CRUSTACEA. 3 



wards, slightly grooved above, and deeply channelled below ; claws dilated, much curved, 

 grooved above, fringed on each side with long, stout hairs, curved and sharp at the ends. 



Fourth and fifth pairs of legs nearly three times as long as the carapace, much smaller 

 and more slender than the second and third pairs ; third and fourth joints about equal in 

 length: fifth joint short, broad, flattened, incurved; claws dilated, sharp and stouter than 

 the claws of the other feet. 



Hab. Sea of Mindoro ; fifteen fathoms. 



This species comes very near the Oncinopus aranea of De Haan, Faun. Japon. (tab. xxix. 

 f. 2), but its carapace is much smaller in comparison with the length and slenderness of the 

 legs. The fore-legs are much slenderer and of greater length ; the fourth and fifth pahs of 

 legs are nearly three times as long as the carapace ; whereas in 0. aranea they are only twice 

 the length of the carapace ; the second and third pairs of legs are nearly three and a half times 

 longer than the carapace, the front is more deeply incised, and the lobes are very angular. 



The Oncinopi, like the Inachi, live in rather deep water, more particularly in coral 

 bottoms, and where Keratophytes and other zoophytic forms abound. Among the branches 

 of these, like aquatic spiders in their webs, these apathetic crustaceans entangle their elongated 

 limbs ; they are, like the Pholci among Arachnidans, very inert and feeble, and excessively 

 slow and languid in their movements. 



2, ONCINOPUS ARANEA, Be Haan. 



Pedibus quartis et quintis anterioribus brevioribus, tarsis curvatis ; thoracis lateribus integris. 



Hab. Maria Orientalia (M. Mindorum) ; Adams. 



Fourth and fifth pairs of legs shorter than the anterior pairs, tarsi curved, sides of the 

 thorax entire. 



Hab. Eastern Seas (Sea of Mindoro). 



2. INACHUS, Fabricius. 



1. INACHUS LOEINA, Adams fy White. Tab. II. f. 2. 



Eegionibus ventricularibus et cardiacis convexis, bitubercularibus ; oculorum pedunculis uni-spinosis. 



Thorace trigono, supra convexo, regionibus laterakbus paullo latioribus intermedia regione ; tliorace ad 

 latera post oculos attenuato : spina tuberculari paullo prominente ad antelateralem thoracis partem ; duobus 

 validis magnis tuberculis in linea intermedia in superiore thoracis superficie, quae tuberculis minutis graira- 

 laribus et setis longis, tenuibus, sparsisque distinguitur. 



Fronte vix ad finem brachii antennarum exteriorum pertinente, profunde sulcato inter canthos in linea 

 secunda, et valido jugo longitudinali in utroque latere; apice truncato, horizontali, in medio paululmn 

 emarginato, duobus terminalibus grandiusculis lobis adornatis compluribus, rectis et crassis setis. Canthis 

 integris ad partem superiorem arcuatis et paululum protendentibus ; oculorum pedunculis lateraliter directis 

 extra canthos spina longiore et prseacuta in parte anteriore posita, ; antennis exterioribus tliorace fere dimidio 

 brevioribus. 



Chelis thorace dimidio longioribus, marginibus exteriore et interiore fimbriatis ; longis, validis, curvatis 



