28 MUBBX. 



124. dnicoenus, f. 87, Reeve. — Testa M. Nuttalli sirnilis, 

 sed brevior, dente marginali valde producto, varicibus baud 

 expansis. — Resembling tbe darker variety of M. Nuttalli, but 

 broader, witb no expansion of tbe varices. 



125. monocekos, f. 86, Sowerby. — Testa griseo-subviridis, 

 spiraliter costata et striata, trapezoidea, spua pyramidata, 

 anfractibus angulatis ; inter varices bituberculatis, varicibus 

 tribus crassis ; apertura oblonga, labio externo intus incrassato 

 quadridentato, margine unidentato, canali brevi. — Quite dis- 

 tinct from M. Nuttalli, baving two rows of tubercles between 

 the varices and scarcely any expansion of tbe varices. 



126. coeeanicus, f. 131, A. Adams. — Testa ovata utrinque 

 subacuminata, laevis trivaricosa fulva, castaneo evanide 

 fasciata, varicibus extantibus lobatis, superne expansis 

 elevatis, infra prope terminum canalis discontinuis ; apertura 

 ovata intus pallirle rosea, labio externo intus incrassato, 

 quinque-deutato, dente marginali prominenti. — Of an oval 

 form, pyramidal at each end with lobed and slightly banded 

 varices. 



127. HEMiTEirTEEUs, f. 109, Lamwck. — Testa angulatim 

 pyriformis, pallide fulva, medio subcastanea, spiraliter costata, 

 inter varices uuituberculata ; anfractibus angulatis ; varicibus 

 tribus crassis costatis, infra anguste fimbriatis ; apertura 

 subovata, intus trifasciata ; spira brevi, canali attenuate — 

 More angular and inversely pyramidal than M. lingua-ver- 

 vecina. The varices, particularly the last, are slightly fringed 

 on the canal. 



SECOND DIVISION. (Four or more varices.) 

 Sect. VI. Clavata, spinous or tubercular. 



128. cobnutus, f. 166,* Linnceus. — Testa magna clavi- 

 formis, superne ventricoso-subglobosa, spiraliter bicostata et 

 interlirata, medio lseviuscula, cinereo-fusca, interdum zonata, 

 ve\ fulvo-lactea; varicibus septenis subcomplanatis spiniferis; 

 spinis duobus longissimis, irregulariter arcuatim-recurvis, ad 

 canalem una vel duabus ; apertura postice canaliculata, labio 

 interno antice laminatim producto, labio externo intus crenato 

 margine biangulato, producto ; spira brevissima, sutura pro- 

 funda, canali longissimo. — There is no mistaking this long 

 horned long channelled seven-variced shell. 



