200 Notes on JVorth American Crustacea. 



Rostrum horizontale, breve, bifid iim. Orbitse inferne incompletEe, siipeme 

 dente preeorbitali et postorbitali prasditse. Oculi retractiles, non sese 

 latentes. Epistoma mediocre. Maxillipedum externorum meriis brevis, 

 angulo externo obtnsus, aiignlo interno incisns ; exognathus extus dilatatus. 

 Chelipedum manus valde compressa, laminato-cristata. Pedum ambu- 

 latoriorum articulus penultimus dente setose inferne ad medium armatus. 

 Pedes ambulatorii primi paris praclongi. 



This genus is near Epialtus, with lamellar expansions of the 

 sides of the earapax as in some Huenice. The exognath of the 

 outer maxillipeds has a strong angnlar dilatation of the outer 

 margin near its extremity, so that this margin hetween the 

 angle and the tip is concave. 



Miniiiliifai roliatus, nov. sp. 

 PI. III., fig. 1. 



The projecting lateral laminse form more than one-third the width of 

 the earapax. The posterior one is the larger, and it generally overlaps 

 the anterior one at the lateral fissure ; its posterior angle projects, espe- 

 cially in young specimens, giving a concave outline to the lateral margin. 

 The anterior side of the anterior lamina is transverse, and forms a pro- 

 minent angle with the outer side. There is a post-orbital tooth, at base 

 separated by an open fissure from the superior margin of the orbit. 

 Upper side of the earapax somewhat flattened, with the lateral expansions 

 a little reflexed, the gastric region a little convex, and the surface smooth, 

 covered and concealed by a thin reddish coat of minute pubescence 

 easily removed. Rostrum partly clothed with crispate setae. Pterygo- 

 stomian ridge (or branchiostegian margin) armed with three or four low 

 tuberculiform teeth. Chelipeds large ; meros and carpus angular but 

 unarmed ; inner margin of carpus projecting, laminiform, arcuated ; hand 

 and fingers much compressed ; fingers gaping in their basal half. 

 Ambulatory feet of the last three -pairs naked, angular, not compressed; 

 penult joint obtusely crested above. Ambulatory feet of the first pair 

 compressed, especially in the young, and angular; ischium and meros 

 armed with tubercles or spines below, most prominent in the young ; 



