On the Anatomy of the Temnopleuridse. 109 



To such a statement I can only reply by placing before the 

 reader the full list of the lizards occurring in the district now- 

 indicated by Prof. Heilprin as affording support to his views. 



Lacertilia of the United States east of the Mississippi. 



[The species with au asterisk prefixed are the only ones which reach 

 40° N. lat.] 



Geckonid^ 1. Sjphcerodactylus notatus. 



i *2. Sceluponis undulatus. 



IGUANID^ ] 5- -— >''"^^!^"^- . 



1 4, Anohs caroiinensis. 

 ( 5, Cooperi. 



Angtjid^ 6. Ophiaawus ventralis. 



Teiid.e *7. Cnemidophorus sexiineatus . 



AMPHiSBiENiD-^ .... 8. Uliineura fiurklana. 



!9. Lyyosoma latercde. 



*10. Eunu'ci'S quinquelineatug. 



il. anthracmus. 



12. onocrepis. 



XV. — On some Points in the Anatomy of the Temno- 

 pleuridffi. By Prof. P. Martin Duncan, M.B. (Lond.), 

 F.R.S.,&c. 



[Plate XI.] 



Theee is a great group of Echinoidean genera which is well 

 characterized by a raised costulate or reticulate ornamentation 

 of the plateSj more or less grooved, furrowed and pitted 

 sutures, small peristome, feeble branchial grooves, and small 

 external branchia3. The ambulacral plates are compound, 

 the pairs in series of three, the tentacles homiopodous, the 

 foramen of the pyramids closed above, and the teeth keeled. 

 This group falls readily under that subfamily of the family 

 Glyphostomata which my colleague Mr. Percy Sladen and 

 myself called the Temnopleurida3 in our description of the 

 Tertiary fossil Echinoidea of Kachh and Kattywar (Pal. Ind. 

 ser. xiv. 1883, p. 54). But it is now necessary to advance 

 the subfamily to the dignity of a family, for the group is 

 large, requires subdivision into subfamilies, and is well sepa- 

 rable from the other divisions of the Glyphostomata, such as 



