GLOSSARY. 131 



So'leus (L. solea, a sole). A muscle of the calf of the leg 



shaped much like a sole. 

 So'matomes (Gr. sdma, a body ; temno, I cut). The ideal 



segments of which the human body is supposed to be 



formed. 

 So'matopleure (Gr. sdma, body ; pleura, side). The portion of 



the blastoderm from which the walls of the body are 



developed. 

 So'mite (Gr. sdma, a body). The name given to each segment 



of the body in the Arthropoda. 

 So'rices (L. sorex, soricis, a shrew-mouse). -The shrews, a 



family of the Insedivora. 

 So'rus (Gr. soros, a heap). The name given to the patches cf 



sporangia on the under side of the fronds of ferns. 

 Spa'dix (Gr. spadix, a date-tree). A glandular organ in the 



Tetrabranchiate Cephalopoda produced by the modification 



of the posterior tentacles. 

 Sperma'rium (Gr. spertna, seed). The organ in which the 



sperm corpuscles are produced. 

 Spermathe'ca (Gr. sperma, seed ; theke, a. repository). A sac 



in connexion with the female genital aperture of the 



Pulmonata for the reception of semen. 

 Sperma'toblast (Gr. sperma, seed ; blasios, a germ). The name 



given to certain stalk-like filaments in the seminal ducts 



upon which -the spermatozoa are developed. 

 Sperma'tophore (Gr. sperma, seed ; pJioreo, I bear). A case 



which in some Invertebrata encloses the spermatozoa. 

 Spermatozo'on (Gr. sperma, seed; zoon, an animal). The 



name given to the minute filaments which in animals 



constitute the essential male reproductive elements. 

 Spha'celus (Gr. sphakelos). Gangrene. 

 Sphene'thmoid (Gr. sphen, a wedge ; cthmos, a sieve ; eidvs, 



shape). A bone of the frog's skull, situate in front of 



the parasphenoid. 

 Sph.eniscomor'pii8e (Gr. sphen, a wedge ; ischion, the hip ; 



morphe, form). A group of birds which comprises the 



Penguins. " ii;;:::: ^V< 



Sphe 'no-palatine. The name gi\^ft~4p a foramen formed by 



the palate and sphenoid bone, thrcmgh^ which pass the 



internal nerves from the sphe-(io-palatme$ or Meckel's 



ganglion, and the nasal or spheno-maxillary arfery^ 

 Sph.e'noid (Gr. sphen, a wedge; eidbs, shape). One 



bones of the skull. 



