CLASS GASTROPODA 
75 
malibus iv. planatis, suturis distinctis; radiantibus circ. xx. angustis, 
acutioribus, et costulis spiralibus subaequantibus, quarum circiter v. in 
spira monstrantur, eleganter cancellatis, ad intersectiones subnodulosis; 
apertura obovali, in canalem longiorem, subarcuatam, apertam, producta; 
labro acuto, medio producto, ad costulam spiralem ex sutura tertiam ele¬ 
ganter sinuato, sinu altiore. (Carpenter.) 
Shell like a young incisa in form, the spire decorticated, four planate 
whorls remaining, suture distinct, with about twenty small longitudinal 
ribs crossed by close revolving striae, cancellating the surface, and some¬ 
times the intersections subnodulous. (Tryon, Manual of Conchology.) 
Type locality, Puget Sound. 
Range. Puget Sound to San Diego, California. 
This is Carpenter’s Drillia cancellata. 
Genus PSEUDOMELATOMA Dali, 1918 (Drillia) 
Shell fusiform, spire longer than the aperture, whorls longitudinally 
ribbed or nodulous, aperture oblong-ovate; sinus shallow, outer lip thin, 
inner lip with thin coating of enamel; canal short and nearly straight. 
Differs from Clathrodrillia in stronger sculpture and less prominent sinus. 
(Oldroyd.) 
Type. Drillia penicillata Carpenter. 
Distribution. California and Lower California. Fossil: Pleisto¬ 
cene, San Pedro to San Diego, California. 
Pseudomelatoma moesta Carpenter, 1865 
Annals and Magazine of Natural History, ser. 3, 15: 181. Tryon, Manual of Con¬ 
chology, 6: PI. 12, fig. 38. 
D. testa acuminata, laevi, dense olivaceo-fusca, epidermida laevi 
adhaerente induta; anfr. nucleosis? .... (decollatis) ; norm, viii., parum 
excurvatis, suturis parum distinctis; testa adolescente costis radiantibus 
circ. x. subobsoletis, elongatis, arcuatis, sinum versus interrupts, postice 
nodosis; anfr. ult. sculptura nulla; apertura elongata; canali brevi, aperto; 
columella recta; labio tenui; labro acuto, suturam versus sinuato, sinu 
parvo, expanso; operculo normali. Long., 1.1; long, spir., .65; lat., .36. 
( Carpenter.) 
Shell dark brown under an olivaceous epidermis, with about ten curved 
longitudinal ribs, obsoletely nodulous on the periphery, with the whorls 
usually slightly constricted above it, ribs generally obsolete on the body- 
[75] 
