40 



the two forms not ouly iu difFeient genera, but probably in distinct 

 families. 



Lehrunia belongs to Hertwig's tribe Ilexactiniae. It seems me 

 that the division of this tribe into sub-tribes is advisable, and to these 

 sub-tribes the terms Actininae, Stichodactylinae and Thalassian- 

 thinae, employed by Andres^ might ho applied. Inasmuch as these 

 groups are characterized by the nature and arrangement of the ten- 

 tacles, I would add to them a fourth, that of the Dendromelinae*, 

 which would include Lehrunia and probably OjiModiscus, and would 

 be characterized by the presence of marginal tentacles arranged in 

 cycles, and by the possession of pseudo-tentacles arising from the co- 

 lumn wall. The relationships of this sub-tribe are with the Actininae, 

 the arrangement of the tentacles in cycles being common to both. The 

 marginal situation of the tentacles, however, is not found in the Acti- 

 ninae, though it is of frequent occurrence in the Stichodactylinae, and 

 perhaps the pseudo- tentacles are to be compared to the peculiar eva- 

 ginations of the disk which characterize the Thalassianthinae, though 

 their origin from the column wall precludes anything more than a 

 general comparison. 



Further details as to the structure of Lehrunia will be given in a 

 paper on the Actiniaria of the Bahamas now in course of preparation 

 and nearly completed. 



liaverford College, Pa. U. S., October 25*1» 1888. 



3. Osteologische Notizen über Reptilien. 



(Fortsetzung VI.) 

 Von Dr. G. B a u r. 



oingeg. 14. November 1888. 



Testudinata. 



Das Epipterygoid der r)Pinnata(i. 



Schon in einer früheren Notiz (Zool. Anz. No. 240, lS8(ì) habe ich 

 allgemeine liemerkungen über das Epipterygoid der Schildkröten ge- 

 macht. 



Spix' hat dieses Element, so viel mir bekannt, zum ersten Mal 

 beobachtet und absrcbildet. 



3 A. Andres, Fauna und Flora des Golfes von Neapel. Monographie IX. Le 

 Attinie. 1883. 



* âéyÔQoy = a tree and fii'knç = a limb or member. 



' J. B. Spix, Cephalogenesis. Tab. IV Fig. XII, XV. 20. Monachii 1815. 

 Der betreffende Schädel, der von Spix als »Tcsttido caretta« bezeichnet wird, ist 

 Testmlo marginata {nach Cu vi er, Gray). 



