The Cluthas only lasted another 4 years after the above article was published.
They were withdrawn in 1903 when the electric tramway service along both sides of the Clyde made the little steamers unnecessary.
From the old maps there seems to have been 11 ferry crossings on the river, although not all operated at the same time. The above article refers to 7 crossings in 1899. The Hyde Park Ferry did not seem to be still in operation by the end of the century. Other ferries, further downstream, came later as the riverside was developed.
Going downsteam from east to west the ferries were:
York Street Ferry (York Street to West Street)
Clyde Street Ferry (Clyde Street, Anderston, to Springfield Quay)
Hyde Park Ferry (Hydepark Street to Springfield Quay)
Stobcross Ferry (Finnieston Quay to Mavisbank Quay)
Finnieston Ferry (Finnieston Quay to Mavisbank Quay)
Kelvinhaugh Ferry (Yorkhill Quay to Princes Dock)
Govan Ferry (Ferry Road, Partick, to Water Row, Govan)
Meadowside Ferry (Meadowside Street, Partick to Holm Street, Govan)
Whiteinch Ferry (James Street, Whiteinch to Holmfauld Road, Linthouse)
Renfrew Ferry (Yoker to Renfrew)
Erskine Ferry (Dunbartonshire to Renfrewshire)
The Finnieston vehicular ferry and the Stobcross Ferry appear to have had adjacent landing points at Finnieston Quay beside the north rotunda.
The “Glasgow Story” website has a nice photograph of both ferries and their northern landing points.
http://www.theglasgowstory.com/imageview.php?inum=TGSA02545