64 SQUALIDE. 



pectoral fin ; the pectoral fins nearly triangular ; the first 

 dorsal fin large; the second small, and placed just in advance 

 of the commencement of the tail ; the inferior lobe of the 

 tail small, the superior portion as long as the head of the 

 fish is wide ; the anal fin is under the second dorsal. 



This species is found in the Mediterranean, on the shores 

 of the various countries of Europe, in the Ocean, and on the 

 coast of Brazil. 



To make this subject as complete as my means will allow, 

 and afford an opportunity of identifying any other species 

 of Zi/gasna that might wander to our shores, I here add, 

 as a vignette, representations of the heads of the other 

 known species, of which No. 1 is Zi/gceiia tudes, Val. the 

 synonymes being, according to M. Valenciennes, Le Squah 

 pantoujlier of Lacepede, t. i. p. 260, pi. VII. fig. 3. Du- 

 hamcl, sect. IX. pt. ii. pi. XXI. fig. 4 to 7. Koma 

 Sora Russel, pi. XII. Tliis species has been found in 

 the Mediterranean, on the coast of Coromandel, and at 

 Cayenne, S. America. 



No. 2. Zygoena Tiburo, Val. syn. Squalus Tihuro, 

 Linn, tom, i. p. 399, sp. 6. Tiburonis species minor, 

 Marcg. 181. Willoughby, tab. B. 9, fig. 3. Klein Misc. 

 Pise. III. p. IS, tab. II. figs. 3, 4. This species has only 

 as yet been met with on the coast of Brazil. 



No. 3. Zygoena Blochii, Cuv. Regne An. t. ii. Bloch, 

 pi. 117. The locality from which this species was obtained 

 is unknown, but specimens are still preserved. 



No. 4. Zygcena laticeps, Cantor. This is a new species 

 lately described and figured by Dr. Theodore Cantor, 

 who obtained it in the Bay of Bengal, and in which the 

 head is still wider than in either of the other known spe- 

 cies ; a straight line drawn from the one eye to the other 

 is equal to about one half of the total length of the fish. 



