'21 V HArri.lTKS, < YRTOCHILUS. 



Family II. AMMOMTIPJ-:. 



The lobes :ind saddles of A imnonites are figured in pi. 103. 

 figs. 565-567; pi. 104. figs. f>ns-f)70. 



Genus BACULITES, Lam. 



Shell straight, elongated, conical ; suture foliately lohed : last 

 i-haniber large ; margin of aperture dorsally produced. 



Fourteen spcc'u-s. Cretaceous. Europe; Chili; India: 

 United States. 



The baculite limestone of Normandy is so called from the 

 numerous remains of the shells of this animal which it contains. 



B. ANCEPS, Lam. t'l. loo. fig. ;V2:j. Fra, ><>>. 



l'. HACULOIDES. d'Orb. PI. 100. fig. 524. 



Conrad has given the name GycloceraB to a Baculite figured 

 1>\ him, but without generic characters; after wards, finding that 

 name preoccupied by McCoy, he <-h:mo V <l jt to Ci/cloiiH'ra. still 

 giving no diagnosis. 



Meek divides Baculites into two subgeneric forms, which, he 

 remarks, are possibly distinct genera. 



1. Baculites, Lam. (t.vpk-al). 



a. Shell straight throughout; aperture directed f'orwnrd ; lip 

 with lateral sinuses directed backward; the projection of its 

 siphonal iu:irgin, straight, and its ant isiphonal niMrgin convex in 

 outline; interior without regulai'ly disposed i-idgcs. Type, l*>. 

 \ KIITEBRALIS, Lain. 



(?) b. Shell straight posteriorly, but with the non-sept ale p:irt 

 gently ai'cuate; aperture a little obli(pie ; appendage ol'siphon:d 

 side of lip arching slightly with the general curvature of the 

 non-septate part, but not curving over the aperture. 1>. I.NCI K- 



VATUS. Dujardin. 



2. Cyrtochilus, M.-ck. 



Shell straight ; aperture opening towards the an tisi phonal side, 

 and the lateral sinuses of the lij) i-\c:i\ :iteil in the opposite direc- 

 tion; projection of siphonal margin of lip abruptly arching over 

 the aperture, and the ant isiphonal margin of same deeply sinuous 

 instead of convex in outline; interior with regularly disposed 

 ridges, leaving oblique constrictions on internal casts. II AAMTKS 



I'.ACI LOIDKS. Mailtell l>. o];|.|()| ATI S. Soxvb. 



