REPORT ON THE BRACHYURA. 2 QI 



prominent, blunt. Branchial margin with three lobes, one of 

 which is antero-lateral. The lobe at the postero-lateral angle 

 is much the largest and most produced. The branchial hol- 

 lows are much larger than in the other species of the genus; 

 the posterior openings are each nearly as large as the cardiac 

 lobe; the anterior openings are each about one-half as large 

 as the posterior, and separated from them by narrow bridges. 

 The surface between the anterior openings is much depressed. 

 The two lobes of the posterior margin are small and subtri- 

 angular. The outer surface of the merus of the chelipeds 

 has three blunt thickened lobes or teeth. The palm is much 

 swollen; its anterior or outer margin has a bilobed crest. The 

 upper surface of the crab is covered with depressed granules 

 so crowded as to present a honey-comb structure. The more 

 elevated portions are in addition tuberculated. On the lower 

 surface, there are many more tubercles, which are large and 

 bead-like, and tend to form on the abdomen reticulating lines. 

 The tubercles margining the ambulatory legs are large and 

 acorn-shaped. 



Dimensions. — Length 9.7, width at postero-lateral angles 

 12, width at median lateral lobe of the branchial region 11.4, 

 height 5, greatest diameter of posterior opening 3.1, least 

 diameter 2 mm. 



120. Iliacantha subglobosa Slimpson. 



Stations 25 and 26, off Key West, 60 fathoms; station 41, 

 off Sand Key, 15 fathoms. 



Iliacantha liodactylus sp. nov. PI. vin, Fig. 2. 



Three -posterior acute spines; fingers longer than palm; 

 dactyli of ambulatory legs not grooved. 



The shape of the carapace is broadly oval, as in subglobosa. 

 The granules are visible to the naked eve but are not large 

 as in sfiarsa and intermedia ; they are distant from one another 

 and the intervening space is covered with minute punctae. 

 The lateral margin is bluntly angulate on the hepatic region 

 and again on the branchial region about half way back on the 

 carapace; the margin is indicated by a definite line of crowded 

 iv — 3 2 A 2 



