BY PROFESSOR T. THOMSON FLYNN. 95 



a little larger than the other. The smaller one (co-type) 

 reproduces, in all but very minor details, the character- 

 istics of the larger one. 



Holotype, one female, Tasmanian Museum Collection, 

 Nos. C 1667-71. The Holotype consists of one sj>irit 

 specimen and four microscope slides representing the four 

 right legs. 



Go-type, one female, Biological Museum Collection, 

 University of Tasmania. 



3. Ammothea australiensis, sp. nov. 



Plate XIV., figs. 4, 5, and 6. 



The specimen is very minute, and was collected 

 amongst sponges and mussels at Shark Island, Port Jack- 

 son, N.S.W. Unfortunately, in tearing apart two closely 

 adhering mussel shells, the little animal was considerably 

 damaged. The result is that the left palp and the third 

 right and left legs are missing. In addition to this there 

 is a considerably older injury of somewhat more serious 

 consequences. At some tinre or other the ovigers have 

 been broken or toi'n apart in a. curiously symmetrical 

 way, only the basal three joints and a part of the fourth 

 joint on each side remaining. The broken ends have 

 been rounded off and healed showing that the injiiry is 

 of some standing. 



Description. — Colour brownish yellow (in life and after 

 preservation in alcohol). 



Body stout with intersegmental divisions strongly 

 marked. The transverse ridges of the body, dorsal and 

 ventral, are very distinct. JJorsally each culminates in 

 an acutely pointed median elevation. None of these is as 

 high as the ocular tubercle. The crurigers are separated 

 from one another by distinct but varying distances. This 

 distance is greatest between the second and third pair. 



The cephalon is expanded and is shield -shaped. The 

 first pair of crurigers is united with the cephalon, almost 

 the whole of the anterior border of each of these 

 being continuous with the postero-lateral border of the 

 cephalon. A slight projection of the cephalon gives sup- 

 port for the basal joint of each palp, and there is a much 

 more pronounced ventro-lateral eminence for the attach- 

 ment of the oviger. Separating these elevations on each 

 side is an obliquely running gi'oove. 



The ocular tuhercle, situated about the middle of the 

 cephalon, is erect, with a rounded summit surmounted 

 by a sha.rply pointed apex. It is of greater height than 



