202 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Boie, Japan, China; D. sinensis Gray, China, B. torosus Esch., Cali- 

 fornia, Oregon ; D. viridescens Eaf., J<[orth America, eastern antl aus- 

 troripariaii regions ; D. r^iscouii Gene, Sardinia 5 D. rt6;]9er D ages, Pyr- 

 enees, Spain ; Pleurodelcs walili Michah., Spain and Portugal, Tan- 

 giers; Glossolega 2Joi>'e{i GervnU, Algiers; G.hagemnuellerihatsista, Al- 

 giers; G. verrucosa Anderson, Eastern Himalayas, Yunnan. 



DIEMYCTYLUS Eaf. 



Annals of Nature, March, 1820, No. 22, p. 5; Hallowell Journ. Ac. Phila. 

 (N. s.),iii,p. 333; Cope, Proceed. Ac. Phila., 1859, p. 126. 



NotophthalmtisRa.iiiiesq^\ie,J. c,p..^>; Baird, Journ. Ac. Phila., (N. s.) i,|i.284. 

 Molge Merre:."., Teutanien, Syst. Araphlbiaruin, 1820, p. 185 ; Boulcuger, Cat. Batir. 



Grad. Brit. Mus. , 11, G, 1882, pars. 

 Eaprocfus G6n6, Sjn. Reptil., Sardinia, p. 28 ; Bonap,, Fauna Italica ; Cope. I. c, 



p. 127. 

 Cynops Tschudi, Batr., 1838, p. 94. 

 Taricha Gray, Cat. Batr. Grad. Brit. Mus., 1845, p. 25. 



The hyoid apparatus in this genus is much as in the Pletliodontidse 

 and the Salamandridoe. There is a small hypohyal, which does not 

 articulate with the ceratohyal. In Biemyctylus torosus there is a second 

 l)rocess on each side posterior to the hypohyal,* which may be homolo- 

 gous with the similar second lateral cartilage in Lingiudaysits annii- 

 latus, or even with the otoglossal cartilage. The ceratohyal is divided- 

 tlic proximal half osseous. The first ceratobranchial and epibrauclii.il 

 are osseous. The second ceratobranchials originate from a high me 

 median longitudinal crest of the basibrauchial. The free extremity of 

 the ceratohyal is elongate, and in D. viridescens it extends all the way 

 to the Inferior surface of the exterior process of the exocciptal bone,t 

 with which it is in close contact. In the D. torosus it does not exten<l 

 so far. In both species the extremity carries with it the hyosuspensorial 

 ligament which connects it with the quadrate bone, which thus becomes 

 much longer than in other genera, (Plate 46, figs. 3, 4.) 



What name should be applied to this genus is uncertain, and may 

 perhaps ever remain so. The circumstances are as follows : In 1810, in 

 the Journal de Physique, | lxxxviii, p. 418, Eafinesque proposed to 

 replace the name Triton of Laurenti by his own name, Triturus. In 

 1820, in the Annals of Nature§ for March, p. 4, he says: "My genus 

 Triturus is the same as the Triton of Dnmeril, there being already 

 another genus of animals called Triton. It differs from the Salamandra 



* First indicated by Wiedersheim in Der Kopfskelet der Urodelen, PI. vi, tig. 91. 



t This was first shown lue by Dr. E. E. Gait in one of her dissections. 



t Prodrome de soixante-dix nouveanx genres d'auiinaux ddcouverts dans I'iut^rienr 

 des fitats Unis d'Am^riqne, dnrant I'annde 1818. 



^Annals of Nature or Annual Synopsis of new Genera of Animals, Plants, etc., Dis- 

 covered in North America, by C. S. Rafinesque, Transylvania University, Lexiugtouy 

 Ky., 1820. 



