PLEUROTOMARIA. 395 



Pleurotomaria phyospira, Deslong. 



— subfasciata, d'Orb. (crenata, Deslong.). 



— cf. subdecorata, Miinster. 



— Alliea, d'Orbigny. 



Sub-section. — Whorls more angular, ornaments sometimes reticulate throughout; 

 sinus-band situate at the angle, and rather less median. 



Pleurotomaria sub reticulata, d'Orbigny. 



— textilis, Deslongchamps. 



Section 5. — Ornate. 



Shells turrited, trochiform, turbinate or discoidal, with great range as to size ; 

 always umbilicate, often largely so. Whorls usually angular and carinated with 

 sutures often canaliculate. The ornamentation is rich, with extensive and varied 

 tuberculatum on the carinas. The sinus-band, except in PL ornata, Sow., is very 

 wide, nearly median, flat or rarely projecting, and in the later whorls without 

 much spiral striation. 



Pleurotomaria pane i striata, d'Orbigny. 1 



t, , t\ i i i Proteus-group. 



— Proteus, Deslongchamps. I & l 



— armata, Miinster. 



— cf. Sauzeana, d'Orbigny. 



■ — tuberculosa, Defrance. \ 



— ornata, Sowerby. 1 Ornafa-gronp. 



— ornata-depressa, sp. no v. 



— Actsea, d'Orbigny. 



— oxi/tera, sp. nov. 



— Baugieri, d'Orbigny. 



— actinomphala, Deslongchamps. 



— Mopsa, d'Orbigny. 



■ — ruirabilis, Deslong. (micromorphic variety). 



Sub-section. — Shells turrited, attaining a great size, umbilicus small or nil. 

 Whorls subtabulate with rich sculpture, and often much tuberculate ornament on 

 the carinas. 



Pleurotomaria subaraneosa, sp. nov. 



— cf. araneosa, Deslongchamps. 



