518 Arthur E. Shipley 



st Stomach. 

 sta Stalk connecting embiyo with walls of brood pouch. 

 t Tentacle. 

 tr Triangulär area. 

 vad Ventral adjustor musele. 

 vr Ventral ridge. 

 vs Ventral shell. 

 / First larvai segment. 

 // Second larvai segment. 

 Ili Third larvai segment. 

 IV Fourth larvai segment. 

 Fig. 1. A longitudinal median section througb Argiope neapolitana, showing 

 the form of the alimentary canal and its relation te the dorsal shell and 

 septum. Thepeduncle and the sub-oesophageal ganglion are also shovpn. 

 In this figure only the cuticle is drawn. 

 Fig. 2. A longitudinal section of A. neapolitana ta ken about a quarter of the 

 breadth from the side. This shows the attachment of the lophophore to the 

 dorsal shell and to the internai skeleton, also the lateral invagination to 

 form the brood pouch. The gastro-parietal band, the ovary, the occlusor 

 and ventral adjustor muscles, and some branches of the liver are also 

 seen. Zeiss a. a. Camera lucida. 



Fig. 3. A transverse section of A. neapolitana near the anterior end. This shows 

 the two dorsal extensions of the body cavity separated by the dorsal 

 septum, containing some branches of the liver. Zeiss a a. Cam. lue. 



Fig. 4. A transverse section of the same , just behind the posterior border of 

 of the septum, showing the Oesophagus, liver and dorsal ovaries. The 

 body cavity of the ventral shell is just commencing to appear, it contains 

 the ventral adjustor musele. Zeiss a a. Cam. lue. 



Fig. 5. A transverse section of the same, more posterior. Here the entrance of 

 the liver into the stomach is seen, and the Strands connecting the alimen- 

 tary canal with the ventral body wall ; these fuse more posteriorly to 

 form the mesentery. Zeiss a a. Cam. lue. 



Fig. 6. A transverse section more posterior. Here the gastro-parietal band is 

 seen, also the ovaries in the body cavity of the ventral shell. Zeiss a a, 

 Cam. lue. 



Fig. T. This section stili more posterior is cut slightly obliquely. It shows the 

 lateral invaginations to form the brood pouch. On the left side, the body 

 cavity of each shell is continuous, onthe right, itisshutoff bythegrowth 

 of the lophophore. Zeiss a a. Cam. lue. 



Fig. 8. A transverse section a little anterior to the peduncle. The posterior 

 extensions of the brood pouches are seen and the inner funnel shaped 

 openings of the oviducts, also the posterior end of the intestine. Zeiss 

 a a. Cam. lue. 



Fig. 9. Argiope neapolitana. Magnified about 4 times linear. 



Fig. lü. Argiope cuneata. Magnified about 4 times linear. 



Fig. 11. Semi-diagramatic figure of the body of an Argiope lying in the dorsal 

 shell, to show the form and relations of the lophophore. Some branches 



