15 



Length one and one fourth of an inch ; breadth three fourths of 

 an inch. 



Inhabits Santa Barbara. Col. Jewett. 



Approaches in form C. orion and classiarius, both of which are 

 more elongated ; its proportions are, perhaps, more like C. fulgu- 

 rans. Its coloration is like some varieties of Cedo nulll, and C. 

 archon, or like the darker varieties of C. portoricanus. It is proba- 

 bly the species named by Menke, in his Catalogue of Mazatlan 

 Shells as C. acliatinus. 



CONUS PUSILLUS (PI. XIV. Fig. 22.) 



T. parva, conica, polita, seriebus ad octo granulorum remotornm antice 

 cincta ; spira planulata, anfr. 8 coronatis constructa ; alba, maculis obliquis 

 elongatis irregularibus aurantiacis bicincta ; apice rufo ; apertura angusta. line- 

 aris. 



Shell quite small, conic, very slightly swollen posteriorly, sur- 

 face smooth, the anterior half having about eight circles of beads so 

 spaced as to form squares ; spire nearly level, composed of eight 

 coronate whorls divided by a spiral groove ; color white, with a 

 broad band of irregular, oblique elongated orange spots posteriorly, 

 a fainter one near the tip, and spots between the tubercles orange ; 

 tip dark orange ; aperture very narrow. 



Length half an inch ; breadth three tenths of an inch. 



Inhabits Mazatlan. Col. Jewett. 



Allied to C. sponsalis, especially in coloring, but is smaller, with- 

 out convex outline, more elongated, spire much less elevated. 

 Nearly the same remarks apply to C. nanus, in which there is less 

 resemblance as to color. Its proportions are more like C. speciosis- 

 simus. 



PHOLAS OVOIDEA (PL XV. Fig. 1.) 



T. ovoidea, crassa, cinerea, postice valde hians et epidermide valde prolon- 

 gata. antice lamina calcarea clausa ; valvis ad extreraitates rotundatis, sulco 

 lato mediano partitis ; portione postica inornata ; portione antica laminis con- 

 centricis undulatis confertis et plicis radiantibus cancellata ; apicibus ad qua- 

 drantem anteriorem sitis ; apophysis cardinalis subulata, ad apicem excavata : 

 laminae apicales baud appressec, duplicate ; valvula; cardinales ? 



Shell ovoid, rather solid, chalky white, very widely gaping be- 

 hind the beaks which are placed at the anterior fourth of the shell, 



