262 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



and the other ignored, though the latter was completely identified. 

 Moreover, in the case of Doctor Davidson's Monograph of the Kecent 

 Brachiopoda, his premature death before publication lef this sjmonymy 

 in such a confused condition that it is absolutely essential to verify 

 every reference by an inspection of the original work cited, if accuracy 

 is to be secured. 



All this has resulted in changes, some of which will no doubt be 

 much regretted, but which are inevital)le if the character of the 

 work here presented is to be kept up to the ordinary standard of 

 accuracy. 



In tabulating the specimens the column under "Collector" refers 

 not only to the actual collector but, when he is not known, to the 

 source from which the specimen was received. " B. F. " is an abbrevi- 

 ation for the Bureau of Fisheries, formerly the United States Fish 

 Commission. When practicable the depth is also cited, but for most 

 of these cases much more information, such as temperature of the 

 water, character of the bottom, etc., is also on record. 



It is hoped to supply figures of the new forms at a later opportunity. 

 Specimens suitable for filling gaps in the collection, or enlarging scanty 

 series, are much desired. Collectors or dealers having such material 

 available are requested to communicate with the United States 

 National Museum. 



Class BRACHIOPODA. 



Order ATREMATA. 

 Family LINGULIDAE. 



Genus LINGULA Brugui^re. 



Lingula Bruguieee, Encycl. Meth., vol. 1, pi. 250, figs, la-c, 1798.— Lamarck, 

 Prodrome, p. 89, 1799, type Patella unguis Linnaeus. 



LINGULA UNGUIS LInnaens. 



Patella unguis Linnaeus, Syst. Nat., ed. 10, p. 783, No. 671, 1758. Amboyna.— 



Gmelin, vol. 1, pt. 6, p. 3710, No. 95, 1792. 

 Mytilus lingua Solander, Portland Catalogue, p. 77, No. 1718, 1786.— Dillwyn, 



Descr. Cat. Rec. Shells, vol. 1, p. 322, 1817. 

 Des lingules Cuvier, Bull. Soc. Philom., vol, 1, p. Ill, pi. 7, figs, a, b, c, 1797. 

 Mytilus camellii Shaw, Nat. Misc., vol. 9, pi. 315, 1798 (lower figures). 

 Pharetra monoculoides Bolten, Mus., p. 159, No. 46, 1798. 

 Lingula unguis Lamarck, Prodrome, p. 89, 1799. 

 Lingula anatina Lamarck, Syst. des An. s. Vert., p. 141, 1801 .—Cuvier, Annalea 



du Museum, vol. 1, pp. 69-80, 1802; Rfegne Anim., vol. 2, p. 502, 1816.— 



Lamarck, Anim. s. Vert., vol.6, pt.l, p. 258, 1819.— Davidson, Mon. Rec. 



Brach., pt. 3, p. 206, pi. 29, figs. 1-8, 1888. 

 ? Lingula chemnitzii Kuster, Conch. Cab., ed. 2, vol. 7, p. 13, pi. 1, figs. 4-6, 1843. 

 Lingula affinis Hancock, Philos. Trans., vol. 148, pt. 2, 1858. 

 Lingula hirtula (Gray ms. in) Davidson, Mon. Rec. Brach., vol. 3, p. 206, 



