BEPOET ON THE BEACH YUBA. 
319 
Lithadia lacunosa, Kingsley. Florida, Sarasota Bay. 
Lithadia rotundata , A. Milne Edwards. Mouth of the Bermejo. 
Lithadia gramdosa, A. Milne Edwards. Santa Cruz (to 115 fathoms). 
Lithadia (?) scidpta, Haswell. North-East Australia ; Fitzroy Islands ; Arafura 
Sea (to 36 fathoms). 1 
Lithadia cariosa, Stimpson, var. (?) (PI. XXVI. fig. 2). 
cf. Lithadia cariosa, Stimpson, Ann. Lyc. Nat. Hist. New York, vol. vii. p. 238, 1860. 
A small male obtained at Bahia (shallow water) is in the collection, to which 
Stimpson’s detailed description will apply in all points except the following : — The 
ridge connecting the front with the median protuberances of the carapace, and also the 
hepatic regions, are not very prominent and distinctly granulated, and these median 
protuberances are evenly granulated like the rest of the dorsal surface. The front is 
without a median fissure. The outer maxillipedes are evenly granulated, and the merus 
of the chelipedes has a series of more prominent granules on its posterior margin. The 
dactyli of the ambulatory limbs are indistinctly granulated. The unique specimen is of 
very small size. The distinctions above cited may prove to be of specific importance, 
but other specimens are needed for comparison in order to determine this point. 
I cannot identify this form with any of the other described species of this genus. 
Merocryptus, A. Milne Edwards. 
Merocryptus, A. Milne Edwards, Journ. Mus. Godeffroy, vol. iv. p. 85, 1873. 
Carapace dorsally convex and uneven and tuberculated, somewhat rhomboidal, 
concave on the hepatic regions and on the postero-lateral parts of the branchial regions, 
and with the branchial regions prolonged at the junction of the antero -lateral and 
postero-lateral margins, the lobes thus formed somewhat cylindrical as in Ixa, but less 
considerably developed ; posterior margin with two prominences, which are most 
developed in the males. Front concave or bilobated, and rather prominent. Orbits 
small, with the marginal fissures indistinctly indicated ; the interior hiatus of moderate 
1 Ebalia mammillosa, Desbonne and Schramm, Crust, de la Guadeloupe, p. 54, belongs, according to Dr. 
Stimpson, to this genus ; I have never been able to consult a copy of this work. 
Lines. Millims. 
Length and breadth of carapace, about 
Length of a chelipede, . 
Length of first ambulatory leg, 
3f 7-5 
H 7 
3 6-5 
