68 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
except incremental lines, unless on the (eroded) apical whorls; siphonal 
fasciole wide, extending from the suture to an obscure ridge which forms 
the shoulder of the whorl just behind the periphery; on the fasciole are 
six or seven smooth, rounded, subequal, spiral threads with equal or 
wider interspaces, more crowded anteriorly; beyond the shoulder are nine 
similar but coarser threads, sometimes entire, sometimes flattened or even 
medially sulcate on top, extending over the base, and on the region of the 
canal as many more, smaller and more distant, crossed by obvious incre¬ 
mental lines; aperture elongate, rather narrow, anal sulcus very wide but 
shallow; outer lip produced, evenly arcuate to the canal, not constricted 
at the base of the whorl; pillar lip smooth, pillar short, obliquely truncate, 
gyrate, the axis pervious; canal wide, hardly differentiated. Long, of shell, 
48; of last whorl, 35; of aperture, 26; maximum diameter, 16.5 mm. 
(Dali.) 
Type in United States National Museum, No. 122563. Type locality, 
U.S.S. “Albatross” Station 2859, Pacific Ocean, in 1,569 fathoms. 
Range. Known only from type locality. 
Genus CYMATOSYRINX Dali, 1889 (Drillia) 
We now come to a group of Drillias which have a family resemblance 
to Pleurotoma lunata Lea, of the Miocene of Virginia, and are doubtless 
derived from the same stock. That species of which the type is before 
me as I write, is larger, stouter, and finer in development than any of its 
recent relatives, but there is a singularly uniform facies to them all. 
D. pallida Sowerby, from the west coast of America at Panama, is appar¬ 
ently to be included in the same group. For these, should a sectional name 
be required, since they are distinctly not typical species of Crassispira , the 
name Cymatosyrinx might be applied. (Dali.) 
Type. Pleurotoma lunata Lea. 
Distribution. Pacific coast of America. Fossil: Miocene of the 
Atlantic. 
Subgenus Elaeocyma Dali, 1917 
Cymatosyrinx empyrosia Dali, 1899 
See Part III, Plate 4, fig. 5 
Nautilus, 12:127. Proceedings of the United States National Museum, 56: PI. 4, fig. 1. 
Shell solid, with a high acute spire and polished surface; color yellow¬ 
ish with a burnt sienna brown tint on the later whorls, a paler peripheral 
band develops white patches where it crosses the ribs; transverse sculpture 
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