310 . -Miscellaneous. 
onus in internal organization, but differs so much from the Brachi- 
onea, and, indeed, from all Rotatoria, in the structure of its foot, 
that the author regards it as the type of a new genus. 
Genus ASPLANCHNA, Gosse. 
Asplanchna triophthalma, un. sp. 
Corpus truncato-ovatum ; ocellis tribus, duobus marginalibus, uno 
majore collari; organo rotatorio simplice, parum undulato; fronte 
organis tentaculatis; pede anoque caret. Long. corp. 0°8-1:2 
mill. 
This is also found abundantly in the froth of the surface of the 
great pool near Mezo-Zah. It is one of the largest of Rotifera, and 
very similar to Asplanchna Sieboldii (Notommata Siboldii, Leyd.) in 
the form of the body, the digestive apparatus, and the ovary. But 
the nervous system, the aquiferous vessels, and the construction of 
the rotatory organ show such considerable differences that the author 
has no hesitation about separating the two species, and he gives the 
new one the name of Asplanchna triophthalma, because besides the 
frontal eye, seated upon the cesophageal ganglion, it possesses two 
other smaller eyes placed at a distance from the ganglion and pro- 
vided with visual nerves. The male of Asplanchna Sieboldii pos- 
sesses on each side of its body a triangular process; but no such 
appendages occur in the male of the new species.—Math. naturwiss. 
Berichte aus Ungarn, Bd, i. p. 261, 
On the Develoz ment of the Comatule. By M. E. Prrrirr. 
To arrive at a strict determination of the different parts which 
constitute an adult Comaiula we have endeavoured to ascertain, by 
means of materials kindly furnished to us by Dr. Viguier, of Algiers, 
what is the organization of the animal at the three phases:—1, of 
Cystidean ; 2, of Pentacrinus; 3, of free Comatula, but not yet 
adult. 
1, At the close of the Cystidean phase the young Comatula still 
possesses only buceal tentacles and no arms. Its digestive tube forms 
a half spiral, and presents an anus situated upon the side of the 
body. Around the mouth there is an annular canal into which the 
buccal tentacles open. A short tube, bent into a V, starts from the 
annular canal, traverses the wall of the body, at the same time 
slightly changing its structure, and becoming united with the sur- 
rounding tissues, and then opens exteriorly by a pore situated upon 
the wall of the body. This tube has been compared with the hydro- 
phorous canal of the Holothuriz, which is itself regarded as homo- 
logous with what is called the sand-canal in the Sea-urchins, 
Starfishes, and Ophiurans. It serves indubitably to introduce water 
into the tentacular apparatus ; but we must make the most express 
