68 ANCEV : LAND SHELLS EOUND IN HAMAKUA DISTRICT, HAWAII. 



12— Lypopupa peplonga, Pease. 



The identification is somewhat doubtful, as I have never met with Oahu 

 specimens and all those I have seen from Hawaii (Palihoukapapa, Mana, 

 and an extinct crater on the Kona coast) are subfossil. They are, however, 

 in fair condition and of a brown or dark colour. The description and figure 

 given by Boettger (Conch. Mittheil., i, p. 69, pi. xii, fig. 16) apply tolerably 

 well to these. They niea.sure 2^ millim. in length and li in diameter, and 

 have 5i whorls. The long superior palatal lamella extends on the peristome 

 and forms, with a well developed angular fold a small, circular, nearly closed 

 sinus. There are about 15 or 16 riblets on the last whorl. 



Lyrojiupa iwrlonfja and L. ro>iiaia, Pease { = vxihana, Dall) are, I think, 

 the only dextral forms of the group. 



13.— Lypopupa mipabilis, .Auc var. hawaiiensis, n. v.n. 



PI. v. fig. 18. 



Differt a typo (ex montibus " NVaianae " insulae Oahu) testa plerumque paulo 

 majore, robustiore, costulis pallidis, dente lamelliformi infero in fauce 

 aperturae magis valido et elongate ; anfract 6. 



Long. 2i, diam. i}, long, apert. \ millim. 



There are twenty or twenty-two costulae on the last w horl, while in the 

 type specimen there are about twenty-two to twenty-four, and there is no 

 trace of a pale ill-defined zone on the last whorl. The angular lamella is 

 weakly developed and scarcely produced, in fact reduced to a mere tubercle. 



14.— Lypopupa magdalenae, Anc var. ppisea, n. var. 



PI. V. fig. 19. 



This form agrees pretty well with Boettger's figure of Puiki Jiiraia, Gould, 

 (Conch. Mitth., i, p. 61, pi. xii, fig. 17), but I do not think it may be taken 

 as the true L. hjraia. Numerous sinistral species and forms, all very much 

 alike, have been shown to exist on the various islands of the Hawaiian group, 

 and one of these, from Olaa, I have referred to Pu]ta hjrata, although I am 

 by no means certain of the identity. Goulds description should equally be 

 applied to other things, but not to species with a strong angular fold such 

 as this. The diagnosis of the subfossil specimens of Palihoukapapa is 

 as follows : 



D'ffert a typo (ex Palama ins. Oahu) habitu plerumque magis cylindrico, 

 costis validioribus, albescentibus, zonula pallida conspicua in parte superiore 

 anfractus ultimi et rima umbilicari minus aperta. 



Long. 23, lat. \h millim. 



I observed about 1 5 to 17 ribs on the last whorl, while I counted about 

 15 in the examples of the typical lot from Oahu. There are 14 in number in 

 another new species detected at Olaa, Hawaii {L. rlafhrafula), a form in 

 which the upper palatal lamella does not reach the outer edge of the peristome. 

 In L. />/mfa, or rather the one I ascribe to Ii^mfa, there are 12 strong distant 



