CANCELLARIA. 



Species 53. (Kig. a, b, Mus. Cuming.) 



Cancellaria excavata. Cu)i. testa oblongo-ovald, teniii- 

 culd, minutissimi uvibilicatd, apird turritd, ncutd, an- 

 fractibus ad suturam late profunde excavatis, ad an- 

 gulum carinatis, deinde planulatis, leevibm, nitenlibus ,- 

 pellucido - alia ; aperturd subgicadrato - ovatd, ftmce 

 tenuiliratd, columelld arcuatd, tripUcatd. 



The excavated Cancellaria. Shell oblong-ovate, 

 rather thin, very minutely umbilicatcd, spire turreted, 

 sharp, whorls broadly deeply excavated at the suture, 

 keeled at the angle, then flattened, smooth, shining ; 

 transparent white ; aperture somewhat squarely ovate, 

 finely ridged within, columella arched, three-plaited. 



SowERBY, Pro. Zool. Soc. 1S48, p. 137. 



Ilab. South Australia. 



This very delicate transparent white Eljurna-\\\:.6 species 

 is remarkably characterized by its very broad and deeply 

 excavated sutiiral channel. 



Species 54. (T'ig. a, b, Mus. Cuming.) 



Cancellaria articularis. Can. testd ovato-coiwided, 

 anguste j)rofunde umbilicatd, spird acute exsertd, aii- 

 fractibus ad suturam anguste subprojunde excavatis, 

 deinde convexia, oblique longitudinaliter subtiliter cos- 

 tatis, spiraliter obscure liratis, costis minute nodula- 

 tis, nodulis ad unguium prominent ior ibus ; livido- 

 carned, nodulis albidis ; aperturd trigono-oviUd, sub- 

 expansdyfauce valide liratd, columelld tripUaiUi. 



The articulated Cancellaria. Shell ovately conoid, 

 narrowly deeply umbilicated, spire sharply exserted, 

 whorls narrowly rather deeply excavated at the su- 

 ture, then convex, obliquely longitudinally finely 

 ribbed, spirally faintly ridged, ribs minutely noduled, 

 nodules more prominent at the angle ; livid flesh- 

 colour, nodules whitish ; aperture triangularly ovate, 

 rather expanded, interior strongly ridged, columella 

 three-plaited. 



SoWERBY, Conch, lllust. sp. 34. f. 32. 



flab. Ceylon; Dr. Sibbald. 



,\. most elegantly sculptured species, with somewhat of 

 the general aspect of a Nassa. 



Species 55. (Fig. a, b, Mus. Cuming.) 



(Cancellaria piscatoria. Can. testd ovatd, oblecte 

 umbilicatd, ad basin avbcontortd, spird ultenuaid, an- 

 fractibus superne excavato-angidatia, ad angulum mu- 

 ricato-nodulatis, deinde convexli, liris muricatis, de- 

 cussatis ; cinereo-albd, livido-olivaceo tinctd et nebii- 

 laid, columelld arcuatd, obscure uniplicatd. 



The fishermen's Cancellaria. Shell ovate, with a 

 covered umbilicus, somewhat twisted at the base, 

 spire sharply attenuated, whorls excavately angled at 

 the upper part, prickly noduled at the angle, then 

 convex, decussated with prickly ridges ; ash-white, 

 stained and clouded with livid olive, columella arched, 

 obscurely one-plaited. 



Buccinum piscatorium, Gmelin, Syst. Nat. p. 349G. no. 

 116. 



Cancellaria piscatoria, Deshayes. 

 Cancellaria nodulosa, Lamarck. 

 Nassa nodosa. Martini. 

 Le Solat, Adanson. 



/[ab. Mouth of the Gambia, ^Yest Africa. 



A somewhat abnormal form of the genus, with only a 



single indistinct plait on the columella. 



Species 56. (Fig. a, b, Mus. Cuming.) 

 Cancellaria spirata. Can. testd ovatd, minute super- 

 ficialiter umbilicatd, spird breviusculd, acuta, anfrac- 

 tibus plano-convexis, ad suturam. profunde excavatis, 

 prope apicem longitudinaliter costatis, ad basin spira- 

 liter striatis ; albidd, oarneo-tinctd, ad angulum ma- 

 culis aurantio-rujis cingulatd ; aperturd ovatd, fauce 

 valide liratd, columelld arcuatd, tripUcatd. 

 The spiral Cancellaria. Shell ovate, minutely super- 

 ficially umbilicated, spire rather short, sharp, whorls 

 flatly convex, deeply excavated at the suture, longi- 

 tudinally ribbed near the apex, spirally striated at 

 the base ; white, flesh-tinged, encircled with orange- 

 red spots at the angle ; aperture ovate, strongly 

 ridged within, columella arched, three-plaited. 

 Lamarck, Aiiim. sans vert. vol. ix. p. 408. 

 Ilab. Garden Island, Swan River. 



This shell so nearly resembles the Eburna australis that, 

 as we have shown in speaking of that .species, it has been 

 confounded with it by very high authorities. The pre- 



Novcmber, 1856. 



