262 QUARTERLY CHRONICLE. 
addition to these, a new Lugena, having an acerose surface 
and spiral ornament round the neck, had been found, which 
he proposed to call L. Jeffreysii. A specimen of Lagena 
crenata, P. and J., hitherto only known as a Tertiary fossil, 
and L. gracillima, Seguenza, which could scarcely be said to 
have been recorded from a British locality, were noticed, and 
three other species, viz., Hauerina compressa, VOrb., Cristel- 
laria cultrata, Mont., and Marginulina Raphanus, Linn. 
The distribution of the different families of the Rhizopoda 
in the area dredged was found to be as follows :—Of the 
twenty-one species of Miliolida inhabiting the British seas, 
eighteen were obtained, and the whole of the six species of 
Lituolida were found most of them in considerable abundance 
Of the Lagenida 2*, of the Globigerinida 23, and of the 
Nummulinida =, had been noticed, but it was probable that 
further search would increase these numbers. 
“On the Systematic Characters of the Echinoidea Regularia,” 
by C. Stewart.— The author of this, a very valuable and 
suggestive paper, dwelt on the importance of the minute 
structure of the hard parts of the Echinoidea as bases of 
classification. He particularly drew attention to a series of 
calcareous spicules, entirely new, discovered by himself, 
scattered in the alimentary canal, and highly characteristic 
of the different genera and species. 
“On the Asexual Reproduction and Anatomy of Cheto- 
gaster vermicularis, Mill,” by E. Ray Lankester, of Christ- 
church, Oxford. The fissiparous propagation of this minute 
worm, which lives on water-snails, was minutely described, 
and shown to present some peculiarities in regard to the 
relation between parent stock and zooids. The anatomy and 
general morphology of the worm had never been before dis- 
cussed. The chief points of interest were—lst. The exceed- 
ingly small number of segments composing an individual 
(four or five). 2nd. The remarkable degree of cephalization, 
the cephalic bristles differing from the rest possessed by the 
worm, and being connected with the mouth, separated by a 
wide gap from the succeeding bundles. 3rd. The total 
absence of cilia in the animal. 4th. The presence of stiff 
sensory (?) hairs on the cuticula. 5th. The absence of 
marked segmentation. 6th. The non-occurrence of any 
individuals bearing sexual organs. Prof. Huxley considered 
Chetogaster a larval form, and suggested a comparison with 
Sagitta. 
a Te 6 
+ NE A 
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~~) 
