= Re 
Yoldia (Yoldiella) dicella, Acapulco, 
_ — leonilda, Panama, 
Malletia inæqualis, détroit de Magellan, 
—  peruviana, Pérou, 
—  truncala, Panama, 
--  (Minormalletia mov. sect.) arciformis, Acapulco, 
-- _ benthima, id., 
Tindaria compressa, Pacifique, 
—— salaria, id., 
— panamensis, Panama, 
—— atossa, id., 
— smirna, id., 
— mexicana, Mexique, 
— thea, Pérou, 
Phaseolus (Silicula) patagonicus, Patagonie, nn. spp., 
Limopsis (Empleconia mov. seet., type: L. vaginatus Dall), 
— zonalis, Panama, 
— diegensis, Californie, 
— mabilliana, Chili, 
— stimpsoni, Panama, 
_ juarezi, id., 
— diazi, Acapulco, 
Arca (Bathyarca) nucleator, Panama, 
_ —- (corpulenta var.?) pompholyx mn. var., Paci- 
fique, 
—  (Cucullaria) endemica, id., 
Pecten (Pallium) miser, Panama, 
—  (Chlamys) pasca, Easter Island, 
—  (Pseudamusium) liriope, Panama, 
— — neoceanicus, Pacifique, 
— — polyleptus, Galapagos, 
— _ panamensis, Panama, 
—  (Cyclopecten) rotundus, id., 
_ — cocosensis, île des Cocos, 
Amusium (Propeamusium) malpelonium, Panama 
Lima (Acesta) diomedæ, Galapagos, 
—  (Limatula) similaris, Panama, 
— — suteri, ile Stewart, 
