100 MoZZ. 
MOLLUSCOIDEA. 
Goodsiria coccinea, g. & sp. nn., Cunningham, Tr. L. S. xxvii. [1871] 
p. 489, pi. Iviii. fig. 3, Straits of Magellan. 
Lucr^. 
L. Joliet remarks upon the nervous and colonial nervous system of 
Pyrosoma giganteum ; with regard to the development, he states that the 
four ascidiozooids near the closed extremity of the colony cannot be the 
four primitive individuals, these being pushed forwards by the whole of 
their progeny ; he comes to the conclusion that the elseoblast acts as a 
reserve for the young animal at the time when nutrition has not com- 
menced or is insufficient, and he compares the agamic Salpa with the 
Cyathozoid, the sexual Salpa with the sexual Pyrosoma ; the whole differ- 
ence is, that the sexual Pyrosoma produces by gemmation other indi- 
viduals, which are similar to itself. As to the gemmation, he comes to 
the conclusion that the bud originally consists of three layers, originating 
from the parent individual, that the sexual elements are contained in 
the middle layer, and that the participation of the sexual organs in the 
gemmation is reduced to the extension of this middle layer into the bud. 
C. R. xcii. pp. 473-475 & 1013-1015, also Ann. N. H. (5) vii. pp. 492 & 493. 
The peribranchial spaces or lateral atria of Pyrosoma are produced by 
the mesoderm, according to observations in sufficiently young buds ; id, 
I. c. pp. 473-475, abstract in J. R. Micr. Soc. (2) i. p. 438. 
SALPiE. 
J. Barrois has observed the development of Salpa maxima^ and states 
that three parts are concerned in the formation of the embryo and its 
appendages, of which two (the follicle and an expansion of the wall of 
the branchial sac) are developed from the mother, and the third is formed 
from the egg ; he compares the two former parts with two incubatory 
pouches and the maternal placenta, the third with the allantois of the 
Mammalia. He also comes to the conclusion that the different species of 
Salpa exhibit remarkable differences in their embryogeny, which will 
accouift for the different statements given by Salensky and Todaro. 
J. de I’Anat. Phys. xvii. pp. 455-498, 2 pis. ; abstract in J. R. Micr. Soc. 
(2) ii. pp. 182 & 183. 
W. Salensky gives a preliminary account of his new researches into 
the embryonal development of Salpa. Having observed it in several 
species, he comes to the result that it exhibits very remarkable differences 
in different species, and that the discrepancies between his own former 
observations and those of Todaro may be caused by the circumstance that 
each has observed different species. He considers the development of 
Salpa as a peculiar sort of gemmation, which he terms follicular. Zool. 
Anz. iv. pp. 697-603 & 613-618 ; abstract in J. R. Micr. Soc. (2) ii. 
pp. 32 & 33. 
Cyclomyaria. 
B. Ulianin gives preliminary notes on the development of Doliolum^ 
