xSfo. 2314. 



LIST OF RECENT BRACHIOPODA—DALL. 



283 



Subgenus Thecidellina J. Allan Thomson, 



Theddellina J, Allan Thomson, Geol. Mag., n. s., dec. 6, vol. 2, No. 616, 

 p. 462, 1915. T. iarretti Davidson. 



This differs chiefly from Lacazella by its more simple arrangement 

 of the brachia and their supports. 



THECIDELLINA BARRETTI Davidson. 



Theddium barretti Davidson, Geol. Mag., 1864, vol. 1, p. 17, pi. 2, figs. 1, 2, 3.— 

 Crosse, Journ. de Conchyl., vol. 14, 1866, p. 272. 



Type locality. — Jamaica, West Indies. 



THECIDELLINA MAXILLA Hedley. 



Theddea maxilla Hedley, Mem. Austr. Museum, vol. 3, pt. 8, p. 508, fig. 37, 

 July, 1899. 



Tyye locality.— Funoluii atoll, Ellice Islands, in 40 to 80 fathoms 

 on corals. Charles Hedley. 



THECIDELLINA BLOCHMANNI, new species. 



Shell ovate, white, solid, rudely concentrically sculptured exter- 

 nally, the lower valve attached by the apex, the area of the beak flat, 

 with no indication of a pseudodeltidium; the interior finely granulose; 

 the apex being broken off, the characters of the cavity of the beak are 

 unknown, but in what is left there is no indication of a septum; the 

 upper valve is rounded, its inner margin conspicuously granulose; 

 the septum is strong, straight, grooved above, its posterior end 

 tubular, opposite two small holes in the "bridge" lamella; anteriorly 

 the edges of the septum round evenly into the sharp ridge which 

 surrounds the brachial furrows in a nearly circular uninterrupted 

 keel with serrate edge; the kidney-shaped area on each side of the 

 septum is separated from it by a shallow groove ; the area thus enclosed 

 has in each case a deep pit posteriorly, and anteriorly is filled with 

 irregularly disposed prominent unequal rounded pustules; the cardi- 



