240 CLASS III. GASTEROPODA. ORDER VII. PECTINIBRANCHIATA. 
Ph: COLXXI. Fig. 8: 
Exsurna sprrata, Lamarck, Anim. sans vert., vol, vii. p. 282. Encyclo- 
pédie Méthodique, pl. 401. f.2.a,b. Kiener, Iconographie des Co- 
quilles vivantes, pl. 1. f. 1. 
Buccinum spiratum, Linneeus. 
Nassa umbilicata, Martini. 
Pl. CCLXXI. Fig. 4. 
Esurna VacentTiana*, Swainson, Zoological Illustrations, vol. iii. 
pl. 144. 
Pl. CCLXXI. Fig. 5. 
Exsurna Lutosa, Lamarck, Anim. sans vert., vol. vii. p. 282. Encyclo- 
pédie Méthodique, pl. 401. f.4.a,b. Kiener, Iconographie des Co- 
quilles vivantes, pl. 3. f. 6. 
ANCILLARIA, Lamarck. 
Testa polita, oblonga, subcylindrica, basi effusa, nonnunquam emargi- 
nata, varice subobliquo ornata ; spira aut brevi, aut elongata, suturis 
feré oblitis, anfractu ultimo inflato, raro umbilicato ; apertura ampla, 
plus minusve dilataé; columella tumida, callosa, leviter tortuosa ; 
labro externo tenui, simplici, acuto. Operculum tenue, parvum, 
acuminatum. 
The genus Ancillaria was instituted by Lamarck for the reception of a 
small group of mollusks allied to, and greatly resembling the Olive ; their 
shells are, however, wider and more expanded towards the base ; the last 
© The author of the ‘ Iconographie des Coquilles vivantes’ disposes of those very remark- 
able species, the Eburne papillaris and Valentiana, the ornaments of our cabinets, by quoting 
them as accidental varieties of the common Hburna spirata ; a circumstance which strongly 
proves the injudicious policy of registering opinions that are formed from the mere examination 
of a drawing. His remarks in regard to Sowerby’s Hburne plumbea and australis are better 
entitled to consideration; indeed we think with him that they are not Hburne at all. 
