VERMETUS. 173 



anterior extremity free. Operculum plain, thin. Animal dark 

 P ur P le - Southern Europe. 



It is Ser/jida ylomerata, of Linn., 12th Eilit., but not of 10th 

 Edit., and V. intortus, Weink. " I have examined five or six 

 groups without finding- any internal laminae, as Sowerby and 

 Moore appear to have done. In a comparatively few specimens 

 I have found a distinct medial lira on the coluraella." MORCH. 

 This author describes vars. OCCLUSA, SUTURALIS and SCOLO- 



PENDRINA. 



V. VERMICELLA, Lam. PI. 49, fig. 33. 



Yellowish, filiform, narrow, transversely rugose, fiexuous, 

 without longitudinal sculpture, conglomerated into a dense mass. 



W. Africa. 



It is V. ylomeratux, Daudin, V. Lixpe, (Adanson), Deshayes. 

 Morch describes a var. FILARIS. 



Y. ANELLUM, Morch. PI. 49, fig. 34. 



Shell sinistral, spirorbiform, white, spire affixed, umbilicus 

 open, whorls few, with transverse close ribs. Diameter of shell 

 about 2 to 3-5 mill. 



Todas Santos Bay, L. California (on Haliotis). 



Very like a Spirorbis in shape, and " perhaps will prove to be 

 the type of a new genus." MORCH. 



Section MACROPHRAGMA, Carpenter, 1857. 

 V. MAOROPHRAGMA, Carp. PI. 48, fig. 10. 



Shell small, chestnut-colored, laterally attached, often eroding, 

 spirally twisted, first whorls flattened, contiguous, the last 

 loosely contorted, with close longitudinal lirae and incremental 

 striae ; interior armature (see figure). 



San Diego, Gal., L. CaL, Mazatlan, Eealejo. 



" V. contortus, Carp., is perhaps the adult stage of this species, 

 which again possibly may be a form of Aletes centiquadrus." 

 MORCH. 



V. COCHLIDIUM, Carpenter. PL 48, fig. 17. 



Distinguished from the preceding species by its internal 

 laminae ; the shell is of a lighter color and larger growth. 



Australia ; var. from Tahiti. 



