80 MR. J. COSMO MELVILL ON 



harbour the largest number of species, the second and 

 third containing one species apiece, and the last two or 

 three species. 



I. Textilia. 

 a. vera. 



Shell yellow-brown, with undulating longitudinal lines 

 of umber, interrupted by triangular white spaces; spire 

 raised, similarly marked. 



Under this I group the well-known C. textile (L.), the 

 " Field of the Cloth of Gold " of the old conchologists : 

 an exceedingly variable shell, whose forms and limita- 

 tions it is almost impossible to define. It abounds in all 

 eastern tropical seas, and, as before observed, a form, the 

 C. Dalli (Stearns), has been detected once on the Calif or- 

 nian coast. 



The named forms of C. textile are as follows : — 



i. tigrinus (Sowb.). More or less destitute of the brown 

 bands and brown longitudinal markings. 



ii. vicarius (Lam.) . Pattern coarser and larger in detail, 

 greater preponderance of white triangular patches. 



iii. verriculum (Reeve). Short and stumpy, and coarsely 

 marked. 



iv. concatenatus (Sowb.). Like No. iii., but of simple 

 zigzag marking. 



v. scriptm (Sowb.). A delicately striated form, more 

 finely marked than canonicus, but otherwise similar. 



vi. canonicus (Brug.). No brown markings, more finely 

 marked than vicarius ; a very distinct and well- 

 known form. 



vii. condensus (Sowb.). A beautiful small shell, with 

 constant pink tinge, marked as scriptus. 



