195 



EXPLANATION OF PLATES. 

 REFERENCE LETTERS. 



a. ace. Anterior accessory muscle of the scaphognathite. 



a. ar<. Antennary artery. 



ab. 1 0. Abdominal somites 1 to 6. 



nbd. Abdomen. 



abs. Lines of absorption. 



a. ex. B. Tendon of the anterior extensor of basi-ischium of chela. 



af. Afferent branchial sinus. 



af. 1. Do. of the podobranch of the second thoracic somite. 



af. 2. Do. of the arthrobranch of the second thoracic somite. 



af. 3. Do. of the podobranch of the third thoracic somite. 



af. 4. Do. of the anterior arthrobranch of the third thoracic somite. 



af. 5. Do. of the posterior arthrobranch of the third thoracic somite. 



af. 6. Do. of the anterior arthrobranch of the fourth thoracic somite. 



af. 1. IV. of the posterior arthrobranch of the fourth thoracic somite. 



af. 8. Do. of the pleurobranch of the fifth thoracic somite. 



af. 9. Do. of the sixth thoracic somite. 



a. f. ft. Anterior flexor of the flabellum of the first maxillipede. 



a. gl. Antennary gland. 



a. i. p. Antero-inferior pyloric ossicle. 



a. Ib. Antero-lateral lobe of the bladder. 



a. mes. Anterior mesopyloric ossicle. 



amp. Pyloric ampulla. 



amp. C. Supra-ampullary ridge. 



a 1 , n. Nerve of the first antenna: a-, n. Nerve of the second antenna. 



ant. Second antenna : ant''- First antenna (antennule). 



a. oe. Ib. Anterior oesophageal lobe of the bladder. 



ao. Ib. Outer portion of the antero-lateral lobe of the bladder. 



a. ost. Anterior ostia of the heart. 



a. pi. Anterior pleuropyloric ossicle. 



apoph. Apophysis of the mandible. 



art. 1 etc. Branches of the sternal artery supplying the fir.st and 



following post-oral cephalothoracic appendages. 

 a. s. Antero-superior dilator muscles of the fore-gut. 

 a. s. a. Anterior supra-ampullary ossicle. 

 as. Ib. Anterior oesophageal lobe of the bladder. 



a. t. 1. Lateral accessory tooth. 



JS.^Basipodite. 



be. 1 5. Branchio-cardiac veins 1 to 5. 



B-I. Basi-ischiopodite. 



bl. Bladder. 



b. m. Basement membrane. 

 br. Gills. 



br. ch. Branchial chamber. 



br. e. Branchial excretory organ. 



br. s. 1 5. Branchial sinuses 1 to 5. 



C. Coxopodite. 

 C 1 . Carpopodite. 

 cacc. Mid-gut caecum. 



c. al. Antero-lateral cardiac muscles. 

 c. ant. Anterior cardiac muscles. 

 card. Cardiac portion of the fore-gut. 



cd. 1. Dorsal antero-lateral muscles of the heart. 

 cd. 2. Ventral antero-lateral muscles of the heart. 



