286 General Notes. [March 
point of view. His views we may present in a subsequent 
number of this magazine.—A. S. Packard. 
EXPLANATION OF, THE FIGURES. 
Ler G.—a, a, circular thickening oft the skin wing do, the ae - the 
elaine sats ax, thread-like continuation of the nerve-cell; 4, vesicle-like bottom of 
z, entrance into pe canal PE to the pit; , olfactory membrane; m, m”, mc. 
membrane-forming cell; 2, nerve of special sense; nc, nucleus of pek sense- or gan- 
glion-cell; 0, opening into the olfactory pit ; Ż, olfactory pit; cf, compound gel 
pw, wall of the pit; s, a large seta; sc, sense- or ganglion-cell; i olfactory o 
senyen, sometimes peg-shaped ; artile bristle. 
a 
Fic. Ifactory organ of Calop 
Fic. $ Longi tudi nal section through the third antennal See a a fly (Cyrto- 
—— a tabula), showing the compound m above and in 
pits fro 
. Vertical ners through a single en arbe pit in the pe uada of the horse- 
fly (Tabs bov. 
G. 4. Amai pit of Melolontha vulgaris, seen in vertical section. 
Fi = 5- Section through an olfactory pit of Vespa crabro. 
G. 6. Section through gia joint of Vespa crabro, showing the great number 
Olfactory pits of ha aiten a of Melolontha eo ata 
Fie. 8. Olfactory pits of the sion of Stenobothru 
tise mt melanie! pits of the antenna of Bombus. Fics. 7-11, after Kraepelin. 
2. Organ of smell of Anophthalmus. After Hauser. 
ZOOLOGY. 
Notes on the Larger Florida Planorbe es.—Having occasion 
lately to examine a number of Planorbes from Florida, I noticed 
give the species. I give below notes on all the species I have 
received from the State. 
Planorbis trivolvis Sa 
this species from several Pacific coast localities I found it 
- abundant and typical in eee Texas. It has, thus, a range 
. trivoluis. 
P. tumidus Pfr. is not an uncommon species in the peninsula, 
_ though hitherto overlooked, probably confused with (rit ted or 
— Mesi 
species in some characters, rom t the Aher known Planorbes, 
glabratus is quite distinct. ` Distribution probably the same as 
shy tumidus, but decidedly local, according to the information 
P daryi Waha k a is a form widely spread and apparently 
