CLASS GASTROPODA 
139 
Mangilia perattenuata Dali, 1905 
Nautilus, 18: 123. Proceedings of the United States National Museum, 56; PI. 20, 
fig. 11, 1919. 
Shell small, very slender, with one smooth turgid nuclear, and six 
smooth normal whorls; the whorls are but slightly convex, whitish, the 
suture very distinct, its posterior margin slightly overhanging or dom¬ 
inant; aperture narrow, short, simple, the outer lip slightly concavely 
waved between the periphery and the suture, canal short, a little recurved, 
relatively rather wide. Long, of shell, 9.5; of last whorl, 3.75; maximum 
diameter, 2.5 mm. (Dali.) 
Type in United States National Museum. Type locality, Monterey 
Bay, California, in 10-40 fathoms. 
Range. Known only from type locality. 
Mangilia philodice Dali, 1919 
Proceedings of the United States National Museum, 56:66; PI. 22, fig. 7. 
Shell small, white, with four or more whorls exclusive of the (lost) 
nucleus; suture distinct, not appressed; whorls sloping behind, rounded 
in front; axial sculpture on (on the penultimate whorl, about 17) short 
rounded ribs with subequal interspaces, hardly extended over the periph¬ 
ery and gradually becoming obsolete on the last whorl; incremental 
lines somewhat conspicuous on the base where they slightly reticulate 
the spiral sculpture; the latter comprises three prominent cords on the 
periphery equal and equidistant, swollen where they override the ribs, 
and feebler on the last whorl; the anal fasciole carries finer equal spiral 
threads, the base 10 or more somewhat larger and more nearly adjacent as 
they approach the canal; aperture rather narrow, outer lip, solid, sharp- 
edged, anal sulcus large, rounded, close to the suture, inner lip erased, 
canal short, deep, slightly recurved. Height of last and three proceeding 
whorls, 7.5; of last whorl, 5; diam., 3 mm. (Dali.) 
Type in United States National Museum, No. 208916. Type locality, 
Station 4454, off Point Pinos Light, Monterey, California. 
Range. Point Ano Nuevo, California, to Coronado Islands. 
Mangilia pulchrior Dali, 1919 
New name for M. tiitens Carpenter, 1865, preoccupied. 
M. testa “M. variegata” simili, sed nitentiore, fascia alba et altera 
rufa-fusca attingente spiram ascendentibus. Long., .25; long, spir., .15; 
lat., .08; poll. (Carpenter.) 
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