428 PROCEEDINGS OF THE ACADEMY OF [1894. 



spines below the calyces. Hemipenis simple. The genus belongs to 

 the Dipsadinse. 



Psammodynastes has a divided penis which is spinous to the tip 

 and not calyculate. The spines are arranged in the branches in 

 oblique series, pinnate to the sulcus. Not knowing the structure in 

 Psammophis I cannot determine the affinity of the genus. 



In Osceola (elapsoidea) the penial characters are like those of 

 Ophibolus doliatus; i. e., the calyces are numerous and fringed. In 

 Ophihohis they are very few and have entire borders. I therefore 

 place 0. doliatus in Osceola. All the species of Ophibolus agree in 

 the character assigned. 



The Dromicus flavilatus Cope, of the S. E. coast regions of the 

 United States, has the penial structure of Rhadinaea Cope, and does 

 not belong to Dromicus. The organ is undivided, and the calyculate 

 region is capitate. We have here a case parallel to the genus 

 Liodi/tes, of which the type species was supposed to be a Helicops. 

 Both these Floridan forms turn out to be allies of types found on 

 the North American continent. 



Caiisus Licht. has the character of other Solenoglypha, i.e., 

 coarsely spinous at the middle, and calyculate above, and deeply 

 bifurcate. In C. rhombeatus, the only species examined, there is at 

 the middle of each branch a longitudinal fissure-like interruption of 

 the calyculate structure which contains feeble laminte on its sides and 

 fundus. The calyces are papillose. 



As regards the structure of the lungs, I have to add observations 

 on two species not previously examined. In Anomalodon madagas- 

 cariensis there is no tracheal lung nor auricle of the large left lung. 

 The rudimental right lung measures about 6 mm. In Psammo2:)liis 

 irregularis the structure is similar in the points mentioned, except 

 that I could not discover a rudimental right lung. 



Calotes versicolor Daud. 



