FAMILY SPHM#ROMIDAI. 79 
as could be ascertained with transmitted light the number of 
young is very low—about eight; one of them was removed and 
proved to be large. 
Of the section Monolistrini Vireia berica (Fabiam) has 
been examined. The marsupial lamelle are very large, but 
not quite as large as in Dynamene; the brood is formed in 
the marsupium itself; the eggs are very large, the young 
nearly ready for birth exceedingly large, and their number 
very low. The genera Monolistra (Gerst.) and Coecosphe- 
roma (Dollf.) are so closely allied to Vireia that their propa- 
gation is in all probability completely as in the latter genus. 
Of the section Ancinini, Ancinella profunda (n. gen., n. sp.) 
has been studied ; the structure is nearly asin Cymodocella. 
An enormous external pouch occupies the lower side of the 
four posterior thoracic segments; its aperture, which is 
directed forward, is as broad as the marsupium, and its front 
end is near the posterior margin of third segment. ‘The 
space of this pouch is somewhat larger than that occupied by 
the brood in the marsupium itself. The marsupial lamelle 
not only overlap each other very considerably, but also cover 
about the front half of the wall of the pouch. In one female 
I found fourteen, in another eleven large oblong eggs. 
Of the section Cassidinini I have seen two females with 
brood and three adult females without brood of Cassidini- 
dea ovalis (Say), besides one specimen with brood of a new 
species of Leptospheroma (Hilg.) The structure met with 
in these forms differs in the most astonishing degree from 
that observed in any other section, but as it is very difficult 
to understand and the animals very small my material is in- 
sufficient, and I can make out only a part of the features. 
With transmitted light it is easily seen that the specimen 
of Leptospheroma has eight oblong somewhat curved eggs 
(or rather half-developed young) apparently enclosed in a 
marsupium, which occupies almost the whole area between 
the thoracic legs, but is slightly vaulted and not visible from 
the side, because the lower side of the animal is rather con- 
cave ; in Cassidinidea the “‘ marsupium” is somewhat more 
