364 Notices of Memoirs— Dollo and Storms—Fossil Fishes. 
22 to 26, usually 24, in number; those of the first cycle four to 
six in number, reaching nearly or quite to the centre of the 
corallite, where they are more or less contorted. Those of the 
second cycle do not usually terminate interiorly by free ends, but 
are there joined to one another or to those of the first cycle. 
Those of the third cycle usually terminate like those of the 
second, but are sometimes free at the inner end; the sides and free 
edges of the septa subspinulose or tuberculose. The number of 
corallites in a corallum varies from one to seven or eight, their 
gemmation taking place at the margin of the calice, and usually after 
the original corallite had attained considerable size. 
Diameter of the largest calice observed, 8 millimeters. 
The type specimens! are preserved in the U. S. National Museum, 
at Washington. 
WASHINGTON, June 12th, 1888. 
NOTICES OF MEMOTRS. 
J.—“ Scr tes TéLfostiens pu Rupfiiren.” By L. Dotto and R. 
Storms. (Zool. Anzeiger, No. 279, 1888.) 
\ ESSRS. DOLLO and STORMS have undertaken the investiga- 
i tion of the Fossil Fishes of the Mesozoic and Tertiary deposits 
of Belgium, and we are glad to welcome the first brief instalment 
of the results of their joint researches. The present note deals with 
the systematic position and nomenclature of the genera Sphyrenodus, 
Agassiz, and Scomberodon, P. J. van Beneden. Dictyodus, Owen, 
is adopted as the correct name for the so-called Sphyrenodus, and 
the fish is referred to the Scombride, on account of the characters 
of its dentition, premaxilla, palatine, mandible, and the caudal region 
of the vertebra] column. It is respectively separated from Cybium 
and Pelamys, its nearest allies, by its single series of large conical 
palatine teeth, and by the greater strength of its dentition and pre- 
inaxilla. Scomberodon is considered to be identical with Cybium, and 
the type must henceforth be known as Cybium Dumonti. 
A. S. W. 
II.—Pror. Dr. W. Dames on GiganTicuTHYys PHARAO, (Sitzungsb. 
: Ges. naturf. Freunde Berlin, 1887, p. 187.) 
NHE generic name Titanichthys being preoccupied, Prof. Dames 
suggests that of Gigantichthys for the large Cretaceous fish- 
teeth from Egypt, already described under the name of Titanichthys 
pharao (see Grou. Mag. for April, 1888, p. 157). 
1 Specimens of this Coral have been presented to the British Natural History 
Museum through Dr. G. J. Hinde. 
