bo 
bo 
Se 
VERMETIDZ. 
Famity VERMETID 4. 
Animal with rudimentary foot, head long, with two long 
conical tentacles, and eyes at their outer bases; proboscis re- 
tractile; on the sides of the buccal orifice are additional tentacles 
or buccal appendages, also conical. Operculum circular, some- 
times spiral. 
Shell tubular, attached; sometimes regularly spiral when 
young; always irregular in its adult growth; tube repeatedly 
partitioned off; aperture round. 
The Vermetide are distinguished from the very similar shells 
of the annelid genus Serpula by the presence of a spiral, nuclear 
shell and of concave smooth interior septa. The shell of Serpula 
is composed of two calcareous layers, that of Vermetide of 
three. 
VerRMETUS, Adanson. 
Shell irregularly spiral, or contorted tubular ; free, or attached 
by one side like some of the annelids ; operculate. 
The following subgenera were considered distinct genera by 
Morch : 
VERMICULUS, Lister. (Vermetus of authors, not Adanson.) 
The shell is in its early stage regularly coiled like a Turritella, 
and afterwards with the last whorl uncoiled, variously twisted, 
or more or less straight and prolonged. There is apparently no 
other distinction between the shells of Vermiculus and Burti- 
nella, except that the latter are coiled in a broad, largely 
umbilicated cone. 15 sp. Carboniferous—living. Tropical and 
subtropical. V.lumbricalis, Linn. (1xvii, 68). 
BURTINELLA, Morch. (Morchia, Mayer.) Adult shell free, 
young aflixed, thick, widely conically elevated, trochiform or 
planorboid, usually sinistral, rarely dextral; whorls regularly 
increasing in size, tubular within, angular without; the last 
whorl dissolute, more or less prolonged, not constricted ; aperture 
circular, margin continuous. Fossil, 15 sp. Oolitic, Cretaceous, 
Tertiary ; Europe, India. 8B. concava, Stol. (xvii, 69, 70). 
STREPHOPOMA, Moreh. Adult shell affixed, solitary or clustered ; 
aperture slightly inflexed above, very obsoletely effused below. 
Operculum arctispiral, furnished with long multifid sete. 
Recent, 4 sp. S. rosea, Quoy (Ixvii, 71). The shells are gen- 
erally very small, and usually so tender as to be very rarely 
found fossil in a good state of preservation. Difficult to distin- 
guish from Vermiculus. 
TUBULOSTIUM, Stoliczka. Shell free, planorboid to broadly 
conical, aperture contracted, prolonged in a tube. 4 sp. 
Jurassic; Europe. ‘Tertiary; United States. Cretaceous ; 
India. 7. callosum, Stol. (Ixvii, 72, 73). 
SIPHONIUM, Browne. (Stoa, M. de Serres.) Shell adherent, 
