S4 Dr. H. Fol on the Family Tintinnodea. 
Genus III. Dicryocysra, Ehrbg. 
Test formed of two lamelle with septa as in Cyttarocylis, 
but also presenting true apertures ; fenestree wider than the 
internal cells of the test. 
Dictyocysta templum, Hick. (Pl. IV. fig. 9.) 
I think I can identify the species I met with at Villafranca 
with that of which Hiickel has given a figure, notwithstanding 
the more rounded form of the apex of the test, and notwith- 
standing some differences attributable to errors of drawing. 
The test in structure much resembles those of the genus 
Cyttarocylis, except that the large fenestrae of the margin and 
those placed around the widest part of the test are really per- 
forated. I ascertained this fact by placing the test in a drop 
of glycerine charged with suspended particles, and causing 
the liquid to flow by means of pressure upon the covering- 
glass. I then saw the particles pass through the fenestree, 
while the experiment has always given me negative results 
in the case of the large cells of the test of Cyttarocylis. 
The animal seemed to me to differ very little from that of 
the latter genus. 
This species, the only one of the genus that I have found 
at Villafranca, only occurred in small numbers. 
Genus IV. CopoNELLA, Hiick. 
( Coniocylis, mihi.) 
I think I am now sure of the identity of one of the species 
that I have described under the name of Conzocylis with one 
ot Hickel’s Codonelle. The diagnosis of the latter, itis true, 
is defective, since it is based upon a misunderstood character, 
which, moreover, is common to the rest ot the Tintinnodea. 
Nevertheless I prefer to retain the name proposed by the 
above-named author, since that name has the advantage of 
priority. The following is the new diagnosis of this genus :— 
Test formed of a single lamina, uneven, embossed or striate, 
agelutinant, more or less incrusted with foreign bodies. Ani- 
mal furnished at the peristome with narrow undulatory 
lamella, and possessing two nuclei. 
Codonella campanula, (Pl. IV. fig. 11.) 
( Tintinnus campanula, Ehrbg.; T. campanula, Clap. & Lachm.; Codo- 
nella campanella, Hack. ; Contocylis campanula, mihi.) 
I think I may identify this species with the one figured 
