26 



BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



SYMETHIS VARIOLOSA (Fabricius) 



Figure 10; Plate 5, Figures 7, 8 



Hippa variolosa Fabricius, Entomologia systematica emendata et aucta, vol. 2, 

 p. 47G, 1793 (type localitj', "in Oceano Indico"; type in Kiel Mus.). 



Symethis variolosa Vv^eber, Nomenclator entomologicus, p. 92, 1795. 



Eryon irilobaius de Freminville, Icones crustaceorum quae ad littora America 

 meridionalis reperiunter a C. P. de Freminville (MS.). 



Eryon caribensis de Freminville, Ann. Sci. Nat., ser. 1, vol. 25, p. 275, pi. SB, 

 figs. 1, 2, 1832 (type locality, Bay of Fort Royal, Martinique; type not 

 extant). — Milne Edwards, Histoire naturelle des Crustac^s, vol. 2, p. 198, 

 1837. 



ZancUfer caribensis Henderson, Voyage of H. M. S. Challenger, Anomura, vol. 

 27, p. 34, pi. 3, fig. 2, 1888. 



Diagnosis. — Anterior half of carapace eroded; front narrow. Chelae 

 elongate. Dactvli of ambulatories siclde-shaped. 



a 



Figure \Q.—Sym,eih,\i variolosa, after de Freminville: a, Dorsal view, natural size; 6, anterior half, 



ventral view. 



Description. —Surface everywhere finely granulated. Carapace one 

 and one-half times as long as wide ; anterior half with numerous eroded 

 depressions arranged symmetrically on both sides ; immediately behind 

 the frontal region the carapace rises abruptly, and the edge of the 

 ridge thus formed is drawn out into three processes, which are sep- 

 arated from one another by eroded depressions; the floor in all the 

 depressions is more coarsely granular than the rest of the carapace. 

 Frontal region considerably produced, terminating in three small 

 rounded lobes, the median largest. A rounded tooth at outer side of 

 orbit is separated by a concave depression from the anterolateral 

 tooth. Posterolateral margin a raised, sinuous, granular line. Merus 

 of outer maxilliped with a longitudinal sulcus on outer sm'face; palpus 

 abortive. Pterygostomial region moderately convex and separated 

 from the carapace proper by a deep gi'oove, which becomes continuous 

 with the line on the posterolateral border. The lingers exceed the 



