. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). \m 1^ VKUTKltliA TK MOIU'I/OLOd Pig. 108.—Diagram of THK EXOUKTOKY Uk- rKOUl'CTlVK AM) NkK- VOIS SySI"KM8 ov Ilii'udo ^ufler Hoi'KNK). K)od-ve!«el. « = ncphridia. ot = t>var\. pe = penis. k = testis. masses. Six of these MiwroMi'lUt) it is tlirown into tliioo loii^itiuliiuil iiMisciilHr rid^i^s whoso etlg(*s inay hecoinn coiiverttul into oliitin, thus ftniuiii^' t«M>th. Sulivuiy ghinils optui into tlu> phurynx in sonio forms. Th*^ hiig«< stomach int
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). \m 1^ VKUTKltliA TK MOIU'I/OLOd Pig. 108.—Diagram of THK EXOUKTOKY Uk- rKOUl'CTlVK AM) NkK- VOIS SySI"KM8 ov Ilii'udo ^ufler Hoi'KNK). K)od-ve!«el. « = ncphridia. ot = t>var\. pe = penis. k = testis. masses. Six of these MiwroMi'lUt) it is tlirown into tliioo loii^itiuliiuil iiMisciilHr rid^i^s whoso etlg(*s inay hecoinn coiiverttul into oliitin, thus ftniuiii^' t«M>th. Sulivuiy ghinils optui into tlu> phurynx in sonio forms. Th*^ hiig«< stomach into whioii the pharynx opens heiiin«l gives otf a nuniher of lateral pouehes (elt^vtui j)airs in IIini<f, seven in ClcfMiiH-), sonu^times hranehed and increasing in size from befort* backwards, the niost posterior pair being usually quite long and dinu'ted backwards })arallel to the straight narrow intestine wiiich i)pens to the exterior on the surface of the body, just anterior to the posterior sucker. Occasioually only the poste- rior pair of pouches is present, and in a few forms they are entirely wanting. The nervous system (Fig. 108) is constructed on the tyj)ical Annelid plan. It consists of a circumo'sopha- geal ring and a ventral nerve-cord composed of fibres which have their origin in ganglion-cells grouped to- gether at definite intervals into gan- glionic masses. Several of these gan- glionic masses correspond to single segments, but at the anterior and posterior extremities a considerable amount of fusion of the metameric groups of ganglia has occurred. In Clepsine plana the j)ortion of the ner- vous system which lies above the oesophagus consists of a transverse band of fibres passing hiterally into the circumcMSophageal commissures and of a number of ganglionic latter lie in front of the band of fibres. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appea
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894
