Long. 0·06, long. spir. 0·03, lat. 0·025, div. 12°.
Hab. S. Pedro. Cooper.
One specimen and a few fragments were found in the shell-washings of Dr. Palmer’s consignment. Differs from Chr. ovulum, in its slender shape and delicate spiral sculpture.
Chrysallida cincta, Cpr. n. s.
Chr. t. satis regulari, albâ, marginibus spiræ vix excurvatis; vert. nucl. parvo, celato, dimidium truncationis vix superante; anfr. norm. iv. parum excurvatis, suturis distinctis; costis spiralibus obtusis circ. x, cinctâ, quarum iv. in spirâ monstrantur; costis iii. posticis radiatim subgranulosis, seriebus circ. xv., marginibus spiræ utrinque parallelis, supra quartam subobsoletis; interstitiis latis, delicatim decussatis; basi satis prolongatâ; columellâ antice valde effusâ; plicâ parvâ, medianâ.
Long. 0·11, long. spir. 0·07, lat. 0·05, div. 35°.
Hab. Santa Barbara group of islands. Cooper.
The solitary specimen is probably immature. Intermediate between Chrysallida proper and Mumiola.