12 SYSTEMATIC ARRANGEMENT 



1. C. inflatus, t. 84. 



2. C. erinaceus, t. 89. f. 6 ; Forbes fy Hartley, B. M. t. T.T. f. 1 . 



3. C. palma-rosae, t. 7. f. 6. 



4. C. zealandicus, t. 7. f. 3. 



5. C. octonus, t. 7. f. 4. 



G. C. Trunculus, t. 6. f. 1 <?, t. 89. f. 7. 

 7. C. ricinuloides, t. 7. f. 5. 



Sometimes, instead of the processes of the varices being branched, 

 they are short, conical and simple ; at others the tubercles between 

 the varices are produced into varices, when the shell has six instead 

 of three varices on each whorl, which proves that these tubercles 

 may be considered as abortive varices. 



3. Trophon. 



Shell ovate ; spire short, with numerous lamellar varices on each 

 whorl ; mouth ovate ; canal moderate, open, rather bent to the 

 right. Eyes on short tubercles. 



1. T. patagonicum, t. 89. f. 2. 



2. T. Bamfium, Forbes 8f Hartley, B. M. t. S.S. f. 3. 



3. T. echinatum, Forbes fy Hartley, B. M. t. S.S. f. 4. 



4. T. Barvicense, Forbes $• Hartley, B. M. t. S.S. f. 5. 



** Hinder edge of mantle and outer lip with a tubular canal. 



4. Typhis. 



Shell ovate ; spire short, with three or more thin varices on each 

 whorl, and with a tubular canal at the hinder part of the outer lip ; 

 anterior canal short, bent up, tubular. 



1. T. pungens. 



b. Colusina. Varices of shell rudimentary or none. Inner lip 

 smooth. Operculum ovate, acute ; nucleus apical (fig. 8). 



5. Colus. 



Animal red. Operculum ovate, acute. Shell Fig. 8. 



fusiform; spire elongate, conic; canal more or Operculum of Colus. 

 less elongate, straight ; inner lip smooth. 



1. C. multicarinatus, t. 90. f. 2. 



2. C. australis, t. 9. f. 3. 



3. C. ? t. 9.f. 2. 



4. C. raphanus, t. 9. f. 1. 



5. C. dilatatus, t. 9. f. 5. 



6. C. polygonoides. 



G. Clavella. 



Shell fusiform or turbinate ; last whorl large, irregularly enve- 

 loping the rest ; inner lip smooth. Operculum acute. Teeth ? 



1. C. scrotina. 



