Mr. G. A. Boulenger on Elapomorphus lemniscatus. 321 



described at the end of the order Ecuinonemata, under a new 

 family, viz. " Pseudoechinonemata." 



So the remaining group in the family Pseudohircinida, viz. 

 the Pseudoarenosa, in which the spiculation of a Ilalichon- 

 drina or an Esperia may be often seen in a perfect or entire 

 state, may, under the same circumstances, be added to the 

 order Holorhaphidota under the family name of " Pseudo- 

 holorhaphidota," to correspond in nomenclature and significa- 

 tion with those already proposed for the Rhaphidonemata 

 and Ecuinonemata respectively. 



[To be continued.] 



XXVI. — Remarks on the Variations of. Elapomorphus lem- 

 niscatus. By G. A. Boulenger. 



[Plate X.] 



Simultaneously with the publication, in the last number of 

 these ' Annals,' of my "List of Reptiles and Batrachians from 

 the Province Rio Grande do Sul, sent to the Natural-History 

 Museum by Dr. H. von Ihering," I received, through the 

 kindness of Dr. A. Strauch, a separate copy of his contribu- 

 tion, " Bemerkungen iiber die Schlangengattung Elapomor- 

 phus aus der Familie der Calamariden "*. One species is 

 described as new, viz. E. Ilieringi, from Rio Grande do Sid, 

 which is the form mentioned in my " List " as a hitherto 

 unrecorded variety of E. lemniscatus, distinguished by the 

 absence of the black vertebral band. 



The fact that Dr. Strauch had only one specimen before 

 him, and none of the allied forms for comparison, explains the 

 error into which he has fallen. But I trust the illustrations 

 appended to this note will convince the eminent herpetologist 

 that the differences relied upon by him are not sufficiently 

 constant to warrant a specific, or even subspecific, distinction. 



We have at present in the Natuial-History Museum eight 

 specimens determined as E. lemniscatus, to which, for conve- 

 nience, I will refer by letters : — 



a. Adult. (Ventrals 204, Caudals 22.) Paraguay (Prof. Grant). 



b. Adult. (V.208, C. 22.) 1 



c. Half-grown. (V. 185, ('. 25.) • Uruguay. 



d. Young. (V. 192, C. 26.) j 



e. Adult. (V. 208, (J. 25.) j 



f. Adult. (V. 209, 0. 26.J J. Rio Grande do Sul (Dr. von Ihering). 

 >. Young. (V. 180, C. 28.)) 



h. Adult. (V. 212, C.24.) High Pampas of San Luis, Mendoza 



(Mr. E. W. White). 



* Med. Biol. Ac. St. P<5tersb. xii. pp. 141-211 (1885). 



