56 NATURAL HISTORY. [n. ZOOL. GAL. 
myzidce ), whose skeleton is the most imperfect of all the 
vertebrated animals. Their body is long, slender, and 
cylindrical, ending in a circular mouth, and destitute of 
pectoral and ventral fins. The true Lamprey (Petromyzon) 
has seven branchial openings, whence their vulgar name 
Seven Eyes, and the skin under the tail forms a kind of 
fin. Their mouth is armed with teeth. 
The Gastrobranchus ( Gastrobranchus ) differs from the 
Lamprey, by the tongue only being armed with teeth, like 
the Lobworms. These animals emit such a quantity of 
mucus through the pores of the lateral lines, that it con¬ 
verts the water in which it is placed into a jelly. 
Cases No. 9—23 contain Fishes preserved in spirits. 
The Table Case in the centre of the room contains 
a collection of dried fishes, arranged as those in the Wall 
Cases. 
On the Walls over the Cases round the Room, 
are placed a series of the horns of mammalia belonging to 
the family Bovidse. Amongst them are 
The Arnee (Bos Arne ) of India; the African Buffalo; 
the Gour (Bos Gonr ) of India; the Musk Ox (Bos mos - 
chatus ), and some Horns of domestic cattle. Amongst the 
latter is a pair of horns of the African Ox of very large 
size, but exceedingly light, the core being very cellular; 
the Ibex (Capra Ibex), from Egypt; the Wild Goat; 
the Jemlah Goat; varieties of Sheep, especially the Four 
Horned Sheep : the Koba ( Antilope Senegalensis ), from 
the interior of Africa ; the Gazelle (Antilope Dorcas ) ; 
Indian Antelope (Antilope Cervicapra); Saiga (Antilope 
Saiga); Impoofo; Caffrarian Oryx; Roan Antelope ; Blue¬ 
faced Antelope; W'hite-faced Antelope, &c. 
Between the Windows are the Spike of a large Saw- 
Fish, and a large Rhinobate, from India; and, on the 
sides of the Door, a Sh?rk, and a large specimen of a 
Torpedo, found on the coast of England. 
Over the Cases 9—12, on the right hand of the fire¬ 
place, is a fine specimen of the Tetrapturus Herschellii, 
Gray, from the Cape of Good Hope. The Tetrapturi 
differ from the Common Sword Fish (Xiphias) by having 
ventral fins, and two small crests, parallel to one another, 
on each side of the tail; whilst the Xiphiae have no ventral 
fin, and only one caudal crest. 
