OBOLELLID^. 603 



Of this species Pompeckj [1896b, p. 603] writes: 



From Barrande's description and figure it is not quite easy to interpret this species. I have before me several 

 specimens of a brachiopod from Coulouma, in the Department of H6rault, which Miquel [1893,^ p. 9] mentioned as 

 "la Discina." I regard this south French form as belonging to the genus Acrothele, and believe that it is probably 

 identical with the species mentioned by de Verneuil, Barrande, and Barrois as occurring in Spain. 



Having before me the specimens which Miquel collected, and which I have named Acrothele 

 hergeroni (PI. LVIII), I do not tliink they can be considered the same as the form described 

 by de Verneuil and Barrande. (Compare PL LVII, figs. 7, 7a-b with PI. LVIII, figs. 6, 6a-c.) 



From Barrande's description and illustration the following note is written: The shell is 

 about as wide as long, suboval, with pointed beaks; valves moderately convex, with the ventral 

 a Httle more so than the dorsal. There is a small area on each valve, but no trace of a 

 triangular false deltidium. Beak of ventral valve with a minute pedicle opening. Surface 

 ■with fine, distinct, concentric strias. Substance of shell calcareous. 



A shell 13 mm. in length has the same width, and the tliickness of the two valves united 

 is 5 mm. 



Barrande thought that a new genus was indicated, but in the absence of interior characters 

 decided not to name the genus or species. The perforate ventral valve and area suggested 

 Siphonotreta to him, but the calcareous shell was opposed to it. 



I have referred the shell to the genus Botsfordia provisionally and named it after Barrande, 

 whose memory all paleontologists take pleasure in recaUing. 



The reference to Botsfordia is made on account of: (a) the subacuminate ventral valve 

 ■with minute pedicle opening above a false cardinal area unmarked by a false deltidium; (b) 

 the convex ventral and dorsal valve; (c) the tendency of Botsfordia pulchra Matthew to have 

 the substance of its rather thick shell replaced by calcareous matter. 



I have attempted to secure specimens of this shell, but unsuccessfully. Until further 

 information can be secured the present reference ■will serve to indicate the probable relation- 

 ship of the species. 



Formation and locality. — Middle Cambrian: (350 [de Verneuil and Barrande, 1860, p. 538]) Red limestone 

 of the Paradoxides zone, near Adrados, north of Sabero and Bonar, Cantabrian Mountains, Province of Leon, north- 

 ■western Spain. 



Botsfordia c^lata (Hall). 



Plate LIX, figures 1, la-q, 3, 3a-b. 



Orbicula cselata Hall, 1847, Nat. Hist. New York, Paleontology, vol. 1, p. 290, PI. LXXIX, figs. 9a-c. (Described 



and discussed as a new species.) 

 Obolella (Orbicula) cxlata (Hall), Ford, 1871, Am. Jour. Sci., 3d ser., vol. 2, p. 33. (Merely changes generic reference.) 

 Obolella cselata (Hall), Billings, 1872, Canadian Naturalist, 2d ser., vol. 6, No. 2, p. 218. (Merely changes generic 



reference.) 

 lAngulella csdata (Hall), Ford, 1878, Am. Jour. Sci., 3d ser., vol. 15, pp. 127-128. (Described and discussed.) 

 Lingulella cxlata (Hall), Walcott, 1886, Bull. U. S. Geol. Survey No. 30, p. 95, PI. VII, figs. 1, la-d. (Copies the 



first paragraph of Hall, 1847, p. 290, copies Ford, 1878, pp. 127-128, and discusses species. The specimens 



represented by figs, lb and Id are redrawn in this monograph, PI. LIX, figs. Ic and lo, respectively.) 

 Lingulella cselata (Hall), Walcott, 1887, Am. Jour. Sci., 3d ser., vol. 34, p. 199, PI. I, fig. 16, opposite p. 240. (The 



description of the plate is on p. 199.) 

 Lingulella cselata (Hall), 'Walcott, 1891, Tenth Ann. Kept. U. S. Geol. Survey, p. 607, PI. LXVII, figs. 1, la-e. 



(Localities mentioned. Figs. 1, la-d are copied from Walcott, 1886b, PI. VII, figs. 1, la-d, respectively. Fig. 



le is copied from Walcott, 1887, PI. I, fig. 16.) 

 Lingulella cselata (Hall), Hall and Clarke, 1892, Eleventh Ann. Kept. State Geologist New York for 1891, PI. Ill, 



figs. 1-4. (No text reference.) 

 Lingulella cselata (Hall), Hall and Clarke, 1892, Nat. Hist. New York, Paleontology, vol. 8, pt. 1, pp. 57 and 58, 



PI. II, figs. 1^. (Mentioned in the text. Figs. 1-4 are copied from figs. 1^ of the preceding reference.) 

 Lingulella (?) coslata (Hall), Matthew, 1895, Trans. New York Acad. Sci. for 1894-95, vol. 14, p. 126. (Specimens 



from a new locality characterized and discussed.) 

 Obolus (Lingulella) bicensis Walcott, 1901, Proc. U. S. Nat. Mus., vol. 23, p. 688. (Described and discussed as a 



new species.) 



General form elongate ovate and varying from broad oval to oval acuminate. Ventral 

 valve moderately convex ■with the longitudinal line nearly flat from a short distance in front of 



