GLOSSARY OF TECHNICAL TERMS. 353 



Punctate. Dotted with points. 



Pyloric cceca. Glandular appendages in the form of blind sacs opening 



into the alimentary canal of most fishes at the pylorus or passage 



from the stomach to the intestine. 



Quadrate. Nearly square ; a bone of the lower jaw in lower vertebrates. 

 Quill. One of the stiff feathers of the wing or tail of a bird. 



Quincunx. Set of five arranged alternately, thus * * * 



* * 



Radius. Outer bone of fore-arm. 

 Ray. One of the cartilaginous rods which support the membrane of 



the fin of a fish. 



Rectrices. Quills of the tail of a bird. 

 Recurved. Curved upward. 

 Remiges. Quills of the wing of a bird. 

 Reticulate. Marked with a network of lines. 

 Retractile. Susceptible of being drawn inward, as a cat's claw. 

 Retrorse. Turned backward. 

 Rhachis. Shaft of a quill. 



Rictal. Pertaining to the rictus, as rictal bristles. 

 Rictus. Gape of the mouth. 

 Rostral. Pertaining to the snout, as rostral plate. 

 Rudimentary. Undeveloped. 

 Ruff. A series of modified feathers. 

 Rugose. Rough with wrinkles. 



Sacral. Pertaining to the sacrum, or vertebrae of the pelvic region. 

 Saurognathous. Having the peculiar ("lizard-like") structure of the 



palate found in Woodpeckers. 

 Scansorial. Capable of climbing. 

 Scansorial tail. Tail feathers sharp and stiff, as in the scansorial birds 



(Woodpeckers). 

 Scapula. Shoulder blade ; in fishes, the bone of the shoulder girdle 



below the post-temporal. 

 Scapular arch. Shoulder girdle. 



Schizognathous. Split palate, as in the Heron and similar birds. 

 Scute. Any external bony or horny plate. 

 Scutellate. Provided with scutella; said of the tarsus when covered 



with broad plates in a regular vertical series, and separated by 



regular lines of impression. 

 Scutellum. One of the tarsal plates or scutella. 

 Secondaries. The quills growing on the fore arm. 

 Second dorsal. The posterior or soft part of the dorsal fin, when the 



two parts are separated. 



Sectorial tooth. One of the premolars of carnivora, adapted for cutting. 

 Semipalmate. Half-webbed; having the anterior toes more or less 



connected at base by a webbing which does not extend to the 



claws. 



Septum. A thin partition. 

 Serrate. Notched, like a saw. 

 Sessile. Without a stem or peduncle. 



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