278 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.42. 



Two specimens — one of which is in the Geological Survey Museum, 

 Ottawa, and the other in the United States National Museum, Cat. 

 No. 211542 — were dredged in 18 to 20 fathoms in Ship Channel, 

 Barkley Sound, Vancouver Island, British Columbia. One of these 

 specimens has 7 post-nuclear whorls and measures: Length, 6.5 

 mm.; diameter, 2.4 mm. 



Named for Mr. C. H. Young, of the Geological Survey, Ottawa, at 

 the request of Mr. John C. Macoun. 



This species follows Odostomia (Evdlea) Mllisnooensis in the key. 



ODOSTOMIA (EVALEA) THEA, new species. 



Plate 37, fig. 7; plate 38, fig. 13. 



Shell moderately large, elongate-ovate, yellowish-white. Nuclear 

 whorls small, deeply, obliquely immersed in the first of the succeedmg 

 turns, above which only the tUted edge of the last volution projects. 

 Post-nuclear whorls moderately rounded, rather high between the 

 sutures, slightly shouldered at the summit, crossed by numerous fine, 

 decidedly retractive lines of growth. The spiral sculpture is strong 

 on the early whorls, becoming gradually finer with the growth of the 

 shell. The first two turns are divided into five, almost equal areas 

 by four equally, strongly incised, spiral Imes, between the sutures. 

 On the third whorl the spiral lines are mcreased to about a dozen 

 and are considerably less strong; on the succeedmg turn they are 

 probably almost tripled and still weaker; while on the penultimate 

 volution the sculpture consists of somewhat wavy, closely spaced, 

 spiral striations. Periphery of the last whorl obscurely angulated, 

 somewhat inflated; base moderately long, curving gently to the ante- 

 rior portion of the shell, marked like the body whorl with fine, spiral 

 lines. Sutures somewhat constricted. Aperture moderately large, 

 oval; posterior angle obtuse; outer lip thin; inner lip rather long, 

 slightly curved, and somewhat revolute, provided with a strong fold 

 at its insertion; parietal wall glazed with a thin caUus. 



The type (Cat. No. 211556, U.S.N.M.) comes from San Pedro, Cali- 

 fornia. It has 6 post-nuclear whorls and measures: Length, 4.7 

 mm.; diameter, 2.2 mm. 



This species follows Odostomia (Evalea) youngi in the key. 



ODOSTOMIA (EVALEA) CALLIOPE, new species. 

 Plate 36, figs. 10, 10a. 



Shell elongate-ovate, turreted, narrowly umbUicated, creamy- 

 white. Nuclear whorls small, obliquely immersed in the first of the 

 succeeding turns, above which only the tilted edge of the last volution 

 projects. Post-nuclear whorls rather high between the sutures, 

 decidedly, tabulatedly shouldered at the summit, almost flattened 

 below the shoulder, the spaces between the shoulders and the sutures 



