Long. 0·36, long. spir. 0·26, lat. 0·12, div. 20°.
Hab. Monterey, Cooper. From shell washings.
The solitary specimen has the general aspect of O. granulosa on a very small scale.
Opalia retiporosa, Cpr. n. s. State Collection, No. 1014.
O. t. “O. bullatæ” formâ simulante, sed sculpturâ omnino diversâ; anfr. nucl. ?... (decollatis); norm. vii. subrotundatis, suturis impressis; costis radiantibus rotundatis, subarcuatis, haud varicosis, circ. xiv., super suturas tenue continuis; anfr. ult. seriebus nodulorum spiralibus irregularibus, vice costarum, instructâ, peripheriâ tuberculosâ; totâ superficie retiporosâ, interstitiis alte interpunctatis, punctulis minutissimis, confertissimis; basi vix costatâ, à serie nodulorum angulatâ; aperturâ rotundatâ; peritremati continuo, varicoso; labro haud sinuato; operculo? paucispirali.
Long. 0·28, long. spir. 0·20; lat. 0·10; div. 20°.
Hab. Catalina Island; 3 dead in 40 fm.; Cooper.
The texture has a rotten appearance; yet one of the specimens was stained with purple, and contained the dried remains of the animal, with its operculum. In the endeavor to extract this, the shell gave way.