Editorial Comment. 43 
true conch, similar to the plug which is sometimes found fill- 
ing the distal fractured extremity of the sipho of orthocera- 
tites. The similarity of structure in the true conch of Belem- 
nilvs, Bactrites, and Orthoceras, is now increased hy the dem- 
onstration of like protoconchs in all. 
Explanation of Plate II. 
Fig. 1. A reduced copy of Branco's figure of the protoconch of Bac- 
trites. x20. 
Fig. 2. Dorsal view of an internal calcareous cast of B. cf. gracilis, 
showing the usual appearance of the sutures, the undulations of the 
body chamber and the expanded aperture. x.|. Naples. N. Y. 
Fig. 3. Interior of a portion of the shell of Bactrites cf. gracilis, show- 
ing the intra -margin al position of the siphonal collar. \4. Honeoye 
Lake N. Y. 
Fig. 4. A shell retaining the protoconch and showing the expansion 
of the initial tube and the ornamentation (/>. cf. gracilis). xlG. Hone- 
oye Lake, X. Y. 
Fig. 5. Dorsal view of a shell with a fractured protoconch. the tube 
itself being broken along the line of the sipho (B. cf. gracilis). xl6. 
Honeoye Lake, N. Y. 
Fig. 6. Internal cast of a protoconch-bearibg shell, probably B. aci 
Cltlum. xl6. Honeoye Lake, X. Y. 
Fig. 7. The distal surface of the first septum (somewhat broken), 
showing the lateral position of the sipho. The margin of the septum on 
the left is the line between light and shade. x50. 
Fig. 8. A Bactrites broken along the dorsum, gxposing ten septa, some 
of which retain the siphonal collar; also showing the expansion of the 
shell just above the detached protoconch. x!6. Honeoye Lake, N. Y. 
FiG.it. An internal cast in pyrite of a young Bactrites (aciculum), 
with body chamber and two air chambers. xl6. Middlesex. N. Y. 
EDITORIAL COMMENT. 
Death of Mi;. Wm. Pengelly. 
To geologists and archaeologists alike the news of the death 
of Mr. Wm. Pengelly, of Torquay, England, will he cause of 
regret. Mr. Pengelly was so well and SO long known as the 
patient and thoroughgoing explorer of Buxham cave and 
Kent's cavern, under the auspices of the British Association, 
that it seems as if a conspicuous figure had disappeared from 
the field of science. His strong personality and utter engross- 
ment in the work to which he devoted the lust thirty years of 
