36 MDREX. 



spiraliter scabroso-lirata et interstriata, inter varices interiliim 

 plana, interdum tuberculata, varicibus paucis vel numerosis, 

 ad angulum plerumque obtuse nodosis, interdum spinosis, ad 

 canalem liberis ; anfractibus uniangulatis vel obtuse bian- 

 gulatis ; canali brevi latissimo, pone concavo. — The figures 

 represent the extreme variations of this variable Mediter- 

 ranean shell. 



164. Yoldii, f. 210, March. — Testa M. trunculo similis, 

 sed crassissima, brevi, angulata ad angulos prsecipue tuber- 

 culata. — It is doubtful whether this very thick and angular 

 shell may not be a form of M. trunculus. 



165. Boukgeoisi, f. 184, Crosse. — Testa rugosa, breviter 

 subfusiformis, fulva, ad varices dense fuscata, spiraliter costata, 

 et striata inter varices plicatim unituberculata, varicibus 

 irregularibus, quaternis aut quinis crassis, breviter frondosis, 

 frondibus dentato-foliaceis, una ad angulum magis conspicuis ; 

 spira producta, anfractibus angulatis; apertura subrotunda, 

 alba, margine externo laqueato, intus dentato, canali brevis- 

 simo lato, bifrondoso. — First known as a fossil, but now 

 plentifully collected in a recent state; more fusiform and 

 frondose than 31. angularis. 



166. varius, f. 182, 183, Soiverby. — Testa angulatim 

 fusiformis, solida, scabra, fulva, spiraliter rubro-lineata aut 

 articulata, granoso-lirata, interdum inter varices tuberculata, 

 varicibus irregularibus, plus minusve frondosis, spira moderate 

 producta, anfractibus angulatis, interdum ultimo biangulato, 

 apertura subrotunda, canali lato, spinoso, brevi, superne 

 excavato. — The two figures present the extreme forms of a 

 species which greatly varies. 



167. Stainfoiithii, f. 158, Reeve. — Testa ovato-globosa, 

 albescens, spiraliter Urata ; varicibus octonis aut novenis 

 rotundis liratim frondosis, frondibus squamosis angustissimis 

 creberrimis, fusco-nigricantibus, canali lato, spira acuta, 

 anfractibus rotundis infra ad canalem umbilicatis ; apertura 

 rotunda aurea, labio externo intus crenulato. — The fronds are 

 squamose, narrow and close, giving the varices a beautiful 

 frizzled appearance. 



1 68. cuspidatfs, f. 203, Soiverby.— Testa gracile fusiformis, 

 utrinque acuminata, alba, varicibus canalique fuscis, spiraliter 

 subdistante lirata, varicibus septenis, frondibus aculeatis, 

 paucis, superiori acutissinja ; spira subproducta, anfractibus 



