24 O HOY AL SOCIETY OF CANADA 



Koken ^ appears to have had in mind specimens presenting this 

 combination of characters in proposing the name Tentaculites 8chlo- 

 theimi, Koken, and writing the following definition. 



" Tentaculites grosser, (than 'T. acuarius Eichter of the middle and 

 npper Devonian) Ausser den Ringwulsten feine Querstreifung. 



" Tentaculites Schlotheimi, Kohen (= .Te-ntculites annulatus, 

 Sclilotheim, pp.) Tentaculites scalaris autt. non Sclil. Spinferen 

 Sandstein, ohere Kotlenz-schichten." 



'The Silurian form called by Koken " Tentaculites anntdatus v. 

 Schloth. {non McCoy) " differs from the Devonian form by absence of 

 thei fine concentric striae ("ohere zwischen ringe,") this is the form 

 called Tentaculites scalaris by Schlotheim. 



'The Côte St. Paul form shows the " feine Querstreifung " by which 

 T. sclilotlieimi is distinguished. 



The species T. elongatus, Hall, agrees with T. sclilotheimi in these 

 describetl characters but appears to be a still larger species. If the size 

 be regarded as significant, the Côte St. Paul specimens may properly 

 be called T. sclilotheimi Koken; on the other hand if we consider the 

 two co-specific then Hall's name Tentaculites elongatus will stand and 

 T. sclilotheimi will be a synonym. In order to express the smaller sized 

 specimens of Côte St. Paul, and Chapman, and the 'smaller specimens 

 from the Grande Grève limestone called .T. elongatus by Clarke, the 

 name Tentacidites scliJotlieimi, Koken, will be here used. 



In Lethœa geognostica 2 the species T. sclilotheimi, Koken, is i"!?- 

 corded by G. Gitrich as occurring in the polnischen section in the fauna 

 of the lower Devonian formation "No. 7 Spiriferen sandstein" of 

 Miejska and AVismowka Gora, which is equivalent to the " Obère Coblenz- 

 schichten." Also in the middle Devonian formation " No. 9 Hofizont 

 von Dombrowa," which is equivalent to the " unte. Calceola Schichten 

 bei Eohr i.d. Eifel," thus showing a range of the characters from Lower 

 to Middle Devonian as underatood m Europe. 



4. cf. Avicula textilis, Hall. 



Under this name I have listed a fragment of an aviculoid shell, 

 which in surface form and the surface marking resembles Hall's figures 

 of Avicula, textilis; but the specimen is too imperfect for determination 

 of its outline and hence it i's difficult to determine what were its exact 

 specific characters. It is certainly an aviculoid shell approaching in size 

 and general form .4. textilis of the Lower Helderberg. 



1 Koken, E., Die Leitfossilien, 1S96, p. 540. 



2 Freeh, F., Lethsea geognostica, Lethsea pa]a?ozoica, 2. Band 1902, p. LSI. 



