bpongij:. 
20 Spong. 
common both to the Red Se$ and the East African Sea region are either 
cosmopolitan or spread over the whole Indian Ocean. The Red Sea fauna 
is more related to the Australian than to the Indian marine regions, per- 
haps only because the former is better investigated. Only cosmopolitan 
forms are common to the Red Sea and Mediterranean. The Suez Canal 
docs not appear to alter the conditions quickly. Two species are evidently 
in the act of migrating, and have each reached the middle of the canal ; 
but now their migration appears to have come to a stop. 
Red Sea ; Topsent (3). 
Madagascar ( Spongillidm ) ; Yceltzkow. 
Indian Ocean and Bay of Bengal ; Wood-Mason & Alcock (1, 2). 
Indian Archipelago (Sjwngillidcn) ; Weber. 
Victoria ( Homocoda ) ; Dendy (4). Mostly from near Port Phillip 
Heads. 
B.— GEOLOGICAL. 
Laurentian of St. John, New Brunswick (2 Sponges) ; Matthew (2). 
Lower Cambrian (Oleuellus Zone) ; Walcott. 
Cambrian of Sardinia (Palceospongia prisca) ; Bornemann. 
Cambrian of Acadia ; Matthews (1). 
Ordovician, Ottawa (a new Sponge) ; Hinde (1). 
Siluro-Cambrian of Little Metis, Lower St. Lawrence ; Dawson. 
Cincinnati Group, Cincinnati and Kentucky ; James. 
Devonian of Bohemia ; Katzek. 
Devonian of Mackenzie River Basin (1 Sponge, Astrccosjgongia hamilton- 
ensis, Meek & Worthen) ; Whiteaves. 
Upper Callovian, Grojec ; Wisniowski. 
Jura and Cretaceous of Mexico (1 Sponge) ; Felix. 
Valangian of Chambotte (2 Sponges) ; Pillet. 
Cretaceous of Upper Bavaria ; BOhm. 
Pyropen Sands of the Teplitz and Priesen Layers ; Jaiin. 
Cretaceous of the basins of the Don and the left affluents of the 
Dnieper ; PlATNITZKY. 
Cuvieri-Planer of Paderborn ; Pocta. 
Cherty Siliceous Rock, S. Australia (indetermined Sponge spicules) ; 
II IN HE (2). 
UNSYSTEMATIC AND CLASSIFICATORY. 
1. CALCAREA. 
Von Lendenfeld (1, 3) gives the following classification of the 
Calcar ea : — 
Order Ilomocoda . 
Family 1. Asconidce (pp. 193 & 425). 
Genera Ascetta , Ascandra ) Ascyssa. 
