NAVICELLA. 



Species 9. (Fig. a, h, Mus. Cuming.) 



N.iviCELLA LENTIGINOSA. iVay. tedH subtrigono-ovatd, 

 HiMus concavo-expansd, olivaceo-luted, nvjricante-fmco 

 uncUque niiide I'meatd et leniiginosd, intus carides- 

 cente, area columellari parvd, concavo-decUvi. 



The freckled Naticella. Shell somewhat triangu- 

 larly ovate, concavely expanded beneath, olive-yel- 

 low, neatly lineated and freckled throughout with 

 blackish-brown, interior bluish, columellar area small, 

 concavely slanting. 



Hafj. ? ' 



Distinguished by its triangularly expanded form and 



neatly freckled painting. 



Fig. 10. (Mus. Cuming.) 

 The sheU here figured represents the Navicella elUptica 

 of Lamarck, which is a variety of the Linnean N. por- 

 relluna. 



Species 11. (Fig. a, b, Mus. Cuming.) 



Navicella Luzonica. Nav. testa anguste ovatd, g'lh- 

 hosd, ad apiceni coiispiciii rostratd, concentrice rude 

 striata, fulvo-castaned, immaculatd; intus caridescente, 

 area columellari aurantio-rufo tinctd. 



The Luzon Navicella. Shell narrowly ovate, gibbous, 

 conspicuously beaked at the apex, concentrically 

 rudely striated ; fulvous chestnut, unspotted, interior 

 bluish, columellar area tinged with orange-red. 



SouLEYET, Recluz, Eevue Zool. Soc. Cuvierieune, 1811, 

 p. 375. 



Hah. Island of Luzon, Philippines (in mountain streams 

 on stones) ; Cuming. 



Of a characte 

 fulvous-chestnut : 



stic narrow, gibbons 

 colour, destitute of a 



boat-like for 

 V marking. 



Species 12. (Fig. «, h, Mus. Cuming.) 



N.wiCELLA scarab.eus. Nav. iestd oblongo-ovaid, con- 

 vexo-depressd, siibtus planatd, apice retuse eroso, con- 

 centrice rude striata, nigricante-castaned, nitente, cor- 

 ned, intus carulescente, area columellari angustissimd, 

 crassd, declivi, cameo-rosed. 



The beetle Navicella. Shell oblong-ovate, convexly 

 depressed, flattened beneath, apex bluntly eroded, 

 concentrically rudely striated, blackish chestnut, 

 shining, horny, interior bluish, columellar area very 

 narrow, thick, slanting, flesh-rose. 



Ilab. Hamond's Island, Australian Seas. 



A very peculiar oblong-oval species, depressly flattened 



beneath, with a narrow, thickly callous, columellar area. 



The outer surface of the shell is covered with a hard, 



horny epidermis. 



Species 13. (Fig. c, i, Mus. Cuming.) 



Navicella livida. Nav. tesid subtrigono-ovatd, m?-sus 

 apicem gibbosd, sordide livido-olivaced, obscure reticu- 

 latd, intus livido-carulesceiite, area columellari con- 

 cavo-pland. 



The livid Navicella. Shell somewhat triangularly 

 ovate, gibbous towards the apex, dark livid olive, 

 obscurely reticulated, interior livid blue, eolumcllar 

 area concavely flattened. 



Ilab. ? 



Allied to N. saborbicularis, but of a dift'erent form and 



a;eneral livid hue. 



June, 1856. 



