OF CONCHOLOGY. 



97 



decussated by concentric striae ; apex straight, involute, immersed; 

 •wholly of either reddish, violet, purple or yellowish color. 



Remarks. — Five species of the above genus are now described. 

 The above appears to approach nearest to elegantissima, Desh., 

 which is smaller in size, apex oblique and not contracted in the 

 middle. 



CITHAROPSIS, nov. gen., Pease. 



Description. — T. parva, fusiformi, longitudinaliter costata, 

 nitida, interdum iridescente ; labro superne emarginato, intus 

 lirato aut denticulato ; apertura angusta. 



Remarks. — I establish the above genus to include a group of 

 small, bright shining species, resembling anachis in the character 

 of their aperture and in being longitudinally ribbed or partially 

 so, and Cithara in general shape and emargination of outer lip. 

 Mr. Cuming has placed one species with the Tritons (T. pusillus, 

 Pse.) Mr. Gaskoin attached the name of Columbella lachryma 

 to another ; Dr. Carpenter connects them with Anachis, and I 

 have described several as Cithara. They evidently belong to 

 the Columbellinse. 



Citharopsis ornata, Pease. — PI. 11, fig. 19. 



Description. — T. fusiformi, spira gracilis, elongata ; costis, ro- 

 tundatis, contiguis, interdum ad anfr. ultimum obsoletis ; apertura 

 angusta ; columella postice arcuata, antice recta, vix laminato 

 callosa ; labro denticulato ; costis albidis ; interdum albo fasciata, 

 irregulariter rufescente fusco maculata aut punctata, anfr. ultimo 

 lineis flexuosis, rufo-castaneis ornata. 



Dimensions. — Long. 3, diam. 1^. 



Hah.— Tahiti. 



Shell rather stoutly fusiform ; spire slender, elongate ; ribs 

 rounded, prominent, contiguous, sometimes becoming obsolete on 

 lower part of last whorl ; aperture narrow ; columella arched 

 above, straight below, slightly laminately callous ; outer lip den- 

 ticulate ; ribs white, sometimes banded with white, blotched or 

 spotted irregularly with iridescent reddish brown, last whorl or- 

 namented with flexuous lines of reddish chestnut. 



Remarks. — This beautiful little shell varies much in the dis- 

 position of its colors. The opaque white ribs and flexuous lines 

 on last whorl are, however, constant. 



Citharopsis gracilis, Pease. — Plate 11, fig. 20. 



Description. — T. gracilis, elongato-fusiformi, nitida ; costis 



