MAIOIDEA. 



tuberculate ; hand very stout, fingers very widely gaping, the upper 

 unidentate near base. First joint of outer antennae produced at 

 apex, but not acute. 



Plate 4, fig. 1 a, male, enlarged four diameters ; b, under view, 

 twelve diameters; c, abdomen of male, four diameters; d, anterior 

 legs; d', d", views of hand and fingers; e, one of the eight posterior 

 legs ; /, tarsus of the same. 



Dredged at Lahaina, Maui, Hawaiian Islands. 



Length, three and a half lines; greatest breadth, a little more than 

 three lines. The body is very short and thick, with rounded sides, 

 and the posterior margins are villous. Just anterior to the cardiac 

 tubercle, at some little distance from the medial line, there is on 

 either side a very small tubercle in addition to those above mentioned. 

 The fingers of the hand have on the inner margin a few tufts of setae 

 towards apex, as shown in fig. 1 d. The posterior legs have the mar- 

 gins densely villous. The first joint of the outer antennae has a pro- 

 minent line, extending from the outer apex obliquely backward and 

 inward to the inner basal portion, so as to appear to have a trian- 

 gular under surface, at first sight, with the apex very narrow; but it 

 widens within somewhat, where it gives insertion to the next joint. 



HALIMUS TUMIDUS. 







Rostri cornua subconica, laid divaricata. Carapax valde tumidus, 

 latere 46 spinulis minutis armafo; regions mediand tribus tuberculis 

 parvulis triangulate ornatd, olio tuberculo obsolescent^ posteriore; 

 regione cardiacd tuberculis obsolescentibus notatd. Pedes pubescentes, 

 sat breves ; manu tenui, basin latiore, digitis fere contiguis, tenuibus ; 

 articulo 5fo pedis postici duplo longiore quam latiore. Articulus 

 antennarum externarum \rnu8 apice externo valde productus ex- 

 tusque 23-spinulosm. 



Horns of beak subconical, of moderate length, widely divaricate. Cara- 

 pax tumid, sides armed with four to six spinules; stomach region 

 with three small tubercles triangularly placed, and another faint 



