592 I'IKKUCICDINdS OF THE NATI().\AL MirSEUM. 



with one low tooth oil basal half and two teeth and a few denticles on 

 terminal lialf ; in the smaller chcliped the teeth of the pollex are all on 

 the terminal half. The ambulatory legs are of the same nature as those 

 of GrapHillm ; dactyl i nearly as loni;- as the propodi. 



JHmensions. — Ovigerous female: Length, 7 mm.; width, 0.7 mm.; 

 width of front, 4.4 mm.; exorbital width, 7.2 mm. 



Tj/pe.—'^o. 2ir>8(;, ir.S.KM. One ovigerous female. ()(f Chatham 

 Island, Galapagos Islands, 45 fathoms, station 2809. 



PORTUNID^E. 



83. PORTUNUS SAYI (Gibbes). 



Lupa myi ftinnES, Proc. Amor. Assoc. Adv. Sci., 1850, III, p. 178. 



Neptiinm aaiji A. Milne-Edwakds, Arch. Muh. Hist. N;it. I'aris, 18G1, X, p. 317, 



pi. XXIX, fig. 2. 

 I'ortnuKs uni/i Katiihun, Ann. Inst, .r.anuiica, 18!)7, I, p. 22. 



Latitude .n^ 10' north, longitude 71"^ 50' west, surface. 



84. PORTUNUS PANAMENSIS (Stimpson). 



AvheloKS panamvnsis SrmVf^ON, Ann. Lye. Nat. Hist. N. Y., 1871, X, p. 112. 

 .Nepliiinis pamnnvnuiH A. Milnk-Kdwahus, Crnst. Keg. Mcx., 1879, p. 21!); not 

 Amphilritr j)aiici>fpini8 Ijockington, 



Panama Bay, 33 and 18 fathoms, stations 2797 and 2798. 



85. PORTUNUS TRANSVERSUS (Stimpson). 



Avhiloits tranarei'siis Stimi'son, Ann. Lye. Nat. Hist. N. Y., 1871, X, ]). 111. 

 Neptunm tramveraiia A. Milne-Edwards, CriiHt. \l6g. Mcx., 1879, p. 220. 



One adult fema.le and one small immature male were taken at station 

 2800, Tanama l>ay, 7 fathoms. The male is about the size of Stim[)son's 

 type from Man/anillo, which is not extant, and agrees with his brief 

 des(;riptioii. The adult, however, possesses more strongly marked 

 characters. 



This species has, as Stimpson has remarked, the aspect of a C<(Ui- 

 ncatcs. The carapace is very broad, and the anterolateral margins are 

 little arched. The depressions separating the areolations are deep; the 

 branchial ridge is obli(iue and slightly curved; the inner branchial 

 lobes iint very well marked. The front is little advanced, the four 

 middle teeth are triangular, blunt, their tips equidistant, the median 

 pair narrower and more advanced than the next pair. The two teeth 

 above tiie antenna' are well separated from each other and equally 

 advanced, although the outer is wider than the inner. The supra- 

 orbital sinuses are open anteriorly. The eight lateral teeth are sub- 

 e(iual, becoming gradually more acute from the lirst to the eighth. The 

 first or orbital tooth is equally advanced with the outer of the four 

 median frontal teeth. The lateral spine is directed obliquely forward, 

 and is as long as the width of thc^ four preceding teeth. The posterior 

 margin is slightly concave at its middle in the adult. The inner sub- 



