4BT.21 OEDOVICIAlSr TEILOBITES ULSICH 15 



marks included in the description of T. hipimotaPus^ which is the 

 name given to this second American relative of T. mohergi. The 

 Swedish species is referred to also in the descriptions of T. prattensis 

 and T. transversuis, both of which, though more obviously different, 

 I believe to be as near if not even closer allies of T. mohergi than is T. 

 hipunctatus. 



If Hadding's description of T. mohergi were in English it would 

 be quoted here. But my acquaintance with the Swedish language is 

 too limited to warrant an attempt to translate it, so the illustrations 

 which are photographically reproduced here must suffice for the 

 present. 



Occurrence. — Lowest beds, {Climacograptus putillus zone), of the 

 Ogygiocaris shale, Anderson, Jiimtland, Sweden. 



TELEPHUS LINNARSSONI, new species 



Plate 2, Figures 15-17 



TelepJius wegelini Angexin, Warburg, 1925, Trilobites of the Leptaena 

 limestone in Dalarne, p. 90, pi. 1, figs. 16-18. 



This name is proposed for an imperfect cranidium supposedly col- 

 lected by Linnarsson from the Leptaena limestone in Dalarne, 

 Sweden, and which, according to Warburg, he evidently regarded as 

 a new species and labeled Telephus superstis. Warburg,^^ however, 

 was unwilling to accept Linnarsson's opinion, being persuaded that 

 the observed differences between the Leptaena limestone specimen and 

 those found in the underlying Black Trinucleus shale that are identi- 

 fied by Hackling and other authors with Angelin's T. wegelini are due 

 mainly to distorting compression of the latter. To what extent 

 Warburg's view of the systematic relations of the concerned speci- 

 mens is warranted I am, of course, not prepared to say. But, as- 

 suming that the illustrations given by Hadding of typical T. wege- 

 lini and those of the Leptaena limestone specimen by Warburg are 

 essentially correct, comparison of these brings out certain differences 

 that after considerable experience in evaluating the effects of dis- 

 tortion of fossils by either vertical or lateral compression of the 

 matrix seem to me unlikely to have been produced by such causes. 

 For instance, the relative straightness of the anterior part of the 

 outline, the protrusion of the two median denticles, the straightness 

 of the posteriorly converging palpebral bands, and the truncate-coni- 

 cal rather than truncate-ovate outline of the glabella — all as seen 

 in dorsal views of the cranidium of typical T. wegelini — could hardly 

 have been produced by vertical compression of specimens precisely 

 like that of the Leptaena limestone illustrated by Warburg. In the 



" Trilobites of the Leptaena limestone in Dalarue, 1925, p. 90. 



