206 MB. A. D. MICHAEL ON AN [Mar. 5, 



dg. Dermal glands. 



dq. Ducts from the quadrate salivary glaud. 



dr. Ducts from the reniform salivary gland. 



du. Ducts believed to lead from a small fourth gland. 



E. Excretory organ. 

 ec, Ectostracum. 



ep. Epiostracum. 



ex. Excretory (urinary) white matter. 



F. Fat-cells. 



fff. Food-globules absorbed and lying within the cells of the ventriculus, 



G. Ganglion. 



ga. Genital aperture of cJ • 



gp. Genital plates. 



gs. Genital suckers (so-called). 



gso. Supra-oesophageal ganglion (upper part of brain). 

 gsu. Sub-oesophageal ganglion (under part of brain). 



gu. Gland of unknown function. 



H. Hypoderm (endostracum). 



L. Ligament which attaches the sigmoid piece to the chitinous bridge (B.). 



M. Muscles seen in transverse section. 



ma. Lower distensor muscles of pharynx. 



mb. Membrane (basal) of genital suckers. 



mc. Constrictor muscles of penial canal. 



md. Mandibles. 



mdp. Membranous projection from dorsal edge of mandible. 

 mdr. Retractor muscles of mandibles. 

 mdt. Tendon of retractor muscles of mandible. 



me. Dorso-ventral muscles. 

 mdii. Terminal claw-like joint of mandibles. 



ml. Maxillary lip. 

 mlm. Levator muscles of mandible. 



mlp. Levator muscles of the roof of the phai-ynx (dilatores pharyngis). 

 mop. Occlusor (constrictor) muscles of pharynx. 



mu. Levator muscles of terminal joint (claw) of mandible. 

 N. Nuclei. 



n 1. Nerve to 1st leg. 



n 2. Nerve to 2nd leg. 



n 3. Nerve to 3rd leg. 



n 4. Nerve to 4th leg. 



na. The branch of the nerves serving the first and second legs, which is the 

 homologue of the accessory nerve of Croneberg, Schaub, Nalepa, &c. 



ng. Genital nerve. 



nm,. Mandibular nerve. 

 no. Optic nerve. 



np. Palpal nerve. 

 np 1. Palpal branch of same. 

 np 2. Branch of same to maxillary lip. 



npk. Pharyngeal nerve. 

 nr. Recurrent nerve. 

 nil. Nerve of unknown function. 



nv. Nerve to muscles running from the dorso-vertex to the maxillary lip. 

 ob. Bulb of the eye. 



00. Cornea of the eye. 

 (B. Esophagus. 



01. Lens of the eye. 



op. Pigmental lines (or rods) in the bulb. 



P. Palpus. 

 pc. Penial canal. 

 ph. Pharynx. 

 pr. Roof of pharynx. 

 ps. Protecting hair of the outlet of one of the derm al glands. 



iS. Stigma. 



