117 



ON SOME XON-MARINE HAWAIIAN MOLLUSCA. 



By C. F. Ancet. 



Bead Sth April, 1904. 



PLATE VII. 



StTCCiNEA Kfhnsi, n.sp. PI. VII, Fig. 1. 



Testa magna et pro genere solida vel solicliuscula, opacula, obliqua, 

 conico-ovata, infra ampliata, parum nitens, irregulariter rugoso- 

 plicatula, rugis obliqiiis subflexuosis, lutea vel fulvida, basi et circa 

 aperturam et columellam late et diffuse daucina vel nifo-tincta. 

 iSpira producta, apice pallido, mammillato, conoideo. Anfractus 3 

 convexi, laxe evoluti, sutura perobliqua et prope aperturam praesertim 

 valde descendente ac perimpressa discreti, ultimus maximus, obliquus. 

 Apertura obliqua, superne attenuata, infeme lata. Columella incrassata, 

 regulariter convoluta, longe arcuata sed baud plicifera. Margines 

 callo nitido conspicuo juncti. 



Long. 23, diam. 12-5, alt. apert. (oblique) 15 mm. 



ITab. — Kai'wicki, Hilo, Hawaii (Kuhns). 



Obs. — Variat unicolor, cerasiana, vel granatina, apertura intus 

 ejusdem coloris. 



This is a fine robust species, quite variable in colour, as shown 

 above, and often of a quite solid structure. It is a much stronger 

 shell than S. aurulenia, Anc, casta, Anc, or Thaanumi, Anc, also 

 from Hawaii and very distinct from them. It is named after its first 

 discoverer, at the request of Mr. Baldwin, and was subsequently 

 found in the same district by Professor Henshaw and Mr. Thaanum. 



SUCCINEA. CASTA, AnC. 



S. casta, Anc. : Proc. Malac. Soc, vol. iii (1899), p. 272, pi. xii, 

 fig. 10. 



Hah. — Olaa, Hawaii, 925 ped. supra mare (Thaanum, Henshaw). 



The following forms, although at first sight very different in shape 

 from the typical casta, appear to be local varieties, according to 

 Professor Henshaw. I extract the following data from a letter dated 

 April 14th, 1902 : — " The shells from 925 feet are from near the type 

 locality of casta, and there is no doubt that many from this locality 

 are very different from those above or below. Thej- are much broader, 

 and the spire is less prolonged. Still, there are individuals from this 

 locality that seem to me not separable from the form above. . . ■ . 

 The same striking variation in colour observable in casta obtains in 

 Kuhnsi. I have found red, white, and parti-coloured shells in the 

 same locality, and even on the same plants. Thaanumi again occurs 

 in the three colour varieties, red, white, and parti-coloured." 



