272 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



10. SucciNEA Thaanumi, n.sp. PI. XII, rig. 3. 



Testa late ovata, fragilis, pellucida, subdepressa, lineis incrementi 

 rugiformibus irregulariter et grosse impressa, rubella vel luteo- 

 succinea, circa columellam late et insigniter rubro-tincta. Spira 

 conoidea, parva, parum producta, apice minuto, obtusiusculo. 

 Anfractus 21, celeriter crescentes, convexiusculi, sutura impressa, 

 ultimus multo maximus, late ovalis, testam fere totam sequans. 

 Apertura ampla, lata, margine supero cum dextro arcuatim juncto, 

 extus elliptico, columellari longe arcuato, tenui, absque plica, basali 

 patulo. Long. 15, lat. 10 mm. ; alt. ap. 13, lat. ap. 9 mm. 



ITah. — Olaa, Hawaii (Thaanum). 



A remarkably fine species, allied to the last, but broader, less 

 thin-shelled, more coarsely sculptured, less shining, and with a more 

 diminutive spire of 2| whorls only. Named after its discoverer. It 

 recalls to mind Amphilulima pattcla, Brug. 



Var. /3. — Purpurea, unicolor. 



11. SucciNEA CASTA, n.sp. (S. venusttt, Gould, var.?) 

 PI. XII, Fig. 10. 



Testa oblonga, tenuis, pellucida, succinea (margine columellari 

 interdum rufo-tincto), lineis incrementi rugiformibus, sed Isevibus, 

 ii-regulariter notata, nitens. Spira obtusa, producta, summo valde 

 mamillato, pallida vel rubella. Anfractus 2i-2|, celerrime 

 crescentes, oblongi, regulares. Apertura obliqua, ampla, ovata, 

 superne attenuata et angulata, basi subrecedens. Columella arcuata, 

 tenuis, plica destituta, margine externo regulariter curvato. 

 Peristoma simplex, acutum, baud patulum. Long. 13-14*5, 

 lat. 7-5-8-33mm. ; long, apert. 9-5-10 mm. 



^fl3.— Olaa, Hawaii (Thaanum). 



I do not know Gould's S. venusta, of which S. casta may perhaps 

 prove to be a local race, but according to the description S. venusta 

 is smaller, has the last whorl broad and gibbous, which is not the 

 case in S. casta ; the coloration, also, is not the same, specimens of 

 S. casta being more or less reddish around the columella and on the 

 spire, no mention of this being made in Gould's description. Tiius 

 I think the species may be conveniently separated. 



12. Sttccin-ea Gaerettiana, n sp. PL XII, Fig. 7. 



Testa ovata, tenuissima, intense cinnamomeo-rufescens, sericeo- 

 nitens, irregulariter rugoso-striata. Spira sat brevis, conoidea, obtusa, 

 apice papillata, sutura valde impressa. Anfractus 3, convexi, celeriter 

 crescentes, ultimo magno, ovato, subinflato. Apertura ovata, sursim 

 subattenuata, subobliqua. Columella arcuata, superne indistincte 

 et levissime contortula. Peristoma simplex, acutum, baud expansum. 

 Long. 9-75, lat. 6-25 mm. ; long, apert. vix 7 mm. 



Hah. — Eainbow Palls, Hilo, Hawaii. Pound in the gorge of the 

 falls, in very wet places only, on green slimy rocks where water 

 is always trickling down (Baldwinj. 



