SEA-FISHERIES LABORATORY. ' 431 



pyloric region. It is clearly separated in the middle line 

 from the corresponding lobe of the other side. It is broad 

 anteriorly, and becomes narrower and more irregnlar in 

 shape towards the posterior end. The outer part of the 

 broad anterior portion is slightly reflected down the side 

 wall of the fore-gut and comes into contact with the 

 paragastric lobe. 



The Progastric lobe (Fig. 57, p. lb., Text fig. 11, 

 Pro.), is, strictly speaking, part of the Epigastric lobe. 

 It is situated close to the connection between the Main 

 Vesicle and the Epigastric lobe. It is on the inner side 

 of the latter, and is closely applied to the front wall of 

 the stomach. The lobes of each side come into very 

 close contact in the median line, and it is only by very 

 careful dissection that they are seen to be separate. 



The Antero-lateral lobe ["lobe du muscle adducteur," 

 Marchal] (Fig. 57, a. lb., Text fig. 11, a. I. i.) arises from 

 the anterior and outer corner of the Main Vesicle. It 

 consists of two parts: — 



(a) An inner lobe (Text fig. 12, B, a. I. i.), which 

 passes inwards beneath the antennary gland. 



(b) An outer lobe (Text fig. 12, B, a.l.o.), which 

 passes outwards beneath the digestive gland as far as the 

 origin of the outer adductor muscle of the mandible. 



The Cerebral lobe (fig. 57, c. lob.) arises from the 

 anterior and inner corner of the Main Vesicle. It passes 

 inwards above the cerebral ganglia, and almost meets the 

 corresponding lobe of the other side. 



The Hepatic lobe [" arriere vessie " (part), Marchal] 

 (fig. 57, h. lb., Text fig. 11, Hep.) arises from the posterior 

 and outer corner of the Main Vesicle by a very narrow 

 portion, which passes beneath the outer adductor muscle 

 of the mandible close to its insertion on the mandibular 

 apophysis. The main part of the lobe passes outwards 



