104 
W. F. I’UIIOKM,. 
of the ventral longitnclinal muscles. d. v. m. 7-10. Dorso-ventral 
miiscles hehind somites 7-10. dist. Distal side. dors. Dorsal side. 
dors. (led.). Dorsal (originally lateral) side. ec. (j.d. ectodermal j^oi-tion 
of genital duct. ec. t. 8-11. Ectodermal tendons (entai^ophyses, 
apodemes) of the appendages of the 8th-llth somites, end. Endoderm. 
ep. epithelium, f. \,f. 2, etc. First, second pulmonary fuiTOws, etc., in 
the oi'dei' of their formation, (j. Genital cord. (j. o. Genital opening 
into interpulmonary fold (to the outside in fig. 40). (jr. Groove behind 
abdominal apj^endages. h. Horn (procurved end) of pulmonary sac. 
horiz. pi. Horizontal plane of body. hy. Hypoderrnis. luj'. Fibrous 
parts of the hypoderrnis of the ectodermal tendons, inf. Infolding of 
the hypodermis. irdorp. fid. Interpulmonary (eiDigastric) fold or its 
rudiment. 1. Lumen. 1. S 2 nn. m. 10. Lateral muscle to anterior side 
of first spinner (in lOtli somite). /. tr. Lateral trunks of tracheal 
system. lac. Lacuna. led. Lateral side. lb. Lung-book or tissue 
forming it. m. Muscles or tissue forming them. m. sp>in. Inner 
openings of middle pair of sj^inners. m. spin. m. 10. Medial muscle to 
anterior side of first spinner (in 10th somite), m. tr. Medial trunks of 
tracheal system, ma. Matrix cells, ined. Medial side, wicf/.p/. Median 
plane, mes. y.d. Mesodermal part of genital duct. nv. <j. Nervous 
ganglion of the pulmonary somite, op Opening at anterior end of 
abdomen, p. oh. m. 8-11. Posterior oblique muscles of .somites 8-11. 
2 >. S 2 un. Inner ojienings of ijosterior ijaii’ of spinners, pcd. Pedicel. 
2 iost. Posterior side. pr. ax. Principal axis of appendage, proc. 
Proctodaeuni. pidm. 1. Lumen of pulmonary sac. pidm. 2 »'ol. Pul- 
monary proliferation or gi'owing end of pulmonary sac. pulm. s. Pul- 
monary sac. rd. Chitinous thickening on lateral side of tracheal i>edicel. 
•s., s. 1, s. 2, etc. Pulmonary saccule ; first, second saccules, etc., in the 
order of their formation, s'. New chitinous saccule forming before 
the first post-embryonic moult, scy./. 8-11. Segmental tul)es of 8th- 
11th somites, si. Slanting medial part at base of posterior wall of first 
appendage, sp. Spiracle, sp. y. Spinning gland, spi. Anastomosing 
spines, spin.m. lO. Muscles to the anterior side of first pair of spinners. 
sp)z. Si>erma. st.p). Stercoral jmeket. t. Mesodermal tendon (ento- 
chondrite). t. 7-11. Entochondrites at hind ends of the segments of the 
ventral longitudinal muscles of somites 7-11. (t. 8-11.) Indicates the 
position of these tendons, where not drawn in. tr. Tracheal trunk. 
tr. 1. Lumen of tracheal plate or sac. tr. m. Ti-ansverse muscle on 
lateral side of tracheal pedicel, tr. pi. Tracheal plate. tr. 2 Jrol. Tracheal 
proliferation. tr. s. Tracheal sac. tr. tub. Tracheal tubules or finest 
branchlets. v. 1. m. 7-11. Segments of the ventral longitudinal muscles 
in somites 7-11. v. sin. Ventral sinus of abdomen, vc. Vacuole. 
vent. Ventral side. vent. (nied.). Ventral (originally medial) side. 
vest. Vestibule, vit. Vitellophagous cell. u\ Two-celled column, x. 
