A New Genus of Phreatoicidae. 223 



length to its breadth, and of ahnost circular outline ; the dactylus 

 is longer than the preceding joint and narrower, and the 

 extremity rounded. 



Fh'st Appendage of Fere ion. — Not having seen a female I can 

 only speak of the male form. The basis is short, being only a 

 little longer than its greatest breadth, narrow at the neck, front 

 margin almost straight and hind margin deeply convex. Ichium 

 rather broader than long, posterior margin converging outwards 

 from each end to meet in the middle length of the joint as a 

 sharply defined angle ; opposite margin convex. Merus very 

 short, twice as wide as long ; anterior margin squarely produced 

 forward. Carpus rather narrowly jointed to the merus ; hind 

 margin convex ; front margin abruptly curving outwards to form 

 a wide union with the propodus. The remainder of the appen- 

 dage has been sufficiently described. 



Second, Third and Fourth Appendages of Fereion. — These agree 

 in general shape with Fhreatoicus aiistralis, but do not bear 

 nearly so many spines and setae, only the penultimate and 

 antipenultimate joints bear any spines, and these are along the 

 posterior margin. The last joint has beside the terminal nail a 

 tooth on the inner margin, which agrees with each of the known 

 members of the family, but is very small in Fhreatoicopsis. (In 

 my remarks following F. shephardi, I stated that the dactyli of 

 the legs did not have a secondary unguis ; this only applies to 

 the three last pairs, for the second, third and fourth have a 

 secondary nail or tooth.) The merus of the second pair is rather 

 more expanded than the third and fourth. The fourth is shorter 

 than the third and exhibits no sexual differentiation in the two 

 last joints as in Fhreatoicns. 



Fifth, Sixth, and Seventh Appendages of Fereion. — These are 

 similar to each other in form, and each succeeding pair gradually 

 increase in length, the fifth being equal to the fourth. The 

 dactyli of each is long with the margin entire. 



Fleopoda. — These possess all the characteristics of Fhreatoicus ; 

 relatively they are broader, and the exopodite which the last 

 three pairs possess is larger and fringed with long setae. 



First pair with protopodite narrow ; exopodite twice as long 

 as broad, jointed to protopodite near its inner margin ; outer 

 margin entire, curving upwards and outwards, then down- 



