256 Mr. R. B. Hinds's Descriptions of new Shells. 



pureis indistinctis cincto ; apertura alba ; labio externo crenato 

 et dentato, interno transversim striate Axis 52 lin. 

 Geog. San Diego, California. 



There is some chance that this shell may be confounded 

 with R. ventricosa, as the more prominent features of both 

 have only a comparative value. This, however, is a much 

 larger shell, is without any disposition to tuberculatum near 

 the suture, the varices are much bolder and cavernous, the 

 tubercles on the spire fewer and larger, and the pillar lip is 

 set with many small transverse ridges. 



1. Conns marchionatus . Testa oblonga, turbinata, alba, fusco angu- 

 late reticulata ; spira depressa, ecoronata, mucronata, spiraliter 

 striata ; anfractibus sulcatis ; apertura inferne paululum effusa, 

 ad basin striata; epidermide diaphano lsevi induta. Axis 16 lin. 

 Geog. Port Anna Maria, Nuhuhiva, Marquesas ; dredged from a 



sandy floor in 7 to 10 fathoms. 



A difference of opinion seems to exist as to what is the 

 base colour of this and similar species. My own opinions 

 were open to proof, till a specimen with a repaired fracture 

 appears to me to decide it. After repairing the injury, the 

 animal for a time has discontinued the reticulation, and a 

 portion of a pure white has been produced. After awhile 

 the meshes are again continued. A variety of this shell oc- 

 curs in which the reticulation is of a pale yellow colour. 



2. C. patricius. Testa pyriformi, tumida ; spira acuminata, minute 

 tuberculata vel coronata ; anfractu ultimo striato, superne plicifero, 

 inferne valde contractato ; apertura lineari ; labio externo tenui, 

 acuto ; epidermide fulvo lsevi induta. Axis 13 lin. 



Geog. Gulf of Nicoya, Central America ; dredged from sandy mud 

 in 7 fathoms. 



Shell much contracted in the lower portion of the last 

 whorl, somewhat tumid below the shoulder ; spire moderately 

 produced, minutely coronated, at the angle of the last whorl 

 thrown into small folds ; aperture narrow and linear ; the 

 outer lip very thin. Epidermis of a clear fulvous colour, 

 beneath which the shell is of a uniform fawn-colour. 



3. C. Calebs. Testa pyriformi, alba; spira retusa, conica, ecoronata ; 

 anfractu ultimo lineis elevatis equidistantibus transversim dispo- 

 sitis ; apertura lineari, inferne paululum effusa, alba ; columella? basi 

 et spirse apice violaceo ; epidermide olivacea, fragili. Axis 12 lin. 

 Geog. Ambow, Feejee Islands. A single specimen was captured 



on the coral reefs. 



Cyrtulus*, n. g. 

 Testa fusiformis ; anfractus ultimus et penultimus turbinatus ; spira 

 per saltum ascendens ; apertura linearis in canali brevi effuso de- 



* xvgrog incurvus, otvKo$ columna. 



