610 PROCEEDINGS OF THE NATIONAL MUSEUM. 



the lioi)atic ro};ion ; on the briincliial n'gion lour to six larj^er tuber- 

 cles; behind these are iive broad, acute teeth, increasing successively 

 in size, the third most produ(;ed outwardly. On the posterior niarj;in 

 tliere are two teeth next to tlie postero lateral, followed by a tubercle; 

 the innermost tooth is the smaller; they reach a little behind the level 

 of the posterolateral tooth, but uot so far as the middle portion of the 

 posterior niarjiin. 



The chelipeds have a surface similar to that of the carapace — that is, 

 there are many large tubercles, irregular in size, and disposition, and 

 the intervening space is covered, though not crowded, with granules. 

 The manus is considerably longer than high; the four distal teeth of 

 the upper margin are about ecjually advanced; the immovable liuger is 

 very slightly detlexed. 



Dimensions. — Male: Length, 20.5 mm.; width at middle, 23.6 mm.; 

 greatest width, -1.4 mm.; width at posterolateral angles, 22.0 mm. 



7',y^,.._No. 21.V.U;, IJ.S.N.M. One male. Southern part of Gulf of 

 California, 2G| fathoms, station 2823. 



Additional sprcimrn. — Oiu^ young specimtMi was taken near the type 

 locality on a subsecpient cruise, oil San Josef Island, 40 fathoms, station 

 2098. 



135. CYCLOES BAIRDII Stimpson. 



Ci/cloiK hairdii Siimpson, Ami. Lye. Nat. Hist. N. Y., lHi\0, Nil, j). 2I}7. 

 Panama Hay, 3.? fathoms, station 270(1. 



136. PLATYMERA GAUDICHAUDII Milne-Edwards. 



VJaUjmera (jaudtohdudil Mii-nk-Kdwakos, IliHt. Nal. ("nist., Wil, II, p. 108. — 



Mil,NF,-Ki)\VAl{|)8 ami Lucas, D'Orbifiiiy's A'oy. rAiiu-r. Mi rid., 1SI3, N'l, I'fc. 1, 



p. 28; 1H17, IX, pi. XIII, lijj. L 



I'latiiuivni caHfoniieiiais Uatiimun, Proi'. U. S Nat. Mus., 18!)3, XVI, p. 253. 

 » 

 Panama Bay, 47 and 51.^ fathoms, stations 2S04 and 2805; ott" Abreo- 



jos Point, Lower California, 48 fathoms, station 2834. 



MATUTID.IC. 



137. HEPATUS KOSSMANNI Neumann. 

 llepdtushoHKiiuiiini Nr.i'MANN, Catiilog Pod. Cnisl. Iliidolbt i<;crIMii8., 1878, p. 28. 



Panama Bay, 7 and 14 fathoms, stations 2800 and 2801. 



138. HEPATUS LINEATUS, new species. 



(PliiteXLlV, lifr. .1.) 



Carapace narrow and high; hepatio region smooth; front advanced, 

 thick, truncate; first to sixth segments of abdomen of male tuherculate. 



This species dillers from all others in its narrower carapace, which is 

 very strongly arched, the height being about one-third the width. As 

 is customary in the genus, there are eight clusters of tubercles. The 

 three posterior groups consist of one large tubercle and from eight to 



