Xarkatixe of Baiia.ma Exi'iourrioN. 77 



■el's hair brush in front of these organs. The eyes are small 

 and entirely devoid of pigment, giving the impression that 

 they were not much used. Probablx' the brushes on the 

 cheke were tactile organs pushed out far in front of the animal 

 on the enormously lengthened chelipeds. 



Among the brachyurans the myioids greatlv predomi- 

 nated. One species of Libinia is characterized b\' a great 

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

 mal had been very deeply branded. The conca\'e sin-face of 

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

 Avay artificially produced. This mark is perfectlv svmmet- 

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

 carapace. In other respects this specimen is not remarkable. 

 A species of T/^y^olaiiibnis was secured, with a transverse "jrv 

 and triangular carapace, an exceedingly long cheliped and 

 small chela* with conspicuous spines. All the legs are covered 

 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 ha\x' the 

 appearance of being functionless. A slender-limbed species 

 probably belonging to the genus Podochcla is characterized bv 

 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 tnberosa Stimpson was 

 secured. It has the tender mouth-parts well protected b\- 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 effectualh' pro- 

 tects all of the appendages engaged in feeding. 



One of the interesting things about the macroura is the 

 nicety with which the antennule is folded up like a pocket 

 rule, and tucked away out of sight when not in use. A novice 

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

 without disco\ering it packed out of harm's \\z\.\ in a special 

 pocket hollowed out under the rostrum for its reception. 



The most abundant animals at this station were the various 

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



