HAPtDWICKE'5 SCIENCE-GOSSIP. 



155 



be the iuterpretation of the form 95, The lower 

 part of the shell terminates in a blunt point, and 

 is bent to one side (figs. 87, 89, 91), in this re- 

 sembling the pe/i of the uncinated calamary.* One 

 specimen shows the former presence oi fins (fig. 

 94, li). The upper part of the shell seems to 

 Lave been rounded off, and slightly depressed on 

 one side ; in this remiudiug one of the peu of Sepia 

 Orbigniana.\ 



this seems to be an entirely new species, I would 

 propose to name it Orthoeeras pennatmi, or finned 



Fig. 94. 



Fig. 95. 



Fig. 92. Portion of external wall of shell. 



Fig. 93. Exterior, showing parallel rings. 



Fig. 94. Lower portion of shell in situ, showing supposed 

 fins. 



Fig. 95. Portion of upper part of shell, showing approxi- 

 mation of rings. 



Dr. Woodward considers % that the shells of the 

 Orthoceratidte were external. In many species this 

 was most probably the case. But, in the present 

 species, all the remains seem to indicate that it was 

 an internal shell, having the same kind of functions 

 to perform as the Belemnite, which is an acknow- 

 ledged internal shell. The presence of fins, and the 

 large upper chamber, rounded at the top, as well 

 as the delicateness of the shell, seem to indicate 

 this. 



I have attempted in figs. 96, 97 to restore the 

 former appearance of this shell, fig. 96 being its 

 supposed external form, and fig. 97 a section. As 



Orthoeeras 



J. S. TUTE. 



Fig. 96. Restoration of Orthoeeras 

 pennatum. 



Fig. 97. Restored section 

 of ditto. 



* See Woodward's "MoUusca," Plate I. fig. 8. 

 t Ibid., Plate II. fig. 2.' J Ibid., p. 87. 



THE EMPEROR MOTH. 

 {Saturnia carpini.) 



AYW^ interesting notes on this handsome, but 

 happily not uncommon, moth appeared in 

 SciENCE-Gossir last year, at page 230. The cater- 

 pillar, however, was dismissed with the short state- 

 ment that it " is a delicate pea-green, each segment 

 having a broad band of black, adorned with pink 

 tubercles, each of which emits a few hairs." This 

 description applies only to the larva in its last stage, 

 and perhaps a few notes on the earlier stages may 

 not be unwelcome to some entomological readers. 

 The changes which it undergoes are certainly very 

 remarkable ; being a very prominent object in its 

 adult stages, it is then found with little difficulty ; 

 but probably many a young collector on the search 

 for " pretty " caterpillars passes it by in its juvenile 

 form. I have not reared it from the &gg, so that I 

 am unable to describe its first appearance. The 



