TEREBRATULA.—Puarte VIII. 
Hab. New Zealand. 
A pretty ovate or fan-shaped semitransparent shell, 
tinged more or less with orange-red, in which the loop, | 
commencing to be of a lamellar anchor-shape at its second 
place of attachment, partakes rather of the character of 
Magas than of Terebratelia. 
yields to my suggestion that his Waltonia Valenciennesit 
and Terebratula Evansii ave one and the same thing. 
The shell represented at Fig. 31 4 is a specimen of un- 
usually large size in the collection of Mr. Cuming, while | 
that at Fig. 31 ¢, from Mr. Taylor’s collection, is a speci- 
men of the ordinary dimensions, attached to a dead valve 
of Cardita. 
Species 32. (Mus. Cuming.) 
TJEREBRATULA (MaGAs) CRENULATA. Ter. testd orbicu- 
lari, fulvescente-albd, corned, radiatim costatd, costis 
subdistantibus, interstitiis liris tenuibus concentricis cre- 
nulatis, rostro brevi, tumido, subtus utrinque concavo- 
depresso, foramine amplo, deltidio partito ; valvis con- 
vexis, medio subproductis ; apophyse dupliciter affiad, 
septo utrinque lamellato, subanchoralr. 
THE CRENULATED MacGas. Shell orbicular, fulvous- 
white, horny, radiately ribbed, ribs rather distant, 
‘interstices crenulated with fine concentric ridges, 
beak short, swollen, concavely depressed on each 
side, foramen large, deltidium divided; valves convex, 
rather produced in the middle; apophysis doubly 
attached, septum lamellated on each side, somewhat 
anchor-shaped. 
Terebratula crenulata, Sowerby, 
p- 358. pl. 71. f. 96 to 98. 
Terebratella crenulata, Davidson. 
Thesaurus Conch. vol. i. 
Magas crenulata, Gray. 
Hab. Santa Cruz, Canaries; Cuming. 
This species, of which only a single specimen is at pre- 
sent known, has somewhat the appearance of a 7. Labra- 
dorensis or of a small T. Magellanica, but the valves are 
evenly convex and ribbed, Pecten-like, and the interstices 
between the ribs are crenulated with fine concentric ridges. 
And to these characters may be added the more important 
one of the apophysis being lamellated on each side like | 
the flukes of an anchor, as in Magas Valenciennesii, and 
Mr. Davidson generously | 
THE TULIP BoucHarRDIA. 
which constitutes its subgenerie distinction from Terebra- 
tella. The habitat is certainly peculiar. 
Species 33. (Pig. a, 6, c, Mus. Cuming.) 
TEREBRATULA (BoUCHARDIA) TULIPA. Ter. testa ob- 
longo-ovatd, subangustd, depressd, levigata, fuluescente- 
rosed, carmineo-roseo tincta et sparsim radiata, rostro 
trigono-acuminato, foramine parvo, terminali, deltidio 
obsoleto, ared medio excavato-sulcatd ; valvé dorsali 
plano-converd, ventrali versus rostrum conspicue pro- 
ducté ; cardine valde calloso, plicis crassis longis 
interclausis composito ; apophyse valdé callosi, rudi, 
anchoralt. 
Shell oblong-ovate, rather 
narrow, depressed, smooth, fulvous-rose, stained and 
sparsely rayed with deep crimson-rose, beak triangu- 
larly acuminated, foramen small, terminal, deltidium 
obsolete, area excavately grooved in the middle; dor- 
sal valve flatly convex, ventral conspicuously produced 
towards the beak; hinge very callous, composed of 
long thick interlocking plates; apophysis very cal- 
lous, rude, anchor-shaped. 
Terebratula tulipa, De Blainville, Dict. Sci. Nat. vol, liii. 
p. 144. 
Bouchardia tulipa, Gray. 
Terebratula rosea, Humphreys, ined. 
Bouchardia rosea, \)avidson. 
Pachyrynchus roseus, King. 
Hab. Rio Janeiro, Brazil (dredged from a depth of thirteen 
fathoms) ; Macgillivray. 
The Lerebratule Cumingii, fibula, and tulipa, associated 
in subgenus Bouchardia, ave distinguished from all other 
Terebratule by the structure of the shell’s beak, which is 
acuminated, and has the foramen at its extremity. The 
deltidium plates are therefore dispensed with, and the 
lengthened area which occupies their place is either 
simply flat as in B. fibula, or excavately grooved as in B. 
Cumingii and tulipa. Along with this change in the 
structure of the beak there is a change in the interior of 
the shell. The apophysary skeleton, retaining the anchor 
form of Magas, solidifies and becomes almost rudimentary ; 
and callosities commence to be formed about the hinge of 
B. Cumingit until they assume, in B. tulipa, the function 
| of heavy interlocking plaits. 
