268 . TRANSACTIONS OF THE -[may 20, 
it is the basis of the references of this fossil by Lapworth, Brog- 
ger and Hermann to the Olenus beds. or to the highest part of 
the same, and thus older than the Dictyonema beds. Moberg 
explains that when Linnarsson referred C. tenellus to the upper- 
most part of the Olenus Zone he had not yet set off the Dictyo- 
nema bed from that zone, and that the species cannot now any 
longer be considered as belonging to that zone. He sums 
up his argument with the following conclusions: 
(1) No piece of shale with C. tenellus contains any Sphero- 
phthalmus. 
(2) Spherophthalmus notwithstanding occurs even here in a 
layer, which immediately borders on the Dictyograptus shale. 
(8) At no place except at Hunneberg as any C. tenellus been 
found in the uppermost part of the Olenus Beds, and this bed is 
only known from a loose piece. 
(4) On the contrary graptolites of the type of C. tenellus and 
those occurring with it, have been found in most places in the 
layer which lies closest above the Dictyograptus Beds. 
(5) Dictyograptus flabelleformis shale—when new represen- 
tatives of the genera Clonograptus and Bryograptus occur, both 
close above and close beneath (namely at Hunneberg), but not 
together with the above named species—by its appearance af- 
fords an intelligible explanation of the gap in the continuous 
development of the other graptolitic genera. 
Moberg, however, appears to think that there is some mistake 
in regarding C. tenellus as in any case older than the Dictyo- 
nema Zone, for he interested Herr G. von Schmalensee to col- 
lect material for him bearing on this question, and quotes his 
account of the geological position of the species at Hunneberg, 
namely, that the shales there which contain C. tenellus plainly 
overlie the Dictyograptus shale, and only come in contact with 
the Olenus shale in places where the Dictyograptus shale has 
been wedged out. 
If we depend upon these researches of Herrn Moberg and von 
Schmalensee, the little graptolite found by Linnarsson belongs 
properly above the Dictyonema beds. It will therefore be of 
interest to geologists to know that the genus as represented in 
Clonograptus proximatus existed at St. John with Dictyonema. 
BRYOGRAPTUS, Lapworth. 
BryoGRAPTUS PATENS, Matt. Pl. XLVIIL., figs, 4 a to e. 
Nat. Hist. Soc. N. B. Bull. x., p. xi. 
Trans. Roy. Soc. Can., vol. x., sec. iv., p. 17, pl. vii., figs. 1 a-d. 
Primary branches of the hydrosome spreading, at first dicho- 
