494 PROCEEDINGS OP THE ACADEMY OP 



nante ; fimbria regulariter declivi, contractu, tubulis subelongatis, confertis, 

 hie illic dichotomis ; disco parvo, perforationibus paucis, valde irregulari- 

 bus." Reeve. 

 Sab. Moluccas. 



HuMPHREYIA. 



1. H. S t r a n g e i , A. Adams, sp. 



Aspergillus Strangei, A. Adams, Zool. Proc. p. 91, 1852. 

 Reeve, Monog. Asp. t. 2, f. 4, 1860. 

 Brechites Strangei, H. and A. Adams, Genera, ii. p. 339, 1856. 

 Humpkreyia Strangei, H. and A. Adams, Genera, ii. p. 650, 1858. 



Gray, Zool. Proc. p. 317, 1858. 

 Description. " H. testa, adbserente, fuscescente-carneo tincta, valvis sub- 

 quadrato-ovatis, postice latioribus, subangulari-expansis ; vagina brevi, dis- 

 torts, quadrato-rotundata, ad angulas quatuor obtuse carinata ; fimbria 

 discoque lateraliter compressissime distortis, perforationibus perpaucis, ir- 

 regulater sparcis, parum tubulosis." Reeve. 

 Sab. Sydney Bay, Australia. 



On the Genera Panolopus, Centropyx, Aristelliger and Sphserodactylus. 



BY E. D. COPE. 



Panolopus Cope. 



Form elongate ; body fusiform, tetragonal. Anterior extremities without 

 digits ; posterior with a rudimentary one on the inner border. Scales minutely 

 parallel-keeled. Inferior palpebra squamous. Inter-parietal and fronto-pari- 

 etal distinct ; fronto- and internasal confluent, forming a nine-sided shield. 

 Supranasals, nasals, first upper labial and rostral plates confluent. Nostril 

 longitudinal, in contact with an incomplete labial suture. Dentition pleuro- 

 dont ; teeth obtuse. Auricular opening present. 



This genus, though presenting the structure of rostral plate attributed by Dr. 

 Gray to his family Sepsidse, appears to be an extreme form of the series of 

 genera of Scincida; (the Diploglossinae), which we commence with Microlepis, 

 Diploglossus, etc., and in which the first non-developement of extremital 

 parts is seen in Sauresia. Evesia exhibits a somewhat similar though more 

 degraded condition, and perhaps bears a like relation to certain genera of 

 smooth-scaled Scincida? Saurophthalmia. Besides the present^ America 

 possesses six genera which exhibit a deprivation of one or both pairs of ex- 

 tremities or of digits above the number of three on each foot. They are dis- 

 tributed between the families of Scincidse, Chalcididae and Zonurida^ The 

 same families, with another, the Chamaesauridse, are represented in the 

 Old World by no less than thirty-one genera of similar kind. Twelve of 

 these are confined to Africa, ten to Australia. The fact that this arrangement 

 of diminishing series is exhibited by so many categories or families of the 

 Lacertilia, and not only by families, but by s6families within themselves, 

 instead of as a great ordinal gradation toward the Ophidia, is worthy of 

 our closest attention. 



The close analogies presented by the recent acrodont and pleurodont Stro- 

 bilosaura, and their widely divergent affinities with the orders of the past, arc 

 also scarcely less suggestive. 



P. costatus, Cope. 



Posterior border of rostral plate chevron-shaped. Internasal bounded late- 

 rally by anterior supraorbital and prefrenal. Five scales in the supraorbital 

 series, bounded beneath by a smaller series of five, of which the anterior is 

 elongate, and rests on the median frenal. Postfrenal small. Suboculars two, 



[Dec. 



