516  Mr.Sowznnx on the Spiral Tubes in the Terebratula. 
there appears a nearly triangular appendage to the cartilage, 
- which, if not possessed of the outer shell, might indicate a trian- 
gular foramen. I presume to lay this sketch before the Linnean 
Society, hoping that the subject will meet with attention and in- 
vestigation when opportunity offers. The construction of the 
shells in my former communication would, without the present 
specimen, have given an idea of the straight hinge being peculiar 
to those Terebratule with a spiral cartilage, as agreeing with 
Parkinson and Martyn, and might therefore have been mislead- 
ing. The spiral remains in the present species seem rare, as most 
of the sliells are filled with a hard marley earth. It was found 
with some other species in Sladacre's Quarry, on the right-hand 
side of the road leading from Wych to Calwell-Green, a part of 
the Malvern hills. Some specimens. had small round joints of 
Enara on them. 
EUR, XXVIII. 
Fig. 3. "Téseitotula obtusa. The remains of the spiral cartilage and 
the somewhat triangular appendage; the shell having 
been worn off. | 
Fig. 4. The marle cast nearly covered with the shell and two small 
round joints of an Encrinus, perhaps the new species 
mentioned by Mr. Horner* as found also at the Mal- 
-vern hills. 1 
I add also. a drawing of a small Terebratula, which might be 
called. T. sinuata, with a straight hinge. It seems plentiful in a 
marley stratum somewhere. I do not think it is noticed in any 
work; and I shall be glad to learn its locality. | 
Fig. 5. T. sinuata, natural size. | 
a. Upper side. b. Under side. 
Fig. 6. T. sinuata, magnified upper side. — 
* Trans. of Geological Society, vol. 2. cl de en 
XXXI. On 
