PKRONOOERAH, PHY8ANOCERA8, ETC, 



p. Muled. Mini in :i Mii^le rotv. Septal |ohe \\illi numeroii- 

 pointed. deeplx ciil. irregularly shaped minor lobe-. A ln|oiniii:i I 



lobe \er\ deep. and IcVt'l With superior l;|!er;d lobe. Sipliolllll 

 *cell lolILl, aild Harrow. 



re,r. Middle and Upper Lias. 

 I). ZIPHIU8, Xiet. T. I 07. liii". <U 1. 



NO. KKAS. Abdomen depressed; pila- depressed; line.-ir 

 between the t iilxM'eK-s ; nsinilly. hnl not in \';i ri:i 1 >ly liil'iirented on 

 the Minimum. TnlxM-eles di'pi-csscd, oft (Mi olt u-e iijion the c 

 lint pointed nnd jironiiiKMil ii]M)ii the shell. Sept;i not clo-ely 

 ei'owdfd. :is in Derocer(W, or >u profusely bninehing. 



Middle Lias. 

 \\ MUTICUB, d'Orl). T. Ins. iio- s . <;-2i>. <;-2:;. 



FMinily Til VSA N( )1 D.K. This l-unily includes the Fiml.ri:iti. 

 Liu.'i'i. :md Heterophylli. which nu'ree in the tbliMccoii> ch;ir- 

 Meter of t he septa. 



Tins \NO. 1.1; \s. AhdoUHMi roiindeil ; whorls exposed : t he 

 en\ elopinent doe>- not e\t(Mid lutcrnlly over more th:in one-third 

 of c;ich intiM'ior whoi'l. Alxloiniiinl lobe about the same depth. 

 but narrower than the superior lateral lobe; the hitter is equally 

 divided by a peculiar minor cell of a lobiform aspect. The 

 siphonal cell is cuneiform, and the Superior and interior lateral 

 eelU equally divided. 



Middle and Upper Lias. 



T. FIMHKIATI s. Sowb. T. lnl. li--. .">:;^. .">:;'.>. 



KllAcocKRAS.t AbdoiiuMi rounded; sides of the whorls flat- 

 tened; envelopment extends over about two-thirds of each of 

 :he interior whorls, or entirely encloses them, covering up the 



umbilieiis. The lobes ami cells gradually decrease in si/.e in- 

 wardlx. and are remarkable for the profusion and peculiar folia- 

 ceoii-. aspect of the minor cells ( M-ction lleiernphylli). 



Middle and Upper Lias. 



II. IIKTKKolMlYU.l S. Sou b. T. I 111', fl--. .Ml. 545. 



1'rofe^Mi Meek includes a nunibi'r of American cretaceoii-. 

 species. 



. Hyatt, liiill. Mii^. C..iu].. X..o]., iii. :,;i. 

 ..f /'/ii/lt,,,-,-!''!*. Sui-ss. [hid. 



