vol. 2,pt. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 181 



stm.= stomach. 



t.= testis. 

 test=teat. 

 w.=oral sphincter muscle of upper lip; often numbered u.l, u.2, u.S, 



etc. 

 v.=dorsal visceral muscle. 

 «/=ventral portion of dorsal visceral muscle. 

 v/ / = ventral visceral muscle. 

 v. d.=vsi3 deferens. 

 ven.= ventral. 

 v. Z.=ventral languet. 

 v. m. Z.=ventral mid line. 



v. s.= ventral atrial sphincter, or ventral portion of atrial sphincter. 

 zx=brown muscle of oral siphon in Iasis. 

 z.=zone of large cells in the ganglion, from which the nerves arise. 



Plate 1. 



Cyclosalpa pinnata. 



Fig. 1. — Solitary form seen from the right side. X, 2. 



2. — Ventral view of the ciliated funnel (dorsal tubercle) and adjacent structures 



in the solitary form. 

 3. — Aggregated zooid, seen from the right side. X, 3. 



4. — Ventral view of the ciliated funnel and adjacent structures in the aggre- 

 gated zooid. 



Plate 2. 



Cyclosalpa pinnata. 



Fig. 5. — Testis and adjacent structures. The endostyle is placed more dorsally 

 than is normal so as to show the testis more clearly. 

 6. — An antero-dextro-dorsal view of the oral end of the solitary form. 

 7. — The ganglion and dorsal eye of the aggregated zooid seen from the right side. 

 8. — Dorsal view of the same structures, including also one neural gland and the 

 ducts of both glands. 



Plate 3. 



Cyclosalpa a finis. 



Fig. 9. — Solitary form viewed from the left side. Natural size. 

 10. — Aggregated zooid, seen from the left side. Natural size. 



Plate 4. 



Fig. 11. — Cyclosalpa affinis, aggregated form; ganglion and eye from right side. 



12. — Cyclosalpa affinis, solitary and aggregated form, ciliated funnel and adjacent 

 organs. Ventral view. 



13. — Cyclosalpa Jloridana, solitary form, seen from the left side. X, 9. 



14. — Cyclosalpa Jloridana, outline drawing of the esophagus, caecum, and be- 

 ginning of the intestine, from fig. 13. 



Plate 5. 



Cyclosalpa Jloridana. 



Fig. 15. — Aggregated zooid, seen from the left side. X, 14. 



16. — Solitary and aggregated forms, ciliated funnel and adjacent organs. Ven- 

 tral view. 



