310 
PACIFIC SCIENCE, Vol. VI, October, 1952 
Geol. Survey, Prof. Paper 207: 73, pi. 34, 
fig. 12, 1946. 
Nassarms cooperi (Forbes), Smith and Gordon, 
Calif. Acad. Sci., Proc. IV, 26(8): 187, 1948. 
TYPE specimen: British Museum.^ (Old- 
royd, 1927). 
TYPE locality: Said to be "Sandwich Is- 
lands," probably a ballast shell (Oldroyd, 
1927). 
DESCRIPTION: The preceding description 
of Nassarius mendicus may be applied to cooperi 
except that the transverse sculpture is more 
pronounced on the latter form; the longitu- 
dinal ridges become actual nodes in the mid- 
dle of the whorls on cooperi. 
Several authors place N. cooperi in synonymy 
with N. mendicus. However, I am inclined to 
call cooperi a subspecies. It is true that these 
two forms occur together at many points 
along the Pacific coast. However, most au- 
thors give Alaska as the northernmost range 
of mendicus and Puget Sound as the northern- 
most range of cooperi. Thus, cooperi seems to 
be a more southern form. It is also true that 
several workers record collections of speci- 
mens showing perfect intergradation between 
the two forms. However, I believe that the 
difference between the typical mendicus, hav- 
ing relatively smooth whorls completely lack- 
ing nodes, and the prominently tubercled 
cooperi is sufficient to separate cooperi as a 
subspecies of mendicus. 
RECENT GEOGRAPHIC RANGE: Puget Sound, 
Washington, to San Diego, California. 
HABITAT: 3 to 24 fathoms, in sand. 
Nassarius pagodus (Reeve) 
PI. I, Fig. 7 
Triton pagodus Reeve, Conch. Icon. 2: 97, pi. 
20, fig. 97, 1843. 
Buccinum decussatum Kiener, Spec. Gen. et 
Icon, des Coq. Viv. (2): 109, pi. 30, fig. 
3, 1834. 
Nassa pagoda Reeve, Tryon, Man. Conch. I, 
4: 45, pi. 14, figs. 226-228, 1882; Pilsbry 
and Lowe, Acad. Nat. Sci. Phila., Proc. 
84: 115, 1932. 
Alectrion pagoda Reeve, Dali, U. S. Natl. Mus., 
Proc. 51: 576, 1917. 
Nassarius pagodus Reeve, Strong, Hanna, and 
Hertlein, Calif. Acad. Sci., Proc. IV, 21(10): 
119, 1933. 
TYPE SPECIMEN: In Cuming collection. Mu- 
seum Norris.^ (Reeve, 1844). 
TYPE LOCALITY: Bay of Montija, West 
Columbia (Reeve, 1844). 
DESCRIPTION: Maximum length, 27 mm.; 
average length, about 23 mm.; usually 8 
whorls; prominent transverse ridges forming 
angular nodes in middle of whorls; fine spiral 
threads; inner lip with definitely margined 
callus, not spreading over body whorl; prom- 
inent tooth on upper part of columella; outer 
lip swollen; somewhat long, recurved anterior 
canal; wide, deep groove at base of body 
whorl; aperture almost half length of shell, 
denticulate within; shell color varies, often 
white or yellowish or variously banded with 
brown. 
RECENT GEOGRAPHIC RANGE: Cape San Lu- 
cas, Lower California, to Panama. 
HABITAT: 3 to 40 fathoms; also on mud 
flats. 
Nassarius versicolor (C. B. Adams) 
PI. I, Fig. 5 
Nassa versicolor C. B. Adams, N. Y. Lyceum 
Nat. Hist., Ann. 5: 66 [pagination of sepa- 
rate], 1852; Cooper, J. G., Calif. Acad. Sci., 
Proc. II, 5: 45, 1895. 
Nassa versicolor var. striatula C. B. Adams, N. 
Y. Lyceum Nat. Hist., Ann. 5: 66, 1852. 
Nassa (Hima) versicolor C. B. Adams, Tryon, 
Man. Conch. I, 4: 50, pi. 15, fig. 270, 1882. 
Alectrion versicolor C. B. Adams, Dali, U. S. 
Natl. Mus., Proc. 51: 576, 1917. 
Nassarius versicolor (C. B. Adams), Grant and 
Gale, San Diego Soc. Nat. Hist., Mem, 1: 
677, 1931. 
Nassarius versicolor (A. Adams), Jordan, Stan- 
