OBOLID^. 499 



In order to place these clearly before students, the origmal figures of Salter [Salter and Hicks, 

 1867, figs. 1-3] and Davidson [1871, PL XLIX, figs. 33 and 35] are reproduced on Plate XXIX. 



"Leptoholus gemm.ulus" Matthew [1903, p. 190] appears to be a true Lingulella and specific- 

 ally identical Avith L. ferruginea. It occurs at a iiigher horizon (Division 3c of Matthew's sec- 

 tion) than the typical forms of the latter in Wales and near St. John, New Brunswick, but 

 that is not surprising for a species which has so wide a geographic distribution. Only one 

 specimen from the tjqie locality at Navy Island, St. John, sent to me by Matthew, shows the 

 area and central groove of the ventral valve. In tho shales of his Division C3e on McLeod 

 Brook, Cape Breton, Mattliew collected a fine series of compressed and flattened shells that 

 he referred to "Leptoholus gemmulus." These shells appear to have tlie broad form as the 

 result of being flattened in the shale. The same changes occur in typical specimens of L.ferru- 

 ginea when flattened in the shales at Andrarum, Sweden. In tlie interbedded limestones they 

 are narrower and more convex. I note tlie same differences also in specimens from the shaly 

 sandstones of McNeil Brook, Cape Breton. The narrow, uncompressed forms are shown by 

 Plate XXXV, figures 4, 4a-b. In the same sandy shales occur .flattened shells that are as 

 broad as those referred to "Leptoholus gemmulus" Matthew [1903, p. 100] (PI. XXIX, figs, 

 lu and Iv). 



Lingulella lepis Salter, when uncompressed, has the broad form given to L. ferruginea 

 by compression, and would be compared with Matthew's "Leptoholus gemmulus" if the latter 

 were retained as a species. 



A species that appears to be identical with this occurs at Hastings Cove, St. John County, 

 New Brunswick, and a closely allied form, compared by Matthew [1895a, p. 115] with Lingulella 

 granmllensis, occurs in the "Protolenui beds" of Hanford Brook, St. John County, New 

 Brunswick. 



Linnarsson [1876, PI. Ill] gives several illustrations of a small Lingulella from the Para- 

 doxides beds. One of them (see PI. XXXI, fig. 3c) is an elongate form that may represent a 

 distinct species from the broader forms represented by Plate XXXI, figures 3, 3a, and 3b in 

 this monograph. A direct comparison between specimens from the limestones of Sweden 

 and Newfoundland leads to the conclusion that they belong to the same species. 



Kayser [1897, PI. VII, fig. 7] illustrates a species of Lingulella from Iruya, northern 

 Argentina, that he compares with L. ferruginea Salter. It certainly resembles that species 

 very closely, and -with our present knowledge of the wide distribution of L. ferruginea, I believe 

 we are justified in identifying the South American form as the representative of that species. 

 The figure given by Kayser [1897, PI. VII, fig. 7] is reproduced on Plate XXX. The associated 

 species given by Kayser [1897, pp. 277-281] are Liostracus ulrichi, L. steinmanni, L. sp., Agnostus 

 iruyensis, Lingulella cf. davisi, and Orthis saltensis. 



FoRMATio>f AND LOCALITY. « — Upper Cambrian: (3h) Shale and shaly limestone on McNeil Brook, 1.5 miles (2.4 

 km.) east of Marion Bridge; (307 [Matthew, 1903, p. 192]) shales of Division C3c of Matthew, on McLeod Brook (=Bara- 

 chois River); and (307a [Matthew, 1903, p. 240]) shales of Division C3c2 of Matthew, on McLeod Brook (=Barachoi3 

 River), near Boisdale; all in eastern Cape Breton, Nova Scotia, Canada. 



(308 [Matthew, 1892, p. 41]) Shales of Division C3c of Matthew at Navy Island, St. John Harbor, St. John County, 

 New Brunswick, Canada. 



(3) Shaly limestones 300 feet (91.4 m.) above the Paradoxides zone, Manuals Brook, Conception Bay, Newfound- 

 land. 



(310d) Ceratopyge slate at Borgholm, Oeland Island, Sweden. 



(389d [Kayser, 1897, p. 280]) Iruya, Province of Salta, Argentina, South America. 



Middle Cambrian: (3i) Compact, fine-grained, thin-bedded, gray sandstone of the Paradoxides zone, on McLean 

 Brook, 1 mile (1.6 km.) east of McCodrum Brook, and 1.5 miles (2.4 km.) west of Marion Bridge, eastern Cape Breton, 

 Nova Scotia, Canada. 



(2s) Limestone in upper part of Paradoxides zone, at Hastings Cove [Matthew, 1898b, p. 38], on Kennebecasis 

 Bay, 0.5 mile (0.8 km.) northeast of Torryburn, on the Intercolonial Railway northeast of St. John; (2i) sandstones 

 of Division lb3 of Matthew's [1895a, p. 108] Protolenus zone, on Hanford Brook; and (21) limestone at the base of 

 the Paradoxides zone [Matthew, 1895a, p. 108]; all on Hanford Brook, St. John County, New Brunswick. 



(301 1) Shales of Division Id of Matthew on Porters Brook, St. Martins; (2m) shales near the base of the Paradoxides 

 zone on Hanford Brook; (301k) St. John formation in the city of St. John; (301Ii) shales of Division Ic of Matthew, 

 on Hanford Brook; (301g) sandstones of Division Ic of Matthew, at Portland (now a part of the city of St. John); and 



o This species also occurs at Localities 318u and 3187, p. 249. 



