284: CRUSTACEA. 



Length of carapax of a female, one inch and seven lines ; breadth, 

 two inches and three lines; ratio of length to breadth, 1:1-6. This 

 is a broader species than the crenata, with a more spinous hand. 

 The outline of the front (by the front edge of the lobes) is quite 

 straight and not arcuate. The penult joint of the posterior legs is 

 spinulous below. The hands are rather slender. The arm has three 

 or four spines on its anterior margin, the two outer large and oblong. 



THALAMITA CRASSIMANA. 



Carapax valde transverse, Icevis, nitidus, regione mediand 2 lineis 

 elevatis intersectd; fronts, recto, lobis latis, perbrevibus, truncatis, 2do 

 latiore quam Stius, 3tio rotundato, lobo prceorbitali longo, paululo 

 prominente, maryine antero-laterali 5-dentato, denlibus acutis, 3#io non 

 breviore, 4to brevissimo. Articulus antennae externce \rnus prcelongus, 

 cristd irregulariter divisd. Pedes antici crassi, manu paulo tumidd 

 supernd 5-spinosd (margine superno spinis duabus medianis, ad 

 apicem mdld), extus 2-costatd, superficie minute tuberculatd, carpo 

 k-spinoso et minutd tuberculato, bradiio marginem anticum 3-spinoso. 



Carapax strongly transverse, smooth, shining, median region crossed 

 by two raised lines ; front straight, lobes broad, very short, trun- 

 cate, second broader than third, third rounded, praeorbital lobe long, 

 little prominent, antero-lateral margin five-toothed, teeth acute, 

 third not shorter than second, fourth very short. First joint of 

 outer antennae very long, crest irregularly divided. Anterior feet 

 stout, hand somewhat tumid, above with five spines (two median 

 spines on upper margin and no apical), on outer surface two ribs, 

 surface minutely tuberculate, carpus with four spines and minutely 

 tuberculate, anterior margin of arm with three spines. 



Plate 17, fig. 9 a, male, natural size ; b, under view of part of front, 

 showing crest of base of antennas ; c, outer view of hand ; d, summit 

 of inner branch of first maxillipeds. 



Length of carapax, one inch and seven lines ; breadth, two inches 

 and three lines; ratio of length to breadth, 1:1-6. The species 

 appears to be the Thalamita prymna as figured by De Haan (PL 12, 



