TEREBRATULA. 
Puate LV. 
Species 12. (Mus. Cuming.) 
TEREBRATULA (TEREBRATULINA) Cuminat. er. testd 
quadrato-ovatd, subpentagonali, opaco-albd, radiatim 
liratd, liris aliis versus marginem intervenientibus, om- 
nibus tenue crenulatis, rostro suberecte producto, oblique 
truncato, foramine amplo, imperfecto, deltidio feré ob- 
soleto ; valvis subgibboso-convexis, margine serratis ; 
apophyse parvd, anelliformi. 
Comine’s TEREBRATULINA. Shell squarely ovate, nearly 
pentagonal, opake-white, radiately ridged, with other 
ridges intervening towards the margin, all finely cre- 
nulated, beak somewhat erectly produced, obliquely 
truncated, foramen large, incomplete, deltidium al- 
most obsolete ; valves rather gibbously convex, ser- 
rated at the margin; loop small, anelliform. 
Davipson, Pro. Zool. Soc. 1852, p. 79. pl. 14. f. 17 
to 19. 
Hab. China Seas. 
An extremely characteristic well-defined species. The 
radiating ridges do not all diverge together from the beak ; 
a new ridge commences between each former ridge as the 
space enlarges to receive it. 
Species 13. (Mus. Cuming.) 
TEREBRATULA (TEREBRATULINA) CANCELLATA. Ter. 
testa ovato-oblongd, subflecuosd, livido-fuscd, radiatim 
densé lineari-sulcatd, sulcis striis concentricis incre- 
menti decussatis, rostro subproducto, foramine amplo, 
integro, deltidio rugoso, indiviso ; valvis inequalibus, 
dorsali planiusculd ; apophyse brevi. 
THE CANCELLATED TEREBRATULINA. Shell ovately ob- 
long, rather flexuous, livid-fuscous, radiately densely 
linearly grooved, grooves decussated by concentric 
striz of growth, beak rather produced, foramen large, 
entire, deltidium rough, undivided; valves unequal, 
the dorsal rather flat; loop short. 
Terebratula cancellata, Koch, Kuster, Conch. Cab. vol. vii. 
pl. 24. f. 11 to 13. 
Hab. e 
Of a peculiar livid-brown colour, fully distinguished 
from 7’. caput-serpentis among other characters by its square 
form and produced beak, with entire foramen and delti- 
dium. 
Species 14. (Mus. Cuming.) 
TEREBRATULA (TEREBRATULINA) aByssIcoLa. er. 
testa trigono-pyriformi, aurantio-carned, radiatim ob- 
solete liratd, liris distantibus, striis bifurcatis nume- 
rosis intervenientibus, rostro obtuse producto, fora- 
mine subamplo, imperfecto, deltidio obsvleto ; apophyse 
brevi. 
THE DEEP-DWELLING THREBRATULINA. Shell triangu- 
larly pear-shaped, orange flesh-colour, radiately obso- 
letely ridged, ridges distant, with numerous bifurcated 
strize coming between them, beak obtusely produced, 
foramen rather large, incomplete, deltidium obsolete ; 
loop short. 
Terebratula abyssicola, Adams and Reeve, Moll. Voy. Sa- 
marang, p. 72. pl. 21. f. 5. 
Terebratulina abyssicola, Davidson. 
Hab. Cape of Good Hope (dredged at the depth of 120 
fathoms); Belcher. 
The foramen in this species is not entire, as described 
in the Museum Catalogue. It is incomplete, as in 7. 
caput-serpentis, and the deltidium is almost obsolete. 
Species 15. (Fig. a, Mus. nost.; Fig. 6, Mus. Cuming.) 
TEREBRATULA (TEREBRATULINA) CAPUT-SERPENTIS. 
Ter. testa trigono-pyriformi, subpentagonals, albida, in- 
terdum ferrugineo tinctd, dense radiatim lirata, liris 
bifurcatis, subgranulatis, rostro attenuato-producto, ob- 
lique truncato, foramine subamplo, imperfecto, deltidio 
fere obsoleto, valvis ambabus convexis interdum antice 
flexuoso, compressis, ad latera subauritis ; apophyse 
brevi. 
THE SNAKE’S-HEAD TEREBRATULINA. Shell triangu- 
larly pear-shaped, somewhat pentagonal, whitish, 
sometimes rust-stained, densely radiately ridged, 
ridges bifurcated, slightly granuled, beak attenuately 
produced, obliquely truncated, foramen rather large, 
incomplete, deltidium almost obsolete, both valves 
convex, sometimes flexuously compressed in front, 
somewhat eared at the sides ; loop short. 
Anomia caput-serpentis, Linnzus, Syst. Nat. p. 1153. 
Anomia retusa, Linneus. 
Anomia pubescens, Linneus. 
Terebratula pubescens, Miiller. 
Terebratula caput-serpentis, Lamarck. 
November, 1860. 
