. concinna Reeve, Conch. Icon., f. 66. — Sowerby Thes. Conch. 

 v, p. 28, f. 46, 54. 



This may be compared with H. varia, the young of which it seems 

 to resemble. Sowerby says that Reeve named the species from a 

 very young and uncharacteristic specimen, and gives a figure and 



