90 



XI.— EXPLANATION" OF PLATES. 



liEFEiiEACE Lettering. 



a, b = Direction of the section in 



fig. 52. 

 ab. app. 1-^ = Abdominal api)en- 



abd., !• ^■'' =^'"1 '' = Abdominal seg- 

 ments. 

 a. bib. = Last chamber of heart. 



a. gl. = Acinose gland of ventral 



tube. 

 al. m. — Alary muscle. 

 al. t. = Tendon of alary muscle. 

 an. = Antenna. 

 an' = Anus. 



at. n. = Antennal nerve. 

 b.c. = Blood corpuscles. 



b. cav. = Body cavity. 



b.m. = Basement membrane. 



c. = Inner layer of cuticle, 

 c' = Outer layer of cuticle. 

 car. = Car do. 



cav. — Foramen leading into 



cavity of mandible. 

 ch. = Cliromatin. 

 ch.' = Outer membrane of egg. 

 chb. = Common Chamber. 

 ch. h. = Chromatin body. 

 ch. e. = Torn edge of outer egg 



membrane. 

 circ. m. = Circular muscle fibres 



of oesophagus. 

 chii. = Clypeo-labral rudiment. 

 ch/p. — Ch'peus. 

 c. tn. — Circular muscle fibres of 



mid gut. 

 c. m. b. = Circular muscle l)and.s. 

 c. m. j. = Union of circular 



muscle fibres. 



conn. = Para-oesophagea con- 

 nective. 



conn. '■ ''■ '■' — Connectives of ven- 

 tral nerve cord. 



c.p. — Central mass of protoplasm. 



c. t. j = Connective tissue 



c'. t'. ?«'. i membrane. 



c. t. ?«. = Connective tissue coat 



of mid gut. 

 cut. = Cuticle. 



d. b. — Dark transverse band. 

 d.ep. — Cup-like depression. 

 den' cell. = Deutocerebron. 



dil. an. ni. — Dilator muscles of 



anus. 

 dd. reel. in. = Dilator muscles 



of rectum. 

 div. = Median diverticulum of 



vagina. 

 drc. = Deutocerebrum. 

 d. s. j = Successive stages in 



d.' s.' development of 



d.^ s.'^ ] spermatozoa. 



d. t. — Duct of the acinose gland. 

 dil. = Ductule of salivary gland, 

 ec. = Ectoderm. 

 em. nem. = Nematode embryo. 

 en. = Future endoderm cells. 

 ep. = Epithelium. 

 epcr. = Epicranium. 

 epith. = Fore-gut epitheUum. 

 epith. th. = Epithehal thickening. 

 ex. g. = Excretory granules. 

 exc. or. = Fatty body. 

 gal. = Cialea. 

 g.c. = Ganglion cells, 

 g ' c' = Germ cells. 



