160 Miscellaneous. 



travelled in the direction of the germinal vesicle, which disappeared ; 

 but the development went no further. 



With this exception, I have never succeeded in discerning the body 

 of the zoosperm in the interior of the vitellus. I do not think that 

 it persists ; I much rather believe that the male centre is the 

 product of the fusion of this body with a little vitelline protoplasm. 

 The attraction that the zoosperm exerts upon the vitelline substance, 

 and especially upon the female pronucleus, seems to me to be placed 

 beyond doubt by observations that I have described. The mutual 

 repulsion of the male centres appears to me to be a corollary of their 

 attraction for the female centre, just as the repulsion exerted upon 

 one another by the two poles of an amphiaster is the corollary of 

 the attraction they exert upon the surrounding protoplasm. — 

 Comptes Rendus, April 2, 1877, p. 569. 



On two new Genera and Species of Lizards from. South America and 

 Borneo. By Dr. Steindachnek. 



The genus Tejovaranus forms a transition towards the family 

 Ameividse, and is distinguished from the typical Varanidse, which 

 belong to the eastern hemisphere, by the presence of pterygoid teeth, 

 by the elongate cordate form of the tongue, which has no sheath at 

 the base, and by the size of the mental and rostral scutes and of the 

 upper and lower labial scutes. Ventral scutes flat, quadrangular, iu 

 regular transverse rows, like the small slightly convex dorsal scutes. 

 Tejovaranus Braniclcii is marked like Tejus teguexin, Linn., and has a 

 large light-yellowish brown spot on the nape. 



The genus Lanthonotus is characterized by the absence of an ex- 

 ternal ear. The head is depressed, oval, covered with very small, 

 partly keeled scutes ; the back bears several rows of large tubercles, 

 iipon each of which lies, as if imbedded, a keeled horny scute ; the 

 tongue is elongate cordate, papillose, without a sheath. The ex- 

 tremities and the toes are short, and the eye remarkably small. In 

 the author's opinion, the genus Lanthonotus is the representative of 

 a distinct family, which would most closely approach the Mexican 

 Heludermidse. 



Lanthonotus horneensis is tile-red on the back, and marked with 

 brown on the yellow ventral surface. The skin of the back forms 

 innumerable slight verruciform elevations, among which there are 

 six, and in some parts eight, longitudinal rows of large tubercles, 

 each of which bears a keeled scale. The flat ventral scutes are 

 pointed behind and slightly imbricated. The tail is roundish. — 

 Anzeiger der Jcais. Alcad. der Wiss. in Wien, July 5, 1877. 



