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tlicuppor siiilacti of tlio tail in a ivliciilatc iiiamu'r. The limbs arc 

 palor than the back, and tiic di^iits art" cross barml with whitish. 



The habitat of this sj.ccics is uiikiiowu. The only spocimon was 

 Ibiina in a Jar with a speciinoii o! lHoiiycti/his tomsxs and one of Ii<()m 

 toiqwraria; the former ('alifornian, the latter Pala-arctic. 



])IC A M 1 'TODON St ranch. 



Strand), Salmn., p. (i^; r.oiilongfir.C'at. ISatr. (irail. lirit. Afns., 2il cd., l.S8-,>. p. 38. 



Tongne nearly entirely adherent. I'alatine teeth in two lonj,' trans- 

 verse arched series, convex forwards, con verj-inj; backwards, sit nated 

 behind the line of the (;hoana', si>parated from each other by a wide in- 

 terspace. Toes live, Tail compressed. 



This genus I have not seen. Its characters and those of its only 

 species are copied from 15onlen;;er's work above (pioted. 



DICAMPTOl^ON 1:NSATIIS Kscli. 

 Straiicli, /. c, p. r.'.1; HonU'iij^cr, Cat. liatr. (Jrad. Uiit. Mus./Jil nl., 1>-S2, p. .38. 

 Tiiloii oisaliis, Escliselioll/, /.(><'>1. Atlas, ]). ('<, I'l. 'J-J. 



Ilealbroad. Snont rounded. I'.ody stout. Lind)S short. Toes free. 

 Tail Sivord-shaped, (curved upwards, as long as liead and body. Skin 

 nearly smooth; parotoids and costal grooves appai-ently absent. L'ed- 

 dishbrown; back marbled with brown. Total lenstli about four decim- 

 eters. 



I liavc not seen this sjjecies, and know it only from the figures and 

 descriptions above cited. It is said to come from California. 



IIYNOIillDJ:. 



JTijtwh'ihlKC C(t])e, prno. Acatl. I'liila.. 1<)1>, p. l'2r>. 



Otoglossal cartilage, none; a second ei)ilu'auchial. Second basi- 

 branchial not continuous with the first. 



Vertebra' ami>hico'lous. 



No parasphenoid teeth; vomerines on the posterior edge of the 

 vomeropalatine bone. Pterygoid bones distinct. 



According to Wiedersheim* two genera of this family, llynobius 

 and Eanidens, jjossess a lachrymal bone in addition to the prefrontal. 

 Whether it is a characteristic of the other genera remains to be ascer- 

 tained. The same author shows (/. c.) that the hyi)ohyal caililages are 

 very elongate in the two genera named, and are not articidaled with 

 the basibranchial, thus permitting of inde[)endent m(>tion. (See IMate 

 25, figs. 10-11.) Jle also tigures a cartilaginous coune(!tion luitweeu tli*' 

 stapes and the cpradrate, as occurs in the Trematodeia, whicdi is a char- 

 acter of ninch importance. 



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