368 PROCEEDINGS OF THE ACADEMY OF [NoV., 



More globose; white; 14 to 17 mm. long. H. aperta oahuensis 

 Pils. 



4. Diameter equalling or close to half the length . . H. curta (A. Ad.) 

 Diameter less than half the length 5 



5. Nearly cyhndric, elongate H. tomaculum Pils. 



Shorter; sides distinctly convex H. olopana, n. sp. 



Haminoea crocata Pease. Figure 6. 



Oval, light ochraceous buff. The specimen figured, received 

 from Pease, measures, length 13.2, diameter, 8.3 mm., but most of 

 those seen are smaller. H. crocata is scarcely to be distinguished 

 from H. galba Pse.; the latter (fig. 7, length 11, diameter 6.8 mm.) is 

 perceptibly less swollen, with the lip rising less at the summit; 

 according to Pease there are differences in the shape and color of 



Fig. 6. — H. crocata Pse. Fig. 7. — H. galba Pse. 



the living animals. In actual practice I find the assorting of speci- 

 mens far from easy. The historic examples figured are extremes 

 and recently collected shells often fall short of the ideal form. Both 

 forms have a close, fine, shallow and wavy spiral striation, scarcely 

 visible except under the microscope. 



Probably when the living animals are observed the conclusions 

 of Pease can be tested, and the matter put on a sounder basis. 



H. crocata is before me from Paumalu, Kailua, Koko Head and 

 Kaneohe Bay, Oahu, and Haena, Kauai. Specimens referable to 

 H. galba from Paumalu, Honolulu, Kaneohe Bay, Oahu, and Haena, 

 Kauai. 



Haminoea sandwichensis Sowerby. 



This shell is said to have an umbihcated summit and more pointed 

 ends. It is white, and rather similar to the preceding in shape. I 

 have not seen it in some hundreds of Hawaiian Hamineas examined. 



