OSE ace etn: ; 
ae | PROCEEDINGS OF THE NATIONAL MUSEUM. at 
Mithrax nodosus Bell. 
__ Mithrae nodosus Bell, Trans. Zool. Soc. London, 11, p. 53, pl. x1, fig. 1, 1836. Miers, 
re Challenger Rept., Zool., Xvu1, p. 87, 1886. 
| Mithraculus nodosus White, Cat. Brit. Mus. Crust., p. 7, 1847. Stimpson, Amer. Jour. 
H Sei., XXIx, p. 132, 1860. A. Milne Edwards, Miss. Sci. an Mexique, pt. 5, 1, p. 
108, pl. xx, fig. 5, 1875. 
A single soft-shell specimen of a male without chelipeds was collected 
| at the Chatham Island, Galapagos Archiy elago, by Dr. W. H. Jones, 
| U. S. Navy (13873). 
| Previously recorded from Chili. 
Mithrax cristulipes (Stimpson). 
Teleophrys cristulipes Stimpson, Ann, Lye. Nat. Hist. N. Y., vu, p. 190, pl. 1, fig. 2, 
1860; Amer. Jour. Sci., XXIX, p. 133, 1860. A. Milne Edwards, Miss. Sei. au Mexi- 
que, pt.5,1, p. 113, pl. xrx, fig. 2, 1875. 
Mithrax (Teleophrys) cristulipes Miers, Jour, Linn. Soe. London, X1v, p. 667, 1879. 
Pocock, op. cit., XX, p. 508, 1890. 
- ? Mithrar Dristitinies Mie rs, Challenger Rept., Zool., Xvu, p. 87, 1886. 
Two specimens, nale and female, were collected at Rio Formoso, 
Pernambuco, Brazil, by R. Rathbun during the Hartt explorations of 
1875-77. The types from Cape St. Lucas, said to be in the Smith- 
fe sonian Institution, are not extant. California and the Bay of Panama 
are also given as localities for-this species. Mr. Rh. I. Pocock, loc. cvt., 
gives a detailed description of a specimen found at Fernando de No- 
ronha, which he doubtfully refers to this species. 
4 The male from Pernumbuco agrees with his specimen in nearly every 
- detail. The tubercles of the anterolateral margin are very small. The 
_ merus of the cheliped is furnished below with three small teeth. There 
| is one minute tooth on the middle of the pollex. The teeth of all the 
legs are much smaller and less conspicuous than in the figures of cris- 
| tulipes. The female has smaller chelipeds, fingers less gaping, two small 
teeth on the pollex in the gape, and no teeth on the lower margin of 
_ the merus. 
As this Museum possesses no specimens from the west coast of “Amer- 
ica, and as the individuals at hand are more or less imperfect, the 
writer is unwilling to designate them as a distinet species. 
Mithrax sp., Miers. 
Op. cit., p. 89, pl. x, fig. 3. 
An immature female collected off Cape Catoche, Yucatan, lat. 220 15/ 
N., long. 87° 04’ W., 24 fathoms, station 2365, by the U.S. Fish Com- 
mission, 1885 (16052), apparently belongs to the same species as me 
young specimens described by Miers from Fernando Noronha, 7 to 2 
fathoms. As our specimen is no larger than those collected by me 
~ Challenger, and has only one cheliped and one of the first pair of ambu- 
~ latory legs, I prefer not to give it a name, hoping that at some future 
time more perfect specimens may be obtained. 
Proe. N. M. 92-18 
