180 Canadian Record of Science. 
Ulrich, of Newport, Ky., U.S.A., whilst an obscure form 
allied to Arthronema occurs in certain shaly strata of 
Rideau Ward, Ottawa. ‘The GRAPTOLITES are eminently 
characteristic of the Utica. The most common species is 
the Orthograptus quadrimucronatus, Hall, which is found 
almost invariably in all collections of the Utica. Then 
Leptograptus flaccidus comes next. With the graceful and 
slender curving stipes of the polypary the surfaces of 
many slabs of Utica shale are literally covered. Another 
species of this genus, Lept. annectans, Walcott, has been 
found in one or two localities. The genus Climacograptus 
has also one representative at least, and that a form closely 
related to C. Scharenbergi, Lapworth, or C. teretiusculus, 
Hisinger. Considerable difficulty has been met in identify- 
ing this Climacograptus, and especially on account of the 
fact that the earlier types and descriptions in many in- 
stances included several forms quite separate and distinct in 
structure, whose affinities have yet to be discussed and 
characters ascertained. Several small specimens of a 
diprionidian graptolite occurs abundantly in the Utica 
shales of Collingwood, Whitby, Ottawa, Montreal, &c., and 
is usually referred to the ubiquitous Diplograptus pristis, 
Hisinger. Reteograptus (?) Hucharis, Hall, another curious 
and interesting form, whose relations and affinities are still 
obscure, has been met with at Montreal in the Utica of St. 
Helen’s Island, and resembling closely the forms from the 
typical locality Lake St. John basin. 
The obscure parasitic hydroid ? Sagenella ambiqua, 
Walcott, has been detected on the shells of several ortho- 
ceratites, but the identification of this form is very 
dubious. 
Referring to parasites, a small Cornulites, C. immaturum, 
Hall, has also been found in the Utica of Montreal by Mr. 
Thos. Curry amongst the débris hauled up from the bottom 
of the harbour whilst the excavations were going on for the 
28-foot channel. The material there obtained has kindly 
been placed at my disposal by Sir William Dawson, and 
amongst the forms detected the last mentioned proved to be 
a ‘ 
