136 BrJLVA, ITS PEOPLE AXD PRODUCTIONS. 



Sub-famihj SCROBICULARIIXJE. " 



SIkU thin, subcquivalve, gaping, and oflen flexuous posteriorly. Ligament 

 internal. 



ScROBicuLiUJiA, Schumacher. 



Hinge with one or two teeth in each valvo, and an internal spatulate cartilage- 

 pit. Pallial sinus large. 



" In this genus the orifices of the siphons are plain, the mantle is denticulated, 

 and the foot is large and compressed. The animals usually live buried vertically 

 five or six inches deep in the mud of tidal estuaries : the siphons can bo extended 

 five or six times the length of the shell." (Adams.) 

 * ,, coBDii'OEMis, Chem. 



,, ANGULATA, Chem. 



Sub-fam'ihi TAPnilX.^E. 



!Mesodes3ia, Bcshayes. 



Shell ovate, subequilateral. Hinge with the lateral teeth, short, subequal. 

 A single primary tooth, and a rudimentary process in place of a second. Ligament 

 in an iuterual pit. Epidermis greenish-brown. 



* ,, INTEKMEDIA, RcBVC. 



* ,, ovATA, Eeeve. 



Faiiiilii Solenidae. 



Foot large, elongated, thick, not byssiferous. Shell elongated, cquivalve, and 

 gaping at both ends. Hinge with two or three compressed teeth in each valve, the 

 hinder one bifid. Ligament large, e.vtei'nal, supported on a prominent shelf. 



These shells, or " Razor fisli," as they are called, live vertically buried in sand. 

 They are sensitive, timid, and difficult to capture, but are good eating. They may 

 be sometimes forced to ascend to the surface by putting salt in their holes, but they 

 must be cleverly caught, or they will descend if frightened, and no additional salt 

 on their tails will persuade them to come up again. 



SoLEN, Linncnis. 



Shell straight, margins parallel, beaks gaping, terminal. Ligament long, 

 external. Pallial sinus short, scjuare. 



* ,, BEE VIS, Gray. 



Ctjltellus, Schumacher. 



Shell rounded and gaping at each end. Beaks subanterior, supported internally 

 by an oblique rib. 



* ,, CTJLTELLtfS, L. 



SiLiQUA, Megerle von MuJilfcldt. 



Shell curved, oblong, polished, gaping at the ends, and strengthened internally 

 by an elevated umbonal rib. 



* ,, EADIATA, L. 



SoLECUETUs, Blainville. 



Shell compressed, rounded, and gaping at the ends. Hinge with two diverging 

 primary teeth in each valve. 



* ,, coNSTiticTus, Lam. 



* ,, INKLEXUS, Wood. 



* ,, NivEus, Desh. 



