SEA-FISHERIES LAB0RAT0R1 . 405 



course of the lateral artery and its branches small arteries 

 are given off which supply the hypodermis. 



The Ovarian [or Spermatic] Branch (ov. a.). This 

 follows the course of the gonads, and sweeps round near 

 to the outer edge of the carapace. Numerous branches 

 are given off to the gonads and also to the hypodermis. 



The Antennary Branch [a. art.). This passes 

 anteriorly and dips downward as it sweeps around the 

 fore-gut. It passes over the paragastric lobe of the 

 bladder and divides into an outer and an inner portion. 

 The outer branch dips downward and outward and gives 

 branches to the external adductor muscle of the mandible. 

 It then passes outward to the hypodermis and supplies 

 also the hepatic lobe of the bladder. The inner branch 

 passes inward and supplies the antennae and the front 

 part of the head. It also sends branches to the anterior 

 gastric muscles and to the main vesicle and the para- 

 gastric and oesophageal lobes of the bladder. 



Hepatic artery (PI. VIII, fig. 51, h. art.). Owing to 

 the fact that this artery dips down immediately on leaving 

 the heart, and becomes deeply embedded in the digestive 

 gland, it is rather difficult to locate. Hence several workers 

 at the Brachyura have neither figured nor described this 

 artery, and some have described other arteries as the 

 hepatic artery. Milne-Edwards,* in his description of 

 Maia, has designated as the hepatic artery those branches 

 of the sternal artery which supply the digestive gland. 

 Brooksf has called the lateral (ophthalmic) artery by the 

 name of hepatic artery. 



The hepatic artery of each side arises from thf 

 ventral side of the anterior region of the heart, its origin 

 being beneath and slightly external to that of the lateral 



* Milne-Edwards. Hist. Nat. des Crustaces. 

 t Brooks. Handbook of Invertebrate Zoology. 



