CIRRIPEDS FROM THE JUAN FERNANDEZ ISLANDS 487 



pitulum. The left scutum is very reduced and the tergum is divided into an 

 upper and a lower part. 



Measurements in millimetres; 



Capitulum Pedunculus 



length width length thickness 



Largest individual ... 40 24 33 11 



Smallest individual . . 8,5 6,5 43 



In the internal parts there are no differences of importance from the first 

 mentioned specimens. The typical two filamentary appendages are developed. 



Locality: Masatierra, Cumberland Bay. On a buoy, 3. i. 1917, No 205. 

 Several specimens. Weltner (1895) describes large specimens collected by 

 Dr. Plate in the same place. 



Distribution: Cosmopolitan and pelagic on floating objects. 



L. australis weltneri n. var. — Fig. 2. 



Discussion and complementary description: I have named this new variety 

 for Prof. Weltner, who first described it from Talcahuano, Chile (coll. by 

 Dr. Plate). He brought it L. australis, but remarked that it differed in sev- 

 eral respects from the type: »Man konnte die hier beschriebene Form fur eine 

 neue Art halten, wenn nicht die unvollstandige Verkalkung der Schalentheile 

 und der Mangel der Eierlamellen darauf hinweise, dass hier abnorm gebildete 

 (in den Schalentheilen) und noch nicht ausgewachsene Exemplare vorliegen, 

 die ich zu Lepas australis Darw. stelle» (1895, p. 290). 



By studying the specimens in the Berliner Museum (No. 8993) it was 

 possible to establish that my material is quite the same as that described by 

 Weltner. As he had only very young specimens it was not easy to classify 

 them exactly. My material, which is much richer and consists of individuals 

 af all sizes, shows much better than Weltner's the definite form of the 

 mature individuals. These are not typical L. australis, a species I have re- 

 cently examined. But the differences are not of specific value. I do not 

 believe that the form represents a local race or subspecies because Weltner 

 has also seen specimens of the same shape from South Africa (Cape Town), 

 Thus it is better to regard them as a new variety of L. australis, of which 

 species no variety has been described before. 



In fig. 2 figures are given of some stages of this variety. The first two pupa 

 stages show the shape of the primordial valves. In the third stage figured the 

 calcareous plates are developed. The occludent margin of the scutum begins 

 to become more and more convex; thus the triangular primordial plate is 

 more removed from the margin. It is of interest to note that in the earlier 

 stages both scuta have a more or less distinct tooth (not observed by Welt- 

 ner). These teeth are not to be found in the fullgrown specimens, a character 

 considered by Weltner to be typical for this form. 



