STRUCTURE AND DEVELOPMENT OF LOXOSOMA. 331 
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EXPLANATION OF PLATES XIX— XXI, 
Illustrating Mr. S. F. Harmer’s Paper “ On the Structure and 
Development of Loxosoma.” 
Reference Letters. 
ac. Cells at the apex of the vestibule in L. Leptoclini. afg. Aperture 
of foot-gland, age. Aperture of gland-cell. at. Lateral expansion of foot. 
an. Anus. b. Bud. bl. Blastopore, blc. Blastoccel. br. “ Dorsal organ ” 
(= Brain), cd. Ciliated duct of nephridium. cr. Ciliated ring. ct. Con- 
nective-tissue cell. ctp. Large cells in tentacles of Pedicellina. cut. 
Cuticle, ean. External aperture of nephridium. ebp. Glandular epithelium 
