1922J 



Branch: Internal Anatomy of Trichoptera 



275 



INDEX TO FIGURES. 



a = anus. 



abg = abdominal ganglia 1 to 8. 



abs = abdominal segment 1 to 9. 



ant = antennal nerve. 



af = alary muscle 1 to 9. 



b = nerve to front of head. 



be = buccal cavity. 



bg = blood gills. 



bm = basement membrane. 



= crura cerebri, 

 or = crop. 



cm = circular muscles. 



cp = corpuscle. 



ct = conducting tubule. 



dep = digestive epithelium. 



dh = drag hooks. 



dv = dorsal vessel. 



ep = epithelium. 



ex = expansion area. 



excm = exterior circular muscle. 



fa=frontal arm. 



fg = frontal ganglion. 



gd = gonad. 



gdl= gonad in inner aspect. 



gd2 = probable ovary of P. interrupta. 



ggl = Gilson's gland. 



glep = glandular epithelium. 



gsp = spinneret of Gilson's gland. 



in = intima. 



1 = Lumen. 



lbl = labral nerve. 

 Ib2 = labral nerve. 

 lb-s = labral sclerite. 

 lil = labial nerve. 

 112 = labial nerve. 

 li-s = labial sclerite. 

 l-int = large intestine. 

 lm = longitudinal muscle. 

 md2 = mandibular nerve. 



md-s = mandibular sclerite. 

 me = me senteron. 

 mp = Malpighian tubule. 

 mpl = dorso-lateral pair. 

 mp2 = lateral pair. 

 mp3 = ventral pair, 

 ms = mesothorax. 

 mstg = mesothoracic ganglion, 

 mt = metathorax. 

 mttg = metathoracic ganglion. 

 n = nucleus, 

 oe = oesophagus. 

 og = opening of gland, 

 opt = optic nerve. 

 oev = oesophageal valve, 

 or = oesophageal ring. 

 p = pigment. 



pm = gills press muscles, 

 pr = proventriculus. 

 pro = prothorax. 

 protg = prothoracic ganglion. 

 . ptm = perotrophic membrane. 

 r = rectum. 



rm = retractile muscle. 

 m = recurrent nerve. 

 rv = rectal valve. 

 rw = rectal wall. 

 s = sympathetic ganglion. 

 sb-oeg = sub-oesophageal ganglion, 

 spr-oeg = supra-oesophageal ganglion. 

 skc = silk gland duct. 

 skp = silk gland proper. 

 sb = striated border. 

 sm-int = small intestine. 

 sp = spinneret. 

 t = tubule. 

 tr = trachea. 

 y = ventral end of ovary. 



