174 CONCHOLOGY. 



C. cervus. C. archiepiscopus. 



C. stercus-muscarum. C. canonicus. 



C. Timorensis. C. episcopus. 



C. nimbosus. C. abbas. 



C. dux. O, legatus. 



C. tendineus. C, textilis. 



C. praefectus. C. pyramidalis. 



C. melancholicus. C. gloria-maris. 

 C. Australis. 



C. textilis. The embroidered Cone. PL 31, fig. 2. 

 Species ovate, slightly elongated ; the spire rather pro- 

 jecting, pointed, not coronated. 



C. imperialis. The imperial Cone. 



Species conic, spire coronated, projecting, or flat. 



C. striatus. The striated Cone. 



Species oblong-ovate, gibbous, not coronated, clouded and 

 strongly striated transversely. 



C. generalis. The general Cone. 



Species conic, spire projecting, not crowned with tuber- 

 cles ; colour reddish brown, or clouded with orange and in- 

 terrupted fillets. 



C. mustelinus. The Weasel Cone. PI. 31, fig. 1. 



Species with base sub-truncated ; spire channelled and 

 banded with orange spots ; body whitish, encircled in the 

 middle by orange-spotted bands. 



FAMILY XXI. 



Nautilacea. Two genera. 



1. Spirula. One species. 

 An involute, symmetrical, discoid shell, whose whorls do 

 not touch each other ; the septa or partitions are brilliant 

 pearl, concave externally, pierced by a tube called the siphon 

 or siphuncle, placed close to the inner edge of the aperture ; 

 covered with a thin epidermis. 



