PLATE XX. 



Figure I, Tnini-dlulimi lohaliild (Walkor and Jainbi 1>'< )rl)ic,'ny. Vfutral view. '< SO. 



■_'. TnniniluJinn hilidhili: i Walker and Jaciibi D'(!)rbigny. Apertiiral view of another specimen. 



:i. TnnirdliiliiKi hibiiliild { Walker and .lacoli) D'Orbigny. Dorsal view of nnollier .s|iecimen. X 80. 



-I. 'rniiirdliiliiiii hiiiiniii'iixis ('ushnian, n. .sp. Dorsal view. X SO. 



•"). 'J'i'iniciiliiliiiii biiniiiKiisix {\is\imA.n. n. sp. Apertural view of another sjiecimen. % Si). 



(1. Till neat iilina liiiniiiinixis Cushman, n. sp. Ventral view of a young specimen, showing the ]icculiar lo 



bes 

 at thi' liasc of till- chambers. 

 Tnnu-iiliiliiin ihiiiriniiia (.'iishman. n. s|i. Ventral view. X 80. 

 Tiiinialiilina (iiinriiiiiiii Cushmnn, n. sp. r>orsal view of another specimen. X SO. 

 Tnniralidina pscudoawjcriuna Oushman, n. sp. Ventral view. X 100. 

 114 



