6 JIUREX. 



brevi anfractibus angulatis; apertura subrotunda, margine 

 laminatim producto, rubro; canali elongate, attenuate, su- 

 perne subspinoso. — The inner lip forms a singular laminated 

 projection. 



Sect. II. As Sect. I., with exfoliations between spines 

 on varices. 



23. pliciferus, f. 36, 194, Sowerby. — Testa subfusiformis, 

 ventricosa, spiral iter granoso-lirata, inter varices angulatim 

 trituberculata, varicibus tribus ; spinis brevibus, acutis, cana- 

 liculatis, inaequalibus, ad angulum anfractuum una elongata, 

 varicibus supra angulum et infra aperturarn peculiariter 

 spinoso-membranaceis ; canali lateraliter recurvo insequaliter 

 postice trisjiinoso ; apertura majuscula ; spira producta, an- 

 fractibus subangulatis. — We have met with a large specimen 

 of this so much more developed than the one represented at 

 fig. 36, that we have thought it necessary to give the addi- 

 tional illustration, 1 94. A very remarkable peculiarity is the 

 spiniferous webbed appendage above the angle on the varices, 

 which the first specimen did not show so well. 



24. Beanii, f. 211, Bemardi. — Testa gracilis, eleganter 

 fusiformis tenuis fere alba, pallide fulvo trifasciata, trifariam 

 spinoso-costata, inter varices spiraliter striata, longitudinaliter 

 quinquefariam costata, costis distanter tuberculatis ; varicibus 

 tenuibus ; spinis fronte apertis, una superiori elongata, alteris 

 quatuor membranaceis, ad canalem duabus membranaceis ; 

 canali breviusculo, recurvo ; apertura ovata, margine pro- 

 ducto, labio externo crenulato ; spira canalem sequanti, an- 

 fractibus octonis, productis. — This remarkable shell is unique 

 in the collection of the late M. Taylor. The webbed charac- 

 ter of the spines on the lower part of the varices gives it a 

 certain resemblance to M. pliciferus, from which, however, 

 it is quite distinct. 



25. formoscs, f. 6, Sowerby. — Testa breviuscula, trifariam 

 spinoso-varicosa, purpurea, spiraliter undulatim lirata, tri- 

 tuberculata, spinis una superiori elongata subarcuata, 

 medianis brevibus, inferioribus submembranaceis ; ad cau- 

 dam paucis brevibus, canali lateraliter recurvo, tenui. — 

 Tlus is certainly not, as Eeeve and Kiener have supposed, 

 the rarispina of Lamarck. There are some beautiful 

 specimens in the British Museum, in which the membrana- 



