Nakratin']-: oi" Bahama Exi'Icdition. 77 



•til's hair brush in front of these origans. The eyes are small 

 and entirely devoid of pigment, giving- the impression that 

 lhe\' were not much used. Probably the brushes on the 

 ■chela' were tactile organs pushed out far in front of the animal 

 on the enormously lengthened chelipeds. 



Among the brachyurans the myioids greath- predomi- 

 nated. One species of Libi)iia is characterized b\' a great 

 horse-shoe-shaped depression on the carapace, as if the ani- 

 mal had been very deeply branded. The concave surface of 

 the depression is glistening and smooth, as if it were in some 

 \va\" artiticially produced. This mark is perfectly s\"mmet- 

 rical, however, and placed exactly on the median line of the 

 carapace. In other respects this specimen is not remarkable. 

 A species of Tlirxolambrus was secured, with a transyerse 

 and triangular carapace, an exceedingly long cheliped and 

 small chela? with conspicuous spines. All the legs are coyered 

 with spines and nodules, and the carapace is marked with 

 curious reticulations of ridges and grooves, as if water worn. 

 There is no rostrum, and the inconspicuous eyes have the 

 appearance of being functionless. A slender-limbed species 

 probabl}- belonging to the genus Podochela is characterized hx 

 its long and slender forceps, exserted eyes, and two dark 

 marks on the carapace above the bases of the walking legs. 



Among the oxystomata, Osachila titbcrosa Stimpson was 

 secured. It has the tender mouth-parts well protected by a 

 leaf-like expansion of part of the maxilliped. which forms a 

 triangular plate exactly fitting over the mouth-parts, and, with 

 its fellow, making a sort of operculum which effectually pro- 

 tects all of the appendages engaged in feeding. 



One of the interesting things about the macroura is the 

 nicety with wdiich the antennule is folded up like a pocket 

 rule, and tucked away out of sight w'hen not in use. A noyice 

 might hunt in vain for this organ in the species in question 

 without discovering it packed out of harm's way in a special 

 pocket hollowed out under the rostrum for its reception. 



The most abundant animals at this station were the ^■arious 

 -classes of Echinodermata. Of these the star-fish were the 



