40 CALIFORNIA ACADEMY OF SCIENCES. 



salpifornics, so completely disregards the admitted inter- 

 relationships between various sections of these groups, 

 that its adoption seems to me to involve the rejection of 

 any morphological, and therefore genetic, meaning in 

 classification altogether." This author, therefore, drops 

 these three suborders entirely, and simph^ groups the 

 genera together into families. 



As already said, incidentally, the first Perophora was 

 described by Lister ('34). He did not name it, however, 

 this having been done by Wiegmann ("35), who established 

 the genus for it and designated it specifically by the name 

 of its discoverer. 



Since that time, three more undoubted species, includ- 

 ing the one that is the subject of the present paper, have 

 been added to the genus. 



The first of these three, P. Hntchiiiioiii . from Austra- 

 lia, was described by Macdonald ('59). The second, 

 from the New England coast of North America, was de- 

 scribed by Verrill ("71). This is /-*. viridis. 



In recognition of the interesting transitional character 

 of the one here made known, I propose for it anncctcns 

 as a specific name. 



DIAGNOSIS OF THE SPECIES. 



Golonu'.R irregular iu form aud size, the larger ones two or more inches in 

 length. Mostlj^ encrusting on sticks, stones, sea weeds, and on other 

 Tunicates, particularly Clavelina. Color — pale greenish yellow. 



Zooids about IJ mm. long by 1 mm. wide, short-oblong, laterally com- 

 pressed, generally crowded together, and wholly emliedded in the com- 

 mon test, but frequently remote aud with only the basal portion of the 

 bod}' embedded in the thick testicular mass surrounding the stolons. 



Test mostly thick, forming a common envelope for the ascidiozooids and 

 stolons. Transi^arent. 



Stolons much branched, anastomosing freely, ^Drovided with numerous 

 lateral aud terminal knobs, these confined to the layer of test corres- 

 ponding to the bases of the zooids. 



