324 BIOLOGICAL SURVEY OF 



proceeds with great rapidity, covering everything with a 

 heavy layer, so all that can be seen are the secondary aper- 

 tures. Ooecia small, hemispherical, and become completely 

 embedded. 



Stomachetosella Canu and Bassler, 1917 



Stomachetosella sinuosa (Busk), 1860. PI. 2, figs. 1-2. 

 (Osburn, 1912, p. 238 (Schizoporella), synonymy and refer- 

 ences; Whiteaves, 1901, p. 100 (Schizoporella), Gulf of St. 

 Lawrence; Cornish, 1907, p. 77 {Schizoporella), Canso, Nova 

 Scotia.) Common on stones, taken at three shore stations 

 and eighteen dredging stations. A common northern species, 

 from the Arctic Ocean to Cape Cod and to the British Islands. 

 Also on the Pacific coast south to Puget Sound. 



Canu and Bassler, who erected the family, indicated that 

 this species belongs in it, but did not state the generic rela- 

 tions. O'Donoghue (1926, p. 62) has located it in the present 

 genus. This species in younger stages has much the appear- 

 ance of a Schizoporella, but the heavy secondary calcification 

 makes its appearance almost at once all around the aperture, 

 as well as over the front of the zooecium. The rounded ovicell 

 usually bears a large median pore, and though the ovicell 

 may be covered during secondary calcification, the pore re- 

 mains evident. There are no avicularia. The zoarium usually 

 forms regularly rounded purplish to reddish-browai patches 

 one stones and shells, one layer of zooecia in thickness, and 

 so heavily calcified at an early stage that it is difficult to make 

 out any of the primary characters except at the last row on 

 the margin. 



Stomachetosella peoducta (Packard), 1863. PI. 15, figs. 

 1-3. (Packard, 1863, p. 407, pi. I, fig. 1 (Lepralia producta, 

 n.sp.); Hincks, 1889, p. 430, pi. 21, fig. 2 (Smiftia) ; Whit- 

 eaves, 1901, p. 106 (Smittia) ; Nordgaard, 1906, p. 19, pi. 2, 

 figs. 19-21 (Schizoporella.)) Apparently very rare; observed 

 only once, encrusting a pebble. The species was described 

 from Caribou Island, off southern Labrador, in the Grulf of 

 St. Lawrence. Dawson later sent material to Hincks, who 



