Trochidae 109 



to twelve of these lirae, those upon the base separated by finely 

 striated interspaces; aperture simple, quadrate, nacreous within; 

 columella oblique, thickened at base; operculum corneous, thin, 

 circular, multispiral, with central nucleus. 

 Dredged from four to six fathoms. 



Calliostoma pulchrumis' (C. B. Adams) (C. veliei Pilsbry) PI. 21, fig. 139 



Alt., 11; width of base, 9 mm. Shell conical, imperforate, whorls 

 not rounded, angulate; shoulder below middle of whorl; ground 

 color yellowish, with more or less regularly spaced longitudinal 

 flammules of pinkish purple; base unicolored; apex sharp; about five 

 whorls with spiral sculpture of beaded lirae, the most prominent 

 lirations at shoulder of whorls; numerous lirae, alternately larger 

 and smaller over base; sutures clearly defmed; aperture simple, 

 quadrate, nacreous within; outer lip bluntly angled in accord with 

 shape of whorls; columella short, oblique, thickened at base; base 

 of shell not quite flat, umbilicus wanting; operculum typical. 



Dredged from three to six fathoms. 



ralliostoma jujubinum perspecthumiss (Koch) (Philippi) 



PI. 21, figs. 140a, b 



Alt., 15.5; width of base, 15 mm. Shell more smoothly conical 

 and whorls less defined than in C. euglyptum, and C. pulchrum; 

 color brown or reddish brown with quite regularly distributed buflF- 

 colored flammules; apex sharp, dark-colored; four to six whorls, 

 sculptured with closely placed spiral lirae, strongest at shoulders 

 of whorls and alternately larger and smaller over body whorl; 

 sutures not well defined; aperture simple, quadrate, angled at outer 

 base, nacreous withm; columella concavel}^ curved; base deeply 

 perforate, a coarsely beaded spiral lira outlmes the umbilicus; op- 

 erculum typical. 



Not uncommon on beaches, dredged in three to six fathoms. 



Eggs in long gelatinous ribbon, several inches long, 3 to 4 mm. broad, 

 attached at intei-vals to glass of aquarium and part of it floating. Inside 

 of ribbon are numerous yellowish eggs, irregularly arranged, 25 to 28 

 mm. covered by thin membrane and floating in a nutrient layer in the 

 egg covering, the latter surrounded by a thick layer of jelly, originally 

 spherical, becomes more or less polyhedral by pressure of its neighbors. 

 — Marie Labour. 



is'^ Lat., pulchrum, glorious, fine. 



^** Lat., perspectivus, tff look through. 



