ASCIDfA PRODUCTA. 107 



are continued to the bottom of the branchial sac. It is 

 ribbed pretty-closely on the right side, and has the 

 margin strongly pectinated ; the points vary in size, 

 the larger ones are in continuation of the ribs, the 

 smaller, of which there are one or two between the 

 larger, originate in the membrane itself : the left side 

 is covered with large, curved, pointed papilla?, arranged 

 for the most part in transverse rows : the tentacular 

 points on the left side of the mouth are minute ; they 

 form a continuous series from a little above the mouth 

 to the bottom of the branchial sac. The branchial 

 tubercle is loop-formed with both extremities turned 

 to the left side. The tentacular filaments are numerous, 

 slender, and of moderate length ; they do not vary 

 in size and are rather closely set. 



The ovary is branched and tubular ; a few of the 

 terminal branches appear at the end of the intestinal 

 loop on the right side, but the greater portion of the 

 organ ramifies over the inner margin of the loop on 

 the left side, where the branches become united to the 

 extremity of the wide oviduct, which, penetrating the 

 loop, appears at this side. The male casca are long, 

 sometimes a little branched, and usually bifid; they 

 are spread over the right side of the intestine, but are 

 somewhat obscured by the cellular matter which coats 

 the alimentary tube. There are a few casca also at the 

 other side of the intestine. 



AschU'i in-nilndn evidently belongs to that group of 

 which A. iuoriinta and tl^ressa are typical; but has 

 many characters to distinguish it from all others. 

 Three or four mature individuals were procured ; but, 

 as they had all been for some time in spirit before 

 being examined, their colour could not be determined 

 satisfactorily. A few young specimens, however, which 

 had been preserved in a weaker spirit, retained their 

 original colour. In these the test was of a fine, pale 

 green, and the mantle and viscera of a full, dark green. 

 Mr. Norman thinks that the mature specimens, when 

 taken, were also of a green colour. 



