NAVICELLA. 



Plate IY. 



Species 14. (Tig. o, h, Mus. Cuming.) 



Navicella Cookii. Km. testa mhohlomjo-ovatd, tenni- 

 cula, yibhosd, fulvescente, olivaceo-nigro ohsciire late 

 reticulata, intus carulescente, medio rufesceide thicld, 

 area coltimellari parvd, pallidissime nifescente. 



Cook's Navicella. Shell suboblong-ovate, rather thin, 

 gibbous, light fulvous, obscurely broadly reticulated 

 with olive-black, interior bluish, tinged with red in 

 the middle, columellar area small, very faintly tinged 

 with red. 



Recluz, MS. JMus. Cuming. 



Hab. Philippine Islands; Cuming. 



A light gibbous species, allied to N. .■inhorhicidaris, 

 somewhat peculiarly contracted. 



Species 15. (Fig. o, b, Mus. Cuming.) 

 Navicella affinis. Nav. testa ovatd, subtus siibexpansd, 



olivaceo-litted, niyro dense reticulatd, intus carules- 



cente, area columellari lutescente, concavo-declivi. 

 The allied Navicella. Shell ovate, rather expanded 



beneath, olive-yeUow, densely reticulated with black ; 



interior bluish, columellar area yellowish, coucavely 



slanting. 

 Hah. ? 



There is little to distinguish this species from N. de- 

 pressa in point of colouring, but it may be recognized by 

 a difference of form. 



Species 16. (Fig. a, h, Mus. Cuming.) 

 Navicella magnifica. Nav. testa oblongo-ovatd, idrin- 

 qui- attenuntd, concenirice dense elevato-striatd, niyri- 

 cante-fuscd, epidermide corned, apice multo eroso, 

 intus cmrulescente, area columellari plano-decUvi, an- 

 rantio-rnfo tinctd. 

 The magnificent Navicella. Shell oblong-ovate, at- 

 tenuated at each end, concentrically densely elevately 

 striated, dark brown, epidermis horny, apex much 



eroded, interior bluish, columellar area flatly slanting, 



tinged with orange-red. 

 Ilab. Hamond's Island, Australian Seas. 



This fine species is of a bold expanded oblong-ovate 

 form, rather attenuated at each end, covered with a dark 

 bright brown epidermis, sculptured throughout with con- 

 centric rings of raised stria;. 



Species 17. (Fig. a, b, Mus. Cuming.) 

 Navicella sanguiscga. Nav. testa elongato-ovatd, sub- 

 oblique curvatd, gibbosd, apice obsoleto, coucentrice 

 rude anntdato-striatd, nigricante-fuscd, epidermide 

 corned, intus ccerulescente, area columellari termiiiali. 

 crassd, callosd, plus minus erosd. 

 The leech Navicella. Shell elongately ovate, some- 

 what obliquely curved, gibbous, apex obsolete, concen- 

 trically rudely ring-striated, blackish-brown, epider- 

 mis horny, interior bluish, columellar area terminal, 

 thick, callous, more or less eroded. 

 Ilab. New Caledonia. 



Of a peculiar elongately ovate form, obliquely curved, 

 with an eroded sinus on the inner side, which seems to 

 indicate that this sheH may prove to be typical of a new 

 genus. The columellar area forms a thickly flatly eroded 

 shelf across the end. Externally the epidermis is horny. 



Species 18. (Fig. a, b, Mus. Cuming.) 

 Navicella uaustkum. Nav. testa oeatd, subtus exca- 

 vatd, gibbosd, apice rostrato, olivaceo-luted, nigro 



dense reticulatd, intus carulescente, 

 parviusculd, albicante. 



'd columellari 



The scoop Navicella. Shell ovate, excavated beneath, 

 gibbous, apex beaked, olive-yellow, densely reticu- 

 lated with black, interior bluish, columellar area 

 rather small, whitish. 



Ilab. New Caledonia. 



Of a more than usual excavated gibbous growth, with 



painting similar in character to that of N. depressa. 



