Hawaiian Species of Helicina. 5 



the figure does not agree very closely with the description . 

 Mighels gives the diameter as 3.8 mm; Gould's measurements 

 are: axis 2.5, base 3.8 mm. 



var. bronniana (Philipi). 



Helicinia bronniana Philipi, Zeitsch. Malak., iv, 1847, p. 124. Helicina 

 rotelloidea Pfeiffer, Conch. Cab., Helicina, p. 23, pi. iii, figs. 40-43. 



This variety is decidedly larger than the typical laciniosa. 

 Philipi does not mention any spiral lines. The flat whorls and 

 the rotundate-angulate periphery bring his species very close to 

 the typical laciniosa. This is probably one of the very local forms. 



Philipi's measurements are : alt. 4.2, diam. 5.25 mm. 



var. dissotropis (Ancey). 



Helicina dissotropis Ancey, P. Malac. Soc. London, vi, 1904, p. 127, pi. vii, 

 figs. 22, 23. 



M. Ancey, in a note, says, "Surely not a variety of H. sand- 

 witiiicnsis, Souleyet, of which I have typical specimens from the 

 Waianae Mountains, Oahu (D. D. Baldwin)." The shells dis- 

 tributed by Mr. Baldwin as H. sandwichiensis Souleyet are not this 

 species — which equals H. laciniosa Migh. — but H. oahuensis. 



In the variety dissotropis the shell is more compressed and 

 flattened and the periphery is more angulated than in the typical 

 form of laciniosa. 



M. Ancey's measurements are : diam. 4.2, alt. 2.25, alt. apert. 

 (oblique) almost 2 mm. 



The habitat is : Oahu, Nuuanu (Thaanum). 



var. delta, n. var. 



Fig. 2. 



The shell is somewhat lenticular, carinate at the periphery, 

 striate with lines of growth, with 4-6 low and not very conspicu- 

 ous spiral ridges grouped above and below the peripheral keel. 

 Bright red, distinctly and closely marked with numerous zigzag 

 yellowish white flammules. Spire depressed conic, apex subacute. 

 Suture lightly impressed, margined above. Whorls 4^, nearly 

 flat, the embryonic smooth, the penultimate slightly projecting, 

 the last flat above the carinate periphery, slightly convex below, 



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