12 



ings mingled together, the first arismg from the anterior point of the 

 outer lip, and proceeding to the inner edge of the aperture ; the second 

 from the middle of the outer lip, and extending along the anterior mar- 

 gin of the volutions to the apex ; spire acuminated, of half the length 

 of the shell ; volutions seven to eight, rather convex, suture slightly 

 prominent ; aperture somewhat wide and short ; outer lip smooth 

 and thin ; inner lip even and also edentulous, no varix at its inner 

 border ; channel short and wide ; a few striae traverse the anterior 

 part of the dorsum. 



Length, ^^ of an inch ; width, ^^ of an inch. 



Hab. ? Cab. Gaskom. 



18. CoLUMBELi.A HiRUNDO. Testa ovato-pyramidalis, lavis, 

 nitens, pallida, strigis punctisque brimneis leviter maculata ; 

 spird mucronatd, dimidium longitudinis testes cequante ; an- 

 fractibus novem vel decern planis ; aperturu latiusculd ; labio 

 externa crasso albo semicirciilari, dentibus duobus vel tribus 

 latis posticis internis, margine externa crasso albo ; labio in- 

 terno Icevi, svbspirali, dente solitario inajuscido ad posticam 

 partem ; canali longo, latiusculo, recurvo, rostris prominenti- 

 bus, externo divergente quasi furcato ut in formd caudce hirun- 

 dinis. 



Shell ovato-pyramidal, smooth and shining, pale in colour, lightly 

 speckled with fine brown streaks and dottings, with intermissions of 

 colour along the darker coloration of the posterior edge of the volu- 

 tions ; spire sharply mucronated, being about half the length of the 

 shell ; nine to ten flat volutions ; aperture rather broad ; outer lip 

 thick, white, semicircular, with two or three broad denticulations 

 within posteriorly, converges abruptly to form the channel ; external 

 margin strong and white ; inner lip smooth, subspiral, with a single 

 rather large node or tooth at the posterior part ; channel long and 

 moderately wide, recurved, beaks prominent, outer one diverging, 

 giving a forked appearance, as in the tail of the swallow. 



This species is of the stamp of Col. bicanalifera of Sowerby, Proc. 

 Zool. Soc. part ii. page 113; Sowerby' s Thesaurus, fig. 144. 



Length, ^"^ of an inch ; width, -^^ of an inch. 



Hab. Per the ' Samarang.' Cab. Gaskoin. 



19. CoLUMBELLA Californiana. Tcsta oblongo-ovata, sub- 

 pyramidalis, Icevis, nitens, brunnea, vel brunneo variabilis, ali- 

 quando lineis tenuibus, fortioribus, aut latiusculis irregulari- 

 bus ; spird acnminatd dimidium testa: subcequante ; anfracti- 

 bus septem, convexis ; aperturd latd subquadrangulari ; labio 

 externo tenuiusculo intus denticulato, labio interno leviter den- 

 ticulato ; dorso antice transversim striato ; peritremate pur- 

 pur eo-nigricante ; canali brevi. 



Shell oblong-ovate, smooth and shining, rather pyramidal, of a 

 brown colour, varying much iu intensity and markings, in being 

 sometimes uniform, in others with one or two thin darker coloured 

 cinctures, or with broad and continuous dark irregular markings 



