364 
PACIFIC SCIENCE, Vol. XVIII, October 1964 
Fig. 4. Verruca scrippsae Zullo, sp. nov., holotype UCMP 34713. Figs. A, B, Shell, X 10. Fig. B, Scutotergal 
view. Fig. A, Carinorostral view. Figs. E, F, Movable scutum, X 21. Figs. C, D. Movable tergum, X 21. Figs. 
G—K, Trophi, X 40. Fig. G, Labrum. Fig. H, Palpus. Fig /, Mandible. Fig. /, Inner maxilla. Fig. K, Outer 
maxilla. 
inflected, regularly and coarsely denticulate; 
basal denticulae impressed into shell of gastro- 
pod to which attached, leaving circular scar 
upon removal. 
Movable scutum (Figs. AE, F) with two artic- 
ular ridges separated by narrow, shallow furrow; 
first ridge forming large tooth on otherwise 
unadorned tergal margin; second or crescentic 
ridge extending to basitergal angle; remainder 
of exterior of valve without ridges, ornamented 
only by deep, regularly spaced grooves separat- 
ing growth increments; interior of movable 
scutum with large, distinct, kidney-shaped ad- 
ductor pit in apical part of valve; upper and 
