GLYPTOLITIIODES CRISTATIPES. 43 



form of a laterally-compressed tooth projecting dowuwai-d and forward be- 

 tween the bases of the eye-stalks. Antennal scales armed with a few blunt 

 spines on each margin. Abdomen with three longitudinal rows of calcareous 

 plates. Internal or superior margin of carpus of chelipeds produced to a 

 dentate crest. Ambulatory legs short, flattened, spineless, witli margins pro- 

 duced into dentated and crenated crests. 



This genus is established to receive the species provisionally referred to 

 the genus RhinoUthodcs Brandt in my preliminary report on the Crustacea 

 of the "Albatross" Expedition of 1891.* Since the present memoir was sent 

 to the press I have received from the United States National Museum, through 

 the kindness of Mr. J. E. Benedict, a pair of RhinoUthodes wosnessensJdl Brandt, 

 the type of the genus BhliioUthodes. It is clear that the species described by 

 me is generically distinct from Brandt's species. In RhiiioUlhodcs the legs arc of 

 moderate length, their segments subcylindrical and heavily armed with spines : 

 in Gl'/ptoUthodcs these appendages are very short (the meri projecting but 

 little beyond the sides of the carapace), flattened, destitute of spines, their 

 anterior and posterior edges produced so as to form prominent crests which 

 on some of the segments are entire, on others crenate or dentate. In EJdno- 

 lithodes the upper part of the rostrum forms a rounded tubercle shorter than 

 the lower uncinate process : in Gli/ptolithodcs the upper part of the rostrum 

 forms a conical subacute tooth, far surpassing the inferior process. The cai*- 

 diac area in RhinolitJiodes is elevated and sjaherical : in GI//ptuUlhodcs this area 

 lies at the bottom of a deep fossa bounded by the raised portions of the 

 branchial areas. On the whole, the relations between Rhlnolifhodes and 

 Gl^ptoUthodcs are less close than those which exist between the former 

 genus and PJiylloidhodcs. 



Glyptolithodes cristatipes Fax. 

 Flak VII., Fly. 2, 2% 2\ 2'. 



RhinoUthodes crislalipes Fax,, Bull. Mus. Conip. Zool, XXIV. 163, 1893. 



The carapace is subtriangular in outline, its surface devoid of setas but 

 covered with low squamiform tubercles ; the whole gastric area is raised into 

 a conical prominence ; there is also a prominent crescentic rounded ridge on 

 each branchial region, enclosing the cardiac area in a deep fossa open only 

 behind. The rostrum is straight and conical, with a vertical plate projecting 



* Bull. Mus, Cump, ZoOl., XXIV. 103, 1893. 



