396 FAUNA HAWAIIENSIS 



Fam. PALUDESTRINIDAE. 



Paludestrina D'Orbigny. 



Paliidestrina porrecta Mighels. 



Paludina porreda Mighels, P. Boston Soc. ii. (1845), p. 22. 

 Hab. Oahu (Mighels). 



Fam. HELICINIDAE. 

 Helicina Lamarck. 



In 1799 (Mem. Soc. Hist. Nat. Paris, p. 77) the genus was described but no type 

 or species named; in 1801 (Syst. An. sans Vert. p. 94) the only species named was 

 Helicina neritella Lam., which may be taken as the type. Lamarck refers for a figure 

 to Lister (Hist. Conch, fig. 59), and this illustration appears to represent a Helicina, 

 thouafh it is hard to be certain whether it be H. nerilclla or not. 



(i) Helicina laciniosa Mighels. 



Helicina laciniosa Mighels, P. Boston Soc. 11. (1845), p. 19 ; Gould, U. S. Explor. 

 Exped. Moll. pi. VII. fig. 108. 



A very variable shell in size and coloration ; it appears to be always more 

 compact and elevated than H. sandwichiensis. 



Hab. Oahu (Mighels). — Kauai (Baldwin). — Lanai, behind Koele ; also Kalamaula, 

 Molokai ; Kaala, Oahu ; and between Lihue and the sea, Kauai (Perkins). 



(2) Helicina magdalenae Ancey. 



Helicina magdalenae Ancey, Bull. Soc. Malac. France, vii. (1890), p. 342. 

 Helicina constricta Pfeiffer, P. Zool. Soc. London, 1848, p. 120; Conch.-Cab. 

 Helicina, p. 22, pi. vii. fig. t,'] — 9 [both relate to his variety only]. 



Pfeiffer's typical form came from ' Otaheite ' and appears to belong to a different 

 species to his variety, which seems to be identical with this. Possibly forms may be 

 found linking H. magdalenae to H. nhcrta. 



Hah. Oahu, Tantalus (Ancey). 



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