NORTH AMERICAN KAMA' TKRTIAUY BRVOZOA. 315 



FIG. 87. -Genus Fiijularia Jullien, 1886. 



A-F. Figularia figularis Johnston. 1847. A, B. Zooecia and avicularia, X 25. (After 

 Hincks. 1880.) pf, pyriforru fossa of Hincks=\vide stigma of Busk. C. Detail of costules. 

 (After Norman. 1003.) D, E. Two zooecia seen on the dorsal face, exhibiting the internal 

 structure of their contents. (After Jullieu, 1SS6.) In fig. D the testicle is still without 

 spermatozooids : the ovary possesses an esg already in process of development; at the base 

 of the ovicell is seen an epithelial covering. In fig. E the testicle contains spermatozooids, 

 indicated by very fine lines; the ovary contains three nonfertile ovules, and the ovicell a larva 

 or an egg in full development, a, lophophore in the tentacular sheath ; 6, mouth ; c, pharynx ; 

 d, esophagus; e, stomach; /, gastric caecum; ;/, intestine; h, anus, i, retractor muscles of 

 the operculuni; /, parietal muscles; k, testicle; I, deferent oanal ; m, irisoid (obturator dia- 

 phragm of the tentacular sheath): . ovicell: o, ovary; p, egg in process of development 

 (larva) ; q, epithelium of the base of the ovicell; r, pseudo-cellular debris of the browil body, 

 sometimes containing diatoms and radiolaria: s, brain (so-called esophagal ganglion); t, cer- 

 vical nerve: , cellular tissue, under the abdominal wall; v, rectractor muscles of the polypide; 

 x, folds of the tentacular sheath ; ~. orifice of the ejaculatory canal on the irisoid. F. A 

 s-ooecium decalcified, X 25. (After Waters. 1889.) 



G-I. Figularia cUtliridiata, Waters, 1887. G. Avicularian mandible, X 85. H. Opercu- 

 lum of ovicelligerous zooecium, X 85. I. Operculuni of ordinary zooecium, X 85. (G-I after 

 Waters, 1887.) 



J, K. Figularia philomela Busk, 1S84. J. Basal view of the zooecium. The distal parietal 

 muscles pm' are stronger than the other groups pin. cs, compensatrix ; occl, oeclusor muscles. K. 

 Zooecium illustrating terminology. The frontal shield is composed of hollow calcareous costulae. 

 alternately arranged on the two sides of the zooecium. The rows of pores correspond with the in- 

 tervals between the costulae. The compensatrix and some of the parietal muscles are indicated. 

 (After Banner, 1902.) 



