196 PROCEEDINGS OF THE ACADEMY OF 



Subgenus IIemithyris, D'Orb. 



Hemithiris, D'Orb. Pal. Fran. Fer. Cret. vol. iv. p. 342. 184'7. 



Dall, Am. Journ. Conch, vii. p. *I0. 1871. 

 Eyijothyris, sp. Fbs. and Hanley, Brit. Moll. ii. p. 345. 1855. 



1. Hemithyris Grayi, Woodward. 



Rlujnchonella Grayi^ Woodw. An. Mag. N. Hist. p. 444, pi. 

 X. fig. 16 a-b-c, 1855. Dall, 1. c. vi. p. 153. 1870. 



Feejee Islands. 



2. Hemithyris lucida, Gld. 



Bhynclwnella lucida, Gld. Proc. B. S. N. H. p. 323. 1800. 



Otia Conch, p. 121. A. Ad. An. Mag. N. H. 3d ser. xi. p. 



100. 1863. Dall, 1. c. vi. p. 153. 1870. Dav. P. Z. S. 



p. 309. pi. xxxi. figs. 13, 14. 1871. 



Japan. 



3. Hemithyris nigricans, Sby. 



Rhynclionella nigricans, Sby. (as Tere6rfliZfl),Thes. Conch. 



i. p. 342, pi. 71, figs. 81-82. 1846. Dall, 1. c. p. 152, fig. 



34. 1870. 



New Zealand. 



4. Hemithyris psittacea, Graelin. 



Anomia psittacea, Gmelin, S. Nat. 3348. 



Bhyn chonella psittacea , Auct. Rve. Conch. Icon. pi. i. f. 2 a-c 



Dall, 1. c. vi. p. 152, fig. 30-33. 1870. 



Hemithiris psittacea, D'Orb. 1. c. (t3'pe). 



Hypothyris psittacea, Fbs. and Hani. Br. Moll. ii. p. 346, t. 



57, f. 1-3. 



Boreal and Arctic Seas. 



5. Hemithyris sicula, Sequenza. 



Bhynchonella sicula, Sequenza, Dav. Mon. It. Tert. Brach. 

 ii. p. 23, pi. XX. fig. 6. 1870. Dall, 1. c. vii. p. 70. 1871. 



Coast of Portugal. 



6. Hemithyris Woodwardi, A. Adams. 



Bhynchonella Woodwardi, A. Ad. An. Mag. 3d ser. xi. p. 

 100. 1863. Dav. P.Z. S. p. 309, pi. xxxi. fig. 12. 1871. 

 Dall, 1. c. vi. p. 153. 1870. 



Japan. 



Genus DIMEEELLA, Zittel. 



Dimerella, Zittel, Dunker and Von Meyer's, I'al. Aug. p. 

 220. 1870. Type D. Gumbeli, Zit. 1. c. p. 222, pi. xli. 

 figs. 27-30. 



