864 



MANUAL OF THE MOLLTJSCA. 



Distribution, 3 species. Mediterranean 90 — 250 fathoms on 

 nullipore mud. (Forbes.) YigoBay; Falkland Islands. 



Fossil, 126 species. Devonian — . World-wide. 



Sub-genera. Terebratulina (caput-serpentis), D'Orbigny. (PI 

 XV., Fig. 3.) Fig. 148. Shell finely striated, aiiriculatev 



Fig. 148. Dorsal valve. Animal, ^. 



deltidium usually rudimental ; foramen incomplete ; loop 

 short, rendered annular in the adult by the union of the oral 

 processes. Distribution, 6 species. United States, Norway, 

 Cape, Japan. 10— 120 fathoms. jFossi7, 22 species. Oxfordian — . 

 United States. Eiu'ope. 



Waldheimia (australis), King. PI. XY., Fig. 4 (p. 5, 

 o, 6), Figs. 145, 149, 150. 



■i 



-Z 



Figs. 



Fig, 149. Dorsal valve. 



Flf'. 150, Ventral valve. 



Fig. 149. J, cardinal process ; V, dental sockets; p, hinge-plate ; s, septum ; c, crma 

 of the loop ; /, reflected portion of the loop ; m, quadi'uple abductor-impression. 



Fig. 150, /, foramen ; d, deltidium; t, teeth ; a, single abductor impression ; r, car- 

 dinal muscles ; x, accessory muscles ; p, pedicle muscles ; v, position of the vent ; z, 

 attachment of pedicle-sheath. 



Shell smooth or plaited, dorsal valve frequently impressed; 

 foramen complete ; loop elongated and reflected ; septum (s) of 

 Bmaller valve elongated. Distribution, 9 species. Norway, 

 Java, Australia, California, Cape Horn. Low water — 100 



