ANCILLARIA. 



Plate V. 



Species 12. (Fig. a, b, Mils. Cmiiing;.) 



Ancillaria siMiLis. Aiic. testa fusiformi-oMongd, tenui- 

 cit/ii. Candida, spird acuminata, callositate latiiisculd ; 

 aperlurd anynstd, colmnelld arcuald, parim contorld. 



The similar Ancillakia. Shell fusiformly-oblong, 

 rather thin, white, spire acurainaled, callosity rather 

 broad ; aperture naiTcw, columella arched, but little 

 twisted. 



SowERBY, Thes. Conch. Anc. p. fi-i. pi. 311. f. 17. 



Huh. Torres Straits, North Australia. 



A colourless shell of light growth, distinguished by a 

 characteristic acuminatelv-oblong form. 



Species 13. (Fig. a, h, Mus. Cuming.) 



Ancillaria elo.sgata. Anc. testa acuminato-elonf/ald, 

 teniii, ventricosd, Candida, spird acuminatd, caltositatf 

 supra et infra Icevigatd, nitente-eburned ; aperiurd an- 

 gustd, colmnelld subrectd. 



The elongated Ancillaria. Shell acuminately elon- 

 gated, thin, ventricose, white, spire acuminated, cal- 

 losity above and below smooth, shining ivory ; aper- 

 ture narrow, columella nearly straight. 



Gray, Sow. Thes. Conch. Anc. p. 62. f. .52, 53. 

 Hab. ? 



Unlike other species of this form, there are no spiral 

 ridges at the base of the shell. The callosity, both above 

 and below the whorls, is of ivory smoothness. 



Species 14.. (Fig. a, b, Mus. CuniiMg.) 



Ancillaria torosa. Anc. testd ovatd, teniiiculd, ven- 

 tricosd, aurantio-lutescente vet ciiinawumed, spird bre- 

 vissimd, partim immersd, siitnrd calloso-eaualicidatd ; 

 aperturd patuld, columella mbcontortd, eburned. 



The muscular Ancillaria. Shell ovate, rather thin, 

 ventricose, orange-yellow or cinnamon colour, spire 

 very short, partially immersed, suture callously chan- 

 nelled ; aperture widely opened, columella slightly 

 twisted, ivory-white. 



Meuschen, Sow. Thes. Couch. Anc. p. 58. f. 30-32. 

 Ancillaria Mauritiana, Sowerby. 

 Ancillaria volutella, Deshayes. 



Hab. Madagascar; Mauritius. 



This well-known species, of light, iuflated growth, is 

 always distinguished by a peculiarly shining-white co- 

 lumella. 



November, 1864. 



