430 



ANATOMY OF VERTEBEATES. 



of the dyodenum of the Eel, for example) of the ordinary tract 

 of the alimentary canal, render unnecessary the presence of a 



pancreas. Thus there is 

 no csecal production of the 

 duodenum in the Ambas- 

 sis. Wolf-fish, Warty Agrio- 

 pe, nor in most Labroids, 

 Cyiirinoids, Lucioids, Silur- 

 oids, nor in the ajDodal Mala- 

 copteri, nor in the Lopho- 

 branchsandPlectognats; nor 

 in the genera Antennarms, 

 MalthcBus, and Batrachus. 

 The pancreas is represented 

 by a single pyloric cascum 

 in the Sandlance and Poly- 

 pterus, fig. 279, h: by two 

 creca in most Labyrinthi- 

 branohs, in many species of 

 Amphiprion, in theLophius, 

 the Turbot, fig. 287, and 

 the Mormyrus, fig. 280, k: 

 by three creca in the Perch, 

 the percoid Popes (Acerina), the Asprodes, and Diploprions : of 

 from four to nine cteca in the genus Cottus : of from five to nine 



cajca in the genus Trinla : 



28s 



of six cfeca and upwards in 

 Scorpcena and Holocentrum : 

 of nine creca in the Sprat, 

 fig. 288 : and so on, increas- 

 ing to a numerous group of 

 pendent pyloric j^ouches, as 

 we find in the Scomberoids, 

 Chaitodonts, Gadoids, fig. 

 285, Halecoids, fig. 286, 

 Cyclopterus, and Lepidos- 

 teus. There is a difference, 

 however, worthy of note, in 

 the mode and extent of at- 

 tachment of these numerous 

 ca3ca: in the Salmon, fig. 286, Herring, fig. 281, (/, Sprat, fig. 

 288, and Haddock, they rank almost in a line along the whole 

 duodenum : in the Gymnotus, Lump-fish, and Whiting, fig. 



Pyloric coeca of the Turbot {liliornhus maximns). ccxxxi. 



Pyloric cEcca of tlio Sprnt iClupcii, sprattii-i) 



