BY W. A, HASWELL, M.A., B.Sc. 471 



number of individuals are by no means so great in the former group 

 as in tlie latter. As with the Amphipoda the home of the Australian 

 non-parasitic marine Isopoda is among the luxuriant algae and 

 sponges in the temperate zone ; the abundance and variety of the 

 invertebrate life populating these miniature forests, in Port Jackson 

 for example, being extremely great, and the Edriophthalms 

 forming one of the most striking features. Further north both 

 Amphipoda and Isopoda become very much rarer ; among the 

 alga3 on the shores of Moreton Bay I have been able to detect but 

 a very few species, and in Port Denison they become extremely 

 rare. 



Genus CouoxoruiLUS, (novum). 



Body slightly convex, abdomen markedly narrower than the 

 thorax, with six free articulations ; terminal segment lamellar ; 

 epimerpe distinct though small ; head rather narrower than the 

 first segment of the thorax. Eyes very large ; antennee sub-equal, 

 stout, inserted under the head. Mandibles with elongate palpi. 

 Maxillipedes small, operculiform, three- jointed. Thoracic limbs 

 all anchor-like, with long dactyla. Posterior abdominal 

 appendages free, uniramous. 



Codonophilus argus, 5^;. )ioc., Plate XVI., fig 1. 



Eyes very large, extending on the under surface of the head. 

 Thoracic appendages sub-equal, all with much elongate, curved 

 and pointed dactyli. Pamus of abdominal appendages falciform 

 with a few scattered cilia. Terminal segment scale-like, acuminate. 

 Length 5/32 in. 



Found under the bell of a Rhizostoma in Port Jackson. 



This species approaches JEgatlioa, Dana, in many respects ; but 

 differs from it in the sudden narrowing of the body at the 

 commencement of the abdomen, and the uniramous character of 

 the caudal appendages, 



