SIPHONOTRETID^. 627 



Siphonotreta unguindata (Eichwald), Quenstedt, 1885, Handbuch der Petrefactenkunde, Auflage 3, p. 755, PL LVIII, 



fig. 53. (Discussed in German.) 

 Siphonotreta unguiculata (Eichwald), Gagel, 1890, Beitr. zur Naturkunde Preussens, von Physikal.-oekonom. Gesell. 



Konigsberg, 6, p. 23, PL I, fig. 3. (Characterized in German.) 

 Siphonotreta unguiculata (Eichwald), Hall and Clarke, 1892, Eleventh Ann. Kept. State Geologist New York for 



1891, p. 253, PL IV, figs. 22-26. (Mentioned. Figs. 22 and 23 are copied from Davidson, 1877, PL II, figs. 9 



and 11, respectively. Figs. 24-26 are copied from Kutorga, 1848, PL VI, figs. 2c, 3b, and 3a, respectively.) 

 Siphonotreta unguiculata (Eichwald), Hall and Clarke, 1892, Nat. Hist. New York, Paleontology, vol. 8, pt. 1, p. Ill, 



PI. IV, figs. 22-26. (Mentioned. Figs. 22-26 are copied from those in the preceding reference, which see.) 



The characters of this species are included in the generic description given by Messrs. 

 Hall and Clarke [1892c, p. 110]. It differs from S. verrucosa (Eichwald) in its broader outline 

 and more finely granulated and spinose surface. Figs. 6, 6a, and 6b are of a specimen received 

 from Dr. Fr. Schmidt; fig. 6c is copied from Davidson [1877, PI. II, fig. 9]. 



Formation and locality." — Ordovician: (336g) Limestone in the vicinity of Zarskoe Selo; (336w) near Paw- 

 lowsk; and (336x) in the Archangel quarry on the Volkhof (Wolchow); all near St. Petersburg, Russia. 



(336v) Echinosphxrites limestone at Reval; (337d) " Brandschief er " at Salla, near Erras, 85 niiles (137 km.) east 

 of Reval; and (337e) "Jewesche Schicht" at Altenhof, near Poddrus, 55 miles (88.6 km.) east of Reval; all in the 

 Government of Esthonia, Russia. 



Drift bowlders of Echinosphxrites limestone at the following localities: (386i) Near Wehlau, 30 miles (48.3 km.) 

 east of Konigsberg, East Prussia; (386j) at Belschwitz, East Prussia; (386k) near- Wormditt, East Prussia; and (3861) 

 near Marienwerder, West Prussia; all in Germany. 



Passage beds between the Upper Cambrian and the Ordovician: (336e) Orthoceratite limestone at Pulkowa; (337m) 

 Orthoceratite limestone at Popowka; (337k) Orthoceratite limestone on the banks of Wolchow (Volkhof) River, near 

 Lake Ladoga; and (336y) glauconitic limestone at Popowka; all near St. Petersburg, Russia. 



Orthoceratite limestone ("Vaginatenkalk") at the following localities: (336z) At Narwa; (337) at Erras, 85 miles 

 (137 km.) east of Reval; (337a) at Kusal, 25 miles (40 km.) east of Reval; (337b) b at Reval; (337c) on Odensholm Island, 

 55 miles (88.6 km.) west of Reval; and (3371) at Baltischport, west of Reval; all in the Government of Esthonia, 

 Russia. 



Siphonotreta verrucosa (Eichwald). 



Plate LXXXI, figures 5, 5a-b. 



Terebratula verrucosa Eichwald, 1840, Jour. Natur- und Heilkunde Medizinischen Akad. St. Petersburg, pts. 1 and 2, 



pp. 140-141 (pp. 26-27 in second part of one edition). (Described in German.) 

 Siphonotreta verrucosa (Eichwald), de Verneuil, 1845, Geologic de la Russie d'Europe, byMurchison, de Vemeuil, and 



de Keyserling, vol. 2, pt. 3, p. 287, PL I, figs. 14a-d. (Described in French.) 

 Siphonotreta verrucosa (Eichwald), Kutorga, 1848, Verhandl. Russ.-kais. min. Gesell. St. Petersburg for 1847, No. 12, 



pp. 266-267, PL VII, fig. 1. (Described in German.) 

 Siphonotreta verrucosa (Eichwald), Morris, 1849, Annals and Mag. Nat. Hist., 2d ser., vol. 4, PL VII, figs. 2a-d. (No 



text reference. Description of plate on p.. 321.) 

 Siphonotreta verrucosa (Eichwald), Davidson, 1853, British Fossil Brachiopoda, vol. 1, Introduction, No. 3, PL IX, 



figs. 267 and 268. (Mentioned on p. 133.) 

 Siphonotreta verrucosa Eichwald, 1860, Lethsea rossica, ancienne pSriode, vol. 1, sec. 2, pp. 916-917. (Described 



and discussed in French.) 

 Siphonotreta verrucosa (Eichwald), Schmidt, 1861, Archiv. fur Naturkunde Liv-, Ehst-, und Kurlands, 1st ser., Bd. 2, 



p. 218. (Localities mentioned.) 

 Siphonotreta verrucosa (Eichwald), Quenstedt, 1871, Petrefactenkunde Deutschlands, Abth. 1, Bd. 2, p. 674, PL 



LXI, figs. 28-30. (Discussed.) 

 Siphonotreta verrucosa (Eichwald), Quenstedt, 1885, Handbuch der Petrefactenkunde, Auflage 3, p. 755, PL LVIII, 



figs. 52 and 54. (Discussed in German.) 

 Siphonotreta verrucosa (Eichwald), Gagel, 1890, Beitr. zur Naturkunde Preussens, von Physikal-oekonom. Gesell. 



Konigsberg, 6, p. 22, PL I, figs. 2a-b. (Characterized in German.) 



This beautiful and instructive species is described by de Verneuil [1845, p. 287]. Figures 

 5, 5a, and 5b are drawn from a specimen received from Dr. Fr. Schmidt. The outer opening of 

 the pedicle tube is a little longer than wide, and slightly pointed toward the minute beak, which 

 is at its posterior margin. There is no trace of a groove or pseudodeltidium on the false area 

 of this species or Siphonotreta unguiculata. 



a Localities 336y and 337ni are represented in the United States National Museum collections; the other localities are taken from the 

 references in the synonymy. The authority for each reference cited will be found in the list of localities, pp. 161-291. 

 iiMay be the type locality. Eichwald [1829, p. 274] gives it as "limestone at Reval." 



