CLASS GASTROPODA 
93 
Type in United States National Museum, No. 96841. Type locality, 
off Santa Barbara Island, California, in 302-614 fathoms. 
Range. Off Santa Barbara Islands in 414 fathoms. 
Borsonella rhodope Dali, 1919 
Proceedings of the United States National Museum, 56: 39; PI. 12, fig. 3. 
Shell with seven or more whorls exclusive of the (lost) nucleus, white 
covered with a pale olivaceous periostracum, suture distinct, not appressed; 
axial sculpture of rather strong irregular incremental lines; spiral sculp¬ 
ture of a thickened band between the suture and the somewhat constricted 
anal fasciole; at the shoulder a blunt angulation, in front of which are two 
obscure threads followed by a more distinct thread on which the suture is 
laid; on the last whorl in front of the angulation are about 18 threads 
growing smaller and more close-set anteriorly; there is no siphonal fasciole; 
aperture rather narrow, anal sulcus shallow rounded, outer lip thin, arcu¬ 
ate, sharp; inner lip erased, pillar straight, obliquely attenuated in front; 
canal rather wide, not recurved. Height of shell, 19; of last whorl, 11; 
diameter, 7 mm. (Dali.) 
Type in United States National Museum, No. 212361. Type locality, 
Station 2953, off Santa Rosa Island, in 82 fathoms. 
Range. Off Santa Rosa Island, in 82 fathoms, to San Diego, in 
633 fathoms. 
Borsonella bartschi Arnold, 1903 
Paleontology of San Pedro, California, 200; PI. 5, fig. 7; PI. 9, fig. 1. 
Shell small, fusiform, elongate; apex obtuse; mammilliform; whorls 
seven, angulated near middle; body-whorl less angulated than those of 
spire; anterior portion of whorl ornamented with about 12 oblique, trans¬ 
versely elongated nodes, which reach their greatest prominence on the 
angle of the whorl; body-whorl sometimes smooth and sometimes nodose; 
posterior portion of the whorl flat and smooth except for incremental lines; 
incremental lines fine, oblique, and angulated convexly posteriorly on 
upper portion of the whorl; suture deeply appressed, distinct; aperture 
elongate-elliptical; outer lip thin, arcuate anteriorly below posterior sinus; 
inner lip incrusted; columella nearly straight, incrusted, with one sharp 
plication in middle of aperture; posterior sinus shallow; anterior sinus 
prominent. Long., 19; lat., 7; body-whorl, 11.5; aperture and canal, 
8.5 mm. (Arnold.) 
Type is in United States National Museum. Type locality, Lower San 
Pedro, series Deadman Island. 
[93] 
