238 



THE CANAniAN NATl RAI.IfeT. 



[\'ol. vii. 



Va. 



^^ (T^ 



rjanuB fiYJiorKRAS. 



14. (i, Nl'MA. — Tlio (inly siK'ciniaii of tlii?* spccicp in the col- 

 lection is a c.iKt of tlio inttrior, wliieli is siilFRioiitly iieilVct to 

 ^ivc us the iminbcr of the whorls iiiid their forui, but does not 

 hhow tiie (listaiice of tlio fcpta from each o(lu;r. nor the positioa 

 of (he Miphuncle. SIk 11 l.iru)' coiifif'tinir of about three whorls,, 

 all ill cunt ict, except a suuill jioriinn of the list one at the aper- 

 ture, which is <liMiij:aucil. 'I'lic (lorso-V(^iitr;)l tlianieter of the 



(fBi^. ^^^'^'^^wholo coil iti about 10 indies; of the two first whorls about \\\ 

 ^Q^tuC-e^^-^ inches. The tran^erse (liaujeter of the tlsinl whorl at its smaller 



extremity in 30 lines; dor«o-veiitr.il diamc "r of the same about . 

 21 lines. The dorso-ventral diaui"ter of the last whorl at about 

 the point where it becomes scjiirateil is 4 inches, but as only a 

 part of the transverse section of this whorl is se(^n, and the shell 

 appears to have been compressed laterally, this dimension may 

 be too great. On the ventral side of the last wliorl there is a 

 wide, slii^htly depressed furrow alonj; the median line. This 

 also may be the result of pre.ssure. On a part of the second 

 whorl, six or seven shallow rounded ajinulations are indicated,' 

 each of thcui two or three lines wide, and sep.irated by groove^ 

 of the same width. A fracture in one place shows that the sept* 

 are deeply concave. As the aperture is broken away, it cannot 

 bo determined how much of the last whorl is fruc in the perfect 

 fossil, but judging froui appearances I should say not much more 

 than two inches. Corniforous. , ^ ' . . 



-, •■■■<, .,.,' (■> ifi ,q v-i Josj^ 



Genus Orthocer.\s. ''^'^ 



— 15. 0. An AX. — Shell about 'I feet long and from 3 to 3^ inches 

 in diameter at the aperture. Septa from G to 8 in a length of 2 

 inches, where the diameter is 18 lines. Siphuncle nearly central, 

 cylindrical or nearly so, 2 lines in thickness where the diameter 

 of the shell is IG lines. 



The best specimetis in the collection, (those from \\ to 2 fset 

 in length) show none of the septa except in the 5 or G inches of 

 the smaller extremity. One oidy, shows a single septum which 

 is h\ lines deep where the diameter is 2^ inches. In the same 

 locality, and in the same state of preservation, were found a 

 number of frajrnients in which there are 8 or 9 septa in a length 

 of 4 inches, where the diameter is between 2 and 3 inches. I 

 think thsse all belong to the same species. u.i^tk'^Mn^^\'i..'i0ixi{ 



