SIGNIFICANCE OF REFERENCE LETTERS. 



a. ep. — 



a.f. 



am. cy. — 



arch. s. — 



bd. — 



bd. w. — 



bl. — 



bl. cap. — 



bl. m. — 



bl. s. — 



bl. V. — 



br. — 



bu. c. — 



cal. — 



cal. div. — 



cal. gl. — 



cap. — 

 caud. reg. — 



caud. 2. — 



c. b. c. — 



c. c. — 



cen. c. — 



c. ep. — 

 chant. sex. gl. 



chlo. — 



cl. c. — 



cl. gl. — 



clit. — 



cht. c. — 



c. m. — 



CO. bu. — 



cce. — 



coec. — 



coel. ep. — 



con. t. c. — 



CO. p. — 



cp. - 



c.p. - 



c.p. - 



cr. — 



epithelium in the an- 

 terior part of the 

 somite. 



anterior fold of ne- 

 phridia. 



amoebocytic chlorago- 

 gen cells. 



archosomal structures 

 body-wall, 

 body-wall, 

 blood-sinus, 

 capillaries. 



membrane of blood- 

 sinus. 



blood-sinus, 

 blood-vessel, 

 brain. 



copulatory bursa, 

 calcic concretions, 

 calciferous diverticle. 

 calciferous glands, 

 capillaries, 

 caudal region, 

 caudal zone, 

 cushion copulatory 

 bursa. 



copulatory cushion, 

 central cell, 

 ciliated epithelial cells. 

 — discharge chamber 

 of sexual glands, 

 chloragogen cells, 

 clitellar cells, 

 clitellar glands, 

 clitellum. 

 clitellar cells, 

 circular muscles, 

 copulatory bursa, 

 ccecum. 



coecal pouch of ne- 

 phridium. 



coelomic epithelium, 

 connective tissue cells 

 copulatory papilla, 

 capillaries, 

 copulatory cushion, 

 copulatory papilla, 

 circular muscles. 



L2561 



