IXDEX-GLOSSARY. 391 



Ttv-, TOV-, stretch), in Vertebrates The membrane lining the abdominal 



cavity, 161, 244, 293. 



Perivisceral Surrounding the viscera, 60. 

 Permanence, of areas, 347. 



Fes, in Vertebrata The foot, 176, 230, 241, 269, 282. 



Pessulus (pessulus, a bolt), in the syrinx A slender bar of cartilage run- 

 ning dorso-ventrally, 248. 

 Petrous part (of periotic), 273. 

 Peyer's patches, in the Rabbit Lymphatic thickenings in the wall of the 



small intestine, 286. 



Phalanx A joint of a digit, 188, 239, 241, 281, 282, 327, 329. 

 Pharynx ($<ipuyl, used in modern sense) The part of the alimentary canal 



next succeeding the mouth-cavity, 13, 28, 38, 57, 76, 139, 160, 189, 



242, 285. 

 Phillipines, 349. 

 Phylogeny (pwXav, a tribe ; ytwcia, I produce) The development of groups 



(phyla), 1. 



Phylum (p;uv) One of the main groups of organisms, 1. 

 Physiology (Quri;, nature ; Ayo;, a discourse), 1, 2; Amoeba, 9; Vorticella, 



14; Hydra, 23; Astacus, 83; Anodonta, Unio, 109; Helix, 122; 



Amphioxus, 136 ; Scyllium, 153 ; Rana, 175 ; Columba, 229 ; Lepus, 



268 ; Homo, Chap. xiv. 

 Pia mater A delicate vascular membrane investing the cerebro-spinal axis, 



168, 210. 



Pigeon = Columba, q.v. 

 Pillar, of Fornix, 301. 

 Pineal body, 2, 168, 210, 216, 253, 301. 

 Pinna (pinna, a feather), in the Rabbit The external flap of the ear, 



319. 



Pisces (pisces, fishes) Fishes, 343 ; Chap, ix., 152. 

 Pituitary body, in the brain A rounded non-nervous structure connected 



with the infundibulum, 169, 210, 253, 273, 301. 

 Placenta (placenta, a cake) in Mammals A vascular structure, bringing 



the embryo into relation with the mother, 168, 310, 338. 

 Placoid (<rXaJ, anything flat and broad ; ^;, /$-, appearance), of Scale- 

 Developed both from epidermal and dermal elements, 155. 

 Plants, 5. 

 Plasma (Xaoy*, anything which has been formed) The liquid part of the 



blood or lymph, 78 ; germ Plasma The part of the nuclear protoplasm 



of a sexual cell, which enables it to develop into an embryo, 74. 

 Plate Cribriform p., 275, 323; Neural (Medullary) p., 151, 224, 261; 



Orbital p. 233 ; Sclerotic p., 256. 



