20 
ZOOLOGY OF THE VOYAGE OF H.M.S. SAMARANG. 
Carapace subtrigonal, sides with two large, flattened, angular teeth before the lateral 
spine, which is obtuse ; cardiac and ventricular region with two tubercles anteriorly, one on 
each side of the middle line ; a vertical crest with a minute tubercle ; and behind that, a very 
prominent, rounded tubercle, with another, rather smaller, behind it ; posterior edge of cara- 
pace with two erect angular teeth. 
Front with three spines arising from the same plane, the middle one long, slender, bent 
down, and grooved in the middle; lateral spines rather elevated, strong, triangular, with 
two small tubercles between them. 
Hab. Mauritius. 
M. tulerculatus, Leacli, MSS. 
4. MENxETIIIU S INCISUS, Be Haan. 
Fronte bieornuta, cornibus divergeiitibus acutis ; regionibus ventriculi et cordis medio acute uuispi- 
nosis ; lateribus ante medium in laciniam truncatam dilatatis. 
Hab. Japoniam. 
Front with two horns ; horns sharp, diverging, a single sharp spine in the ventricular 
and cardiac regions, the sides anteriorly dilated into a truncated border. 
Hab. Japan. 
Fisa ( Menathius ) incims, Dc Haan, F. J. p. 98. t. 24. f. 3. (femina). 
5. MENzETHIUS QUADRIDENS, Be Haan. 
Fronte bieornuta, cornibus divergentibus acutis; regionibus ventriculi et cordis convexis; thoracis 
lateribus bispinosis, spinis anterioribus ab spinulis canthorum posticis sinu separatis. 
Hab. Japoniam. 
Front with two horns : horns sharp, diverging, ventricular and cardiac regions convex ; 
sides ol the carapace with two spines, the anterior spines separated from the posterior spines 
of the orbits by a sinus. 
Hab. Japan. 
Fisa (Menathius) quadridens, He Haan, F. J. p. 97. t. 24. f. 2. (mas.) 
15. HUENIA, Be Haan. 
1. HUENIA FRONTALIS, Adams $• White. Tab. IV. Fig. 3. 
Horace mque lato atque longo, subquadrilaterali, Isevi, sine tuberculis in media linea, producto 
et postice rotundato ; lateribus acutis, uno lato lobo, postice paululum emarginato, horizontaliter undulato, 
antice arcuato, in medio depresso et postice elevato. 
Fronte latissima, lateraliter dilatata, olitusa et antice rotundata, admodum depressa, supra plana et infra 
in media linea alte sulcata. 
Chelis minimis, tlioracem fere longitudine adeequantibus, pedibus posterioribus non crassioribus ; bracliio 
trigonali, apice in parte superiore valida conica spina et postice duabus minoribus, verticalibus, conicis 
spinis in carina ; carpo supra carinato, spina tuberculari in superficie superiore et minore ; manu supra 
carinata ; carina una in medio spina et infra in valido angulari dente desinente ; tertio et quarto paribus 
