PATAGONIAN EXPEDITIONS I ZOOLOGY. 



EXPLANATION OF PLATE XLIX. 



PAGE 



Fig. i. SEMISCOLEX VARIABILIS : Dorsal view of one of the larger specimens, 



XT ... 6 ?o 



Fig. 2. " " Dorsal view of twelve anterior somites, same 



specimen, X T 5 - 



Fig. 3. " " Ventral view of same, X Figs. 2 and 



3 are somewhat diagrammatic 

 Fig. 4. " " Ventral view of anterior thirteen somites of 



a young example, accurately drawn to 



show the relative development of the 



annuli and position of the ganglia, X *j a - 

 Fig. 5. " " Dorsal view of posterior end of specimen 



shown in Fig. i , X T 5 - 



Fig. 6. " " Ventral view of same, X T 5 - 



Fig. 7. " " Lateral aspect of anterior end of same, X^- 



Fig. 8. " " Lateral aspect of posterior end of same, Xnr- 



Fig. 9. " A somewhat diagrammatic outline, showing 



the chief peculiarities of the alimentary 



canal, X about -f- 672 



Fig. 10. GLOSSIPHONIA DUPLICATA : Reproductive organs dissected and viewed 



from above ; surface texture of testes 

 shown on left side, X ^ 678 



Fig. ii. GLOSSIPHONIA SIMPLEX: General features of alimentary canal, dorsal 



view, X^ 68 1 



LETTERING : a, anus ; at, atrium (penis sheath or prostate cornua) ; de, ductus 

 ejaculatorius ; ep, epididymis ; gan, ganglion, the neuromere indicated by a Roman 

 numeral ; gc, gastric caeca ; ga, glandula albuginea ; tc, intestinal caeca ; m, mouth ; 

 n, nephropore ; ode, common oviduct ; ov, ovary ; ph, pharynx ; phg, pharyngeal 

 glands ; pg, prostate glands ; t, testes, the serial number of which is indicated by a 

 numeral ; va, vagina ; vd, vas deferens. The somites are numbered with the usual 

 Roman characters, the annuli with their symbols. 



(VOL. in) 



