180 



MR. C. THOMPSON OX THE 



[June 19 13, 



VII. 



Lists or Derived Cephalopoda fouxd ts the 

 Glacial Drift of Holderxess. 



Preliminary x^ote. 



The following lists are all arranged in approximate strati- 

 graphical order. They are intended to show what has been found, 

 rather than the exact horizon from which each species has been 

 derived. 



"With regard to the division of the Lias into Lower, Middle, and 

 Upper, I follow Tate & Blake, for the limits of their divisions of 

 the formation fit in more exactly than any other classification 

 with the results of this research. 



All the ammonites marked with an asterisk have been named 

 by Mr. Buckman. 



Lower Liassic Ammonites. 



*Psiloceras (!) hagcnowi (Dunker- 



Quehst.). 

 *Psiloceras cf. brevicellatum Poui- 



peckj . 

 *Ps. erngafum (Bean-Phillips). 

 *Ps. erugatuin 1 (Bean-Phillips). 

 *Ps. cf. law (Quenst.). 

 *Ps. cf. plicatum (Quenst.). 

 *Ps. provinciate ? (Quenst.). 

 *Ps. cf. psilonotus (Quenst.). 

 *Psiloceras sp. nov. 

 *Caloceras allasii (Brown). 

 *C. beloheri (Simp.). 



C.johnstoni (Sow.). 

 *C. laquem (Quenst.). 

 *C. cf. laquem (Quenst.). 



Schlotheimia angulata (Schloth.). 

 *Schl. exechoptyeha (Wahn.). 

 *Schl. striata (Quenst.). 

 *'Schl. trapezoidalis (Sow.). 

 *Schl. aff. ventricom (Sow.). 

 *Schl. spp. nov. (2). 



Coroniceras gaudryi (Reynes). 

 *C. gmuendense ? (Oppel). 

 *C. aff. Tcridion (Ziet.). 

 *C. lyra Hyatt. 

 *G. rotator (Reynes). 

 *C. cf. rotator (Reynes). 



C. rotiforme '! (J. de C. Sow.). 

 *C. schlcenhachii '! (Reynes). 

 *■(:. spinaries (Reynes) non Quenst. 

 *C. trigonatum Hyatt. 



Mtoinoceras scipionianum (d'Orb.). 



M. simpsoni (Bean) (in Simpson). 

 *Agassiceras dal'eres (Reynes). 

 * A. personation (Simp.). 



A. sauzeanum (d'Orb.). 

 *A. aff. sauzeanum (d'Orb.). 

 *A. spinaries (Quenst.). 

 *A. aff. transformed um (Simp.). 



Mieroderoceras birclii (Sow.). 

 *M. aff. birchi (Sow.). 



Xipheroceras aureum (Y. & B.). 

 *X. planicosta (Sow.). 



X. aff. planicosta (Sow.). 



X. scoresbyi (Simp.). 

 *Ar/doccras cuneiforme Hyatt. 

 *A falcaries Hyatt non Quenst. 

 *A. falcaries (Quenst.). 

 *A. geomelricum (Phil.). 

 *A. hartmanni (Oppel). 

 *A. kridioides Hyatt. 

 *A. miserabile (Quenst.). 

 *A. semicostatum (Y. & B.). 

 *A. semicostatum (Blake). 

 *Arielites brooJci (Reynes). 

 *A. aff. brooJci (Sow.). 

 *A. choffati Pompeckj. 

 *A. aff. collenoti (d'Orb.). 

 *A. impendens (Quenst.) non Y. & B. 

 *A. plotti (Reynes). 

 *A. aff. turneri (Sow.). 

 -*Arietites sp. nov. 



Asteroceras acceleratum Hyatt. 



A. obtusum (Sow.). 

 *A. sagittarium (Blake). 



A. stellate (Sow.). 

 *Verraiceras mandubium (Reynes). 



V. spiratissimum (Quenst.). 



Microccras gagateum (Y. & B.). 

 * Oxynoticeras jiavum (Simp.). 

 *0. spp. nov. (2). 

 *Echioceras costidomus (Quenst.). 

 *E. edmundi (Dura.). 

 *E. microdiscus (Quenst.). 

 *E. robustum (Quenst.). 

 *Eckioce?-as spp. nov. (2). 

 *Echioceras sp. 

 *Cf. Echioccras neglcctum ! (Simp.). 



