446 G. C. Crick — Cephalopods from the Tyrol. 



metamorphosed fossiliferous Lower Lias, and indicated the same on 

 the map accompanying his work. The only Cephalopods mentioned, 

 however, were Belemnites, stated to be easily distinguishable by their 

 structure, though sometimes broken and their parts displaced. 



Visiting the locality subsequently, Rothpletz ^ found there rocks 

 containing Brachiopods, Lamellibranchs, and Corals, which he regarded 

 us of llhsetic age, whilst in an overlying limestone, which Pichler 

 considered to be of Lower Liassic age, he found only Pentacrinus 

 ossicles, which, in his opinion, might belong to either Winkler's 

 Pentacrinus havaricus of the Kossener Schichten, or to the Pentacrinus 

 psilonoti of Quenstedt from the Lower Lias. In reply to Rothpletz's 

 inquiries Pichler stated that he could not remember the Belemnites, 

 but only two Ammonites " {radians !) ", - which he found in this grey 

 limestone thirty-four years ago; also that he sent these specimens 

 to the Geological Survey of Vienna, where, according to Rothpletz, 

 they appear to be now unknown. 



Although it is much to be regretted that the present specimens are 

 very imperfectly preserved, it seems desirable to record them, since 

 they serve to show the presence of a Cephalopod fauna on the Tarntaler 

 Kopfe, and it is hoped that other examples may be obtained which 

 will indicate the precise age of the beds yielding these fossils. It may 

 be mentioned that the Ammonite found by Dr. Young differs entirely 

 from Ammonites of the radians type. 



It may be noted that on the highest part of the Kesselspitz 

 (2722 metres above sea-level), some 16 kilometres west of the Tarntal 

 mass, Professor Freeh ^ records, above the Rhsetic, the existence of 

 Liassic beds containing indeterminable Belemnites, Aulacoceras, and 

 Ammonites referable to the genera Lytoceras, Arietites, and Phylloceras. 

 From the Aulacoceras, which he compared with ^. liassicum (Grumbel), 

 as figured by Mojsisovics* (p. 55, pi. iv, fig. 4a), together with an 

 Arietites, he regards the fauna as Lower Liassic. The absence of 

 Psiloceras and Schlotheimia, genera characteristic of the Hettangian, 

 or lowest part of Lower Lias, is noted. 



EXPLANATION OF PLATE XXVI. 



Fig. 1. AVeathered surface of slab of limestone, exhibiting an Ammonite 

 (? Arnioceras) ; from the Tarntaler Kbpfe, in Tyrol. Five-sixths 

 nat. size. 

 Fig. 2. "Weathered surface of a fragment of limestone showing Belemnite in 

 section ; from the same locality. Five-sixths nat. size. 

 Both specimens were collected by Dr. A. P. Young, F.G.S., who has presented 

 them to the British Museum (Natixral History) . 



^ A. Rothpletz, JEin geologischer Querschnitt durch die Ost-Alpen, etc., 1894, 

 pp. 74, 75, and 83. 



- The triAaal name radians has been appKed by different authors to various 

 Toarcian and Bajociau species of Ammonites. For synopsis of these species see 

 S. S. Buckman, Mon. Inf. Ool. Amm. (Pal. Soc), pt. iv, 1890, pp. 188-90. 



3 F. Freeh, " Gebirgsbau der Tiroler Zentralalpen mit besouderer Rucksicht auf 

 dem Brenner": Wissenschaftliche Erganzungshefte zur Zeitschrift des D.u. 0. 

 Alpenvereins, Bd. ii, Heft i, 1905, pp. 1-98. 



* E. V. Mojsisovics, " Ileber das Belemnitiden-Geschlecht Aulacoceras, Fr. v. 

 Hauer": Jahrb. d. k. k. geol. Reichsanst., Wien, Bd. xxi, 1871, pp. 41-58, 

 pis. i-iv. 



