232 PERRONA. 



cord ; yellowish white, flexuously lineated with chestnut, the 

 corded portion white. Length, 40 mill. 



W. Africa. 



Possibly only a heavy shelled variety of C. lineata. I think 

 that C. tripartita (Smith), Weinkauff (fig. 4), is synonymous, as 

 I have specimens intermediate between the two forms. 



C. SPIRATA, Lam. PL 8, fig. 5. 



Whorls constricted around the upper part, with a rather sharp 

 ridge next the suture, and an obtuse angle below the constric- 

 tion ; yellowish, mottled and striped with chestnut. 



Length, 1-1-5 inches. 



W. Africa. 

 C. PERRON, Chemnitz. 1*1. 8, fig. 8. 



Shell fusiform, turreted, rather smooth^ pale yellow; whorls 

 flat, with flexuous longitudinal lines, slightly angulated round 

 the upper part, lower portion of the last whorl contracted and 

 with several regular, distant revolving ridges ; sinus nearly cen- 

 tral. Length, 27 mill. 



W. Africa (Mar rat). 



Is an intermediate form between C. lineata and C. spirata 

 which should probably be merged in one species. Chemnitz 

 adopted a Dutch name " the perron," for this species, and Reeve 

 erroneously supposing it to be in honor of a naturalist, changed 

 its form to (7. Perronii. 



C. MONILE, Yal. PL 7, fig. 96. 



Chestnut-brown, with a subsutural band maculated with 

 darker chestnut spots ; surface finely decussated with longitu- 

 dinal and spiral striae* Length, 1 inch. 



Australia. 



Pleur. monile being preoccupied by Brocchi for a fossil species, 

 Desmoulins changed the name to Quoyi ; but the species figured 

 under the latter name by Reeve and Weinkauff appears to me to 

 be very distinct In the present group the specific name monile 

 is not preoccupied ; I therefore restore it. 



C. GRACILIOR, Sowb. (Unfigured.) Habitat unknown. 



C. TUMIDA, Sowb. (Unfigured.) Agulhas Bank, So. Africa. 



