TEREBRATULA. 
Prats VIL. 
Species 24. (Mus. Cuming.) 
TEREBRATULA (TEREBRATELLA) SPITZBERGENSIS. Ter. 
testa snioblongo-ovati, tenuiculd, pellweido-albd, cor- 
ned, vostro producto, erecto-incurvo, foramine amplo, 
subtrigono, weltidio elungato, partito ; valvis ambabus 
modicé conveuis, levibus, lineis incrementi concentrice 
liratis ; apophyse breviusculd, reflexd, septo valde pro- 
minente, 
THE SpItzBERGEN TEREBRATULA. Shell somewhat ob- 
long-ovate, rather thin, transparent white, horny, 
beak produced, erectly incurved, foramen large, rather 
triangular, deltidium elongated, divided; both valves 
moderately convex, smooth, concentrically ridged with 
lines of growth; loop short, reflected, septum very 
prominent. 
Davison, Pro. Zool. Soc. 1852, p. 78. 
Hab. Spitzbergen. 
This narrowly-ovate species, in which the beak is con- 
spicuously produced and curved in an erect manner, is of 
the same transparent horny tenuity as 7’ vitrea, more 
largely punctured. It is very much smaller, and has the 
loop of Zerebratella, elongate and reflected, attached to a 
‘central septum of more than usual prominence. 
Species 25. (Fig. a, Mus. Cuming; Fig. , c, Mus. 
Taylor.) 
TEREBRATULA (TEREBRATELLA) SANGUINEA. Ter. testd 
ovatd vel trigono-ovatda, plus minus trifariam flecuosd, 
tenuiculd, albidd, vivide sanguineo radiatim interrupte 
lentiginosd, rostro breviusculo, foramine interdum in- 
tegro, interdum deltidio partito ; valvis ambabus con- 
vexis, versus umbones medio subproductis ; apophyse 
parca, reflexd, septo parvo, brevissimo. 
THE BLOOD-STAINED TEREBRATELLA. 
triangularly ovate, more or less tripartitely flexuous, 
rather thin, whitish, radiately interruptedly freckled 
with bright blood-colour, beak rather short, foramen 
sometimes entire, sometimes with the deltidium di- 
vided; both valves convex, rather produced in the 
middle towards the umboes; loop small, reflected, 
septum small, very short. 
Anomia sanguinea, Chemn. Couch. Cab. vol. viii. p. 96. 
pl. 78. f. 706. 
Terebratula sanguinea, Sowerby. 
Shell ovate or 
Terebratula pulchella, Sowerby. 
Terebratella sanguinea, Davidson. 
Megerlia pulchella, Davidson. 
Hab. Philippine and Sandwich Islands. 
An examination of more than a dozen specimens of this 
charming species, most of them with the soft parts mace- 
rated so as to afford excellent comparisons of the loops, 
has convinced me that Mr. Sowerby’s 7. pulchella (Meger- 
lia pulchella, Davidson) is merely a variety of the old Ano- 
mia sanguinea of Chemnitz, in which the deltidium plates 
are forced apart by circumstances in its mode of attach- 
ment in a manner to expand the foramen. The apophysis 
is the same in both forms. It differs materially from the 
typical apophysis of Terebratella, but is nearer to it than 
to the apophysis of Megerlia. The loop is comparatively 
small and shortly reflected. It is supported on a cross 
attachment, but the septum leading to this is very small, 
so that the whole apophysis passes scarcely more than half- 
way into the valve. It may be said to be intermediate be- 
tween Terebratella and Terebratula proper, rather than 
Megerlia. The bright blood-red painting with which both 
valves are radiately freckled is not an unimportant charac- 
teristic of the species. 
Species 26. (Fig. a, Mus. Cuming; Fig. 4, Mus. Brit.) 
TEREBRATULA (TEREBRATELLA) RUBELLA. Ter. testd 
suboblongo-ovatd, ad marginem obscure trigond, rubella 
vel aurantio-rubrda, rostro modicé producto, foramine 
parviusculo, deltidio plerumque subpartito ; valvis am- 
babus convewiusculis, medio tumidis ; apophyse subelon- 
gata, dupliciter affixd. 
THE RUDDY TEREBRATELLA. 
obscurely triangled at the margin, ruddy or orange- 
red, beak moderately produced, foramen rather small, 
with the deltidium mostly a little divided; both valves 
rather convex, swollen in the middle; loop rather 
elongated, doubly attached. 
Terebratula rubella, Sowerby, Thesaurus Conch. vol. i. 
p- 350. pl. 69. f. 40-42. 
Terebratella rubella, Davidson. 
Hab. Bass’s Straits, Australia (dredged from a depth of 
twenty-seven fathoms) ; Calvert. 
Shell rather oblong-ovate, 
Though uniformly of smaller size, this species very much 
resembles, both in form and colour, 7. (Waldheimia) pieta 
February, 1861. 
