66 CRABS OF THE FAMILY INACHIDM—M, J. RATHBVN. vol. xvii. 



SPHENOCARCINUS CORROSUS, A. M il iic-Ed wards . 

 Sphenocarciniis corrosus, A. Milne-Edwakds, op. cit., p. 13G, pi. xvii, lig. 5, 1878. 



One female with eggs, from oft' Cape Fear, North Caroliua, hit. 33° 

 20' N., long. 77° 05' W., 90 fathoms, gray sand, temperature 65.8°, 

 April 2, 1885 (15183). 



In this specimen the rostrum is longer than in A. Milne-Edwards's fig- 

 ure and the horns are divergent for their terminal half. The supraorbital 

 margin terminates anteriorly in a rounded lobe more prominent than is 

 indicated in the figure. The protogastric lobes are larger and more 

 broadly joined to the mesogastric. The middle portion of the cardiac 

 lobe is also deeper than represented in the figure. 



SIMOCARCINUS SIMPLEX, (Dauaj. 

 Huenia simplex, Dana, Crust. U. S. Expl. Exped., i, p. 133, pi. (i, tig. 3, 1852, 



male. 

 Huenia hrevirostratu, Daxa, ojj. cit., p. 134, pi. 6, lig. 4, female. 

 Simocarcinus simplex, MiKK.s, Auu. Mag. Nat. Hist. (5), iv, p. 6, 1879. 



Locality. — Western Indian Ocean; W. L. Abbott, 1 male (18130). 

 The rostrum is much longer and narrower than in the example fig- 

 ured by Dana. 



ECHINCECUS, new gcuns. 



Carapace subpentagonal, very convex in the anteroposterior direc- 

 tion. Rostrum triangular, fiattened horizontally, strongly defiexed. 

 Eyes small, in circular orbits, concealed by the carapace and situated at 

 the indentation formed by the meeting of the anterolateral and rostral 

 margins. Antenme very small, covered by the rostrum, the basal seg- 

 ment narrow. Maxillipeds with the merus notched at its antero-internal 

 angle. Abdomen of female with 7 segments. Legs short. 



ECHINCECUS PENTAGONUS, new species. 



Carapace almost smooth, convex in both directions, especially so in the 

 anteroposterior directions; i^osterior margin straight, forming oblique 

 angles with the posterolateral margins, wlii(;h are directed forward and 

 outward. Anterolateral angles rounded. Surface punctate. There are 

 a few round shallow depressions between the areas, and seven or eight 

 small low tubercles on the cardiac region. The rostrum is nearly as 

 long as its breadth at base, thin-edged, obtuse and slightly indented at 

 the tip. The eyes are withdrawn into small nearly circular orbits wliich 

 are bordered below by the small narrow basal antennal segment. The 

 flagellum is short, not reaching to the middle of the rostrum and is 

 entirely concealed by it. The antennulte are nearly longitudinal. Epis- 

 tome short. The lower surface of tlie carapace is conspicuously punctate. 

 Maxillipeds punctate; inner margin of merus convex, antero-internal 

 angle with a slight notch. Abdomen of female much longer than wide. 



Chelipeds short and stout, punctate; ischium with a low tooth on 

 inner margin; merus trigonal, Avideuing distally, witli a stout tooth 

 on each margin near the carious : carpus with two teeth on inner margin. 



