562 
COELENTEEATA. 
Siphonophora observed at Trieste ; the richest harvest is made in the 
winter, the poorest in the summer months. 
The characters of the Thecomeduson [Zool. Rec. xi. p. 629] are given by 
Allman (2) thus ; “Animal composite, zooids medusiform, with circular 
and radiating canals, and included in a chitinous rooted perisac, which 
forms thecae, within which they are retractile.” And of the genus 
Stephanoscyphus : “ Terminal orifice surrounded by a single circlet of 
simple filiform contractile tentacula ; 4 longitudinal canals ; velum and 
manubrium undeveloped ; generative elements formed in the walls of the 
longitudinal canals P” The presence of 4 (8) septa in the lower part 
of the hydrotheca may also be noticed. 
Geaptolithes. 
H. A. Nicholson : On a new genus and some new species of Grapto- 
lites from the Skiddaw Slates (Ann. N. H. 4, xvi. pp. 269-273). J. 
Hopkinson : On some Graptolites from the upper Arenig rocks of 
Ramsey Island, St. David’s (P. Liverp. Geol. Soc. 1873-74, p. 47). J. 
Hopkinson & 0. Lapworth : Descriptions of the Graptolites of the 
Arenig and Llandeilo rocks of St. David’s (J. G. Soc, xxxi. pp. 631-672, 
pis. xxxiii.-xxxvii.) [Clematograptus^ g. n.]. C. Lapworth : Note on 
the Graptolites found at Habbie’s Howe, Logan Burn (Tr. Geol. Soc. 
Edinb. ii. p. 375). F. McCoy : Geological Survey of Victoria ; Prp- 
dromus of the Palaeontology of Victoria, Dec. 1 (Melbourne : 1874). 
G. Stache : Die Graptolithen- Schiefer am Osternig Berge in Karnten 
(JB. geol. Reichsanst, xxiii. p. 175). 
