376 General Notes. { May, 
tinctly striated, and the blood corpuscles small. The intestine 
has the portion in front of the rectum dilated; this is especially 
notable in S. gratig, where this part of the alimentary canal is 
usually filled with the remains of undigested vegetable food. The 
distal, thin, laminar elements of the jaws and maxillz are deeply 
toothed and much resemble those of Campodea, as figured by 
Meinert. 
This form, as interpreted above, becomes of the highest interest 
to the zoologist, and if the writer is not mistaken, the biunguiculate 
legs and their nearly complete correspondence in number with 
the rudimentary abdominal and functional thoracic limbs of the 
Thysanura, especially Machilis and Lepisma, which also have 
basal appendages to the legs, indicate as much affinity with in- 
sects as with myriapods, and may indeed be looked upon, per- 
haps, as representing the last survival of the form from whic 
insects may be supposed to have descended. I name the new 
group Symphyla, in reference to the singular combination of 
myriapodous, insectean and thysanurous characters which it pre- 
sents.— Fohn A. Ryder. 
NOTE ON A LARVAL LITHOBIUS-LIKE Myriapop.—I recently met 
with a very small specimen of this type of myriapod with seven 
pairs of legs. The claws are simple, as in the adults, the same as 
I have observed in larval specimens of Fu/us and Trichopetalum, 
and in both adult and immature specimens of Eurypauropus. The 
mouth parts are a miniature of those of the adult. The specimen 
was nearly an eighth of an inch long.— F. A. R. 
TRICHOPETALUM.—I have found Harger’s T. /unatum in great 
abundance in the Philadelphia park, which greatly extends the 
range of this Lysiopetalid myriapod.— F. A. R. 
Dr. CHAPMAN ON THE PLACENTA oF ELepHas.—The birth of an 
elephant at full term (twenty months and twenty days, according 
to the records kept by the keepers at Dr. Chapman’s request), in 
Cooper & Bailey’s menagerie in this city, afforded a unique 
opportunity to study the mature placenta of these huge animals. 
The placenta proper was found to be sonary, and was believed to 
have encircled the foetal elephant during gestation. The amnion 
and chorion formed two large oblong pouches, one within the 
other, and were fused together equatorially at their narrowest 
diameters, the point where the placental villi were developed: 
On either side of the placental zone of villi, the numerous cotyle- 
dons were developed. The placentation was found to be essen- 
tially non-deciduate, and diffuse in character, with a zonary form; 
this combination of characters renders Dr. Chapman’s observa- 
tions of great interest and systematic importance. No naturalist 
of recent times has ever had so good an opportunity to study this 
structure; the specimen described by Professor Owen is sup- 
