NO.1220. CA.VBEIAX BRACHIOPODA—WALCOrT. 687 



the upper beds on Little Belle Island and Great Belle Island, Con- 

 ception Ba}^ Newfoundland. 



Several localities on ^McNeils Brook, 1 mile east of Marion Piridge. 

 especially about the mill pond. Ravine one-half mile north of McMul- 

 liii's. on crossroad to Boisdale railroad station. In ravine east of 

 railroad, just south of Barachois post-office. Upper Leitches Creek, 

 Cape Breton. Nova Scotia. 



OBOLUS (LINGULELLA) BORNEMANNI, new species. 



Liii(/i(l(t attenuaia Borxeman.v. Xova Acta der Kais. Leop.-Carol. Deutsch. Acad. 

 Naturf., 1891, LVL p. 4;m. pi. xix, iig^. 1-10. 



Form an oblong- oval, sharply pointed toward the beak, marked with 

 ooncentrie, fine stripes, mostly regular, often also with large irregular 

 concentric folds. Faint radial or longitudinal striation usually appears 

 distinctly on the middle of the surface. At the vertex there ismosth' 

 a distinct straight longitudinal impression. 



Shape greatly variable, often unsymmetrie; short-rounded- triangu- 

 lar or almost circular, or narrower and elongated; more or less arched, 

 or even flat. The long*-extended specimens resemble Z. acuminata 

 Conrad. Others agree perfectly with Murchison's original figures. 

 Others, again, may be compared with Z. davisii, and were at first 

 placed with that species. The simultaneous occurrence in enormous 

 multitudes and the numerous transition stages leave no doul)t that all 

 those forms belong to one species, and the middle type of them fits 

 best to Z. attenuata Sowerbv. Size, "2 to 9 mm. 



Occurrence. — Very common in the Cambrian strata of Canalgrande, 

 in 3'ellowish-brown slates not far from the buildings of Canalgrande, 

 in white-gray quartz sandstone in the valley of Gutturu Sartu, in 

 3^ellow sandstones with Archteocyathus of Punta Pintau and elsewhere 

 in Sardinia. 



The state of preservation is l)est in the slates, yet there the specimens 

 are mostly pressed flat. The specimens, existing in great numbers in 

 the sandstones, often still exhi])it their original arching, but the deli- 

 cate shells are ordinarily distorted in an irregular manner and ill 

 preserved. 



The above notes are taken from a rather literal translation of the 

 original description. 



Dr. Bornemann identified this species with Lhu/ala attenuata Sow- 

 erbv, on account of the resemblance in outline of many of the speci- 

 mens. Other specimens closely resemble 0. (Z.) acuminatum Conrad, 

 from the Middle and Upper Cambrian of North America. It is so 

 improbable that a species of this character should persist from Middle 

 Cam1)rian time to ]Middle Ordovician time that, notwithstanding the 

 resemblance, I think it is better to distinguish it from Z. attenuata 

 Sowerb}', and give a specific name that will not lead to erroneous 



