pronounce the little chorus frog, Pseudacris ocularis^ much smaller. 

 Cuba we understand has a still smaller frog. 



Most of the seven families have extremes in size. The tree frog 

 adults vary from 7/16 inch (11.5 mm.) in the little chorus frog {Pseuda- 

 cris ocularis) to 5 1/5 inches (130 mm.) in the Key West tree frog 

 {Hyla septentrionalis). The robber frog adults vary from 5/8 inch 

 (15 mm.) in Camp's frog {Syrrhophus campi) to 3 1/2 inches (90 

 mm.) in the Texas cliff frog {Eleutherodactylus latrans). The adult 

 toads vary from 3/4 inch (19 mm.) in the oak toad {Bufo quercicus) 

 to 6 3/5 inches (165 mm.) in the Colorado River toad {Bufo alvarius). 

 The adult spadefoots vary from 1 1/2 inches (37.5 mm.) in Ham- 

 mond's spadefoot {Scaphiopus hammondii) to 2 3/4 inches (72 mm.) 

 in Holbrook's spadefoot {Scaphiopus holbrookii holbrookii). The adult 

 frogs vary from 1 3/8 inches {36 mm.) in the northern wood frog 

 {Rana cantabrigensis) to 8 inches (200 mm.) in the bullfrog {Rana 

 catesbeiana). Two groups have little variation in their extremes. The 

 narrow-mouthed toads vary in adults from 4/5 inch (20 mm.) in the 

 Texas narrow-mouthed toad {Gastrophryne texensis) to 1 5/8 inches 

 (41 mm.) in Taylor's toad {Hypopachus cuneus). The one species of 

 ribbed toads {Ascaphus truei) varies from 1 1/8-2 inches (28-51 mm.) 

 in length. 



General appearance. Usually, these accounts were written with a 

 live specimen or specimens in hand. Each gives the form of body 

 (habitus) of the animal, the color of the animal and some of the other 

 outstanding characters. Often the animal is compared to a closely 

 related species or to the common type of the group. In a debatable 

 form, excerpts from the original description or from subsequent 

 pertinent accounts are given to help in solving the difficulties sur- 

 rounding the species. 



Structure. This section is meant to supplement the characters 

 given under general appearance or to add to characters used in the 

 keys. Wherein general appearance is written from living animals, 

 structure is added from examinations of preserved specimens and from 

 published descriptions. Unless otherwise stated, all measurements in 

 descriptions or keys are relative to the body-length (represented 

 by L.). This paragraph is written in the abbreviated form preferred 

 in scientific descriptions. 



