CRUSTACEA FROM THE FALKLAND ISLANDS. 349 



Gen. Taxais Aiidouin & M.- Edwards. 



1829. Tmiais Audoiiin it Milne-Edwards, Precis d'Entomologie, 

 vol. i. p. 46, pi. 29. fig. 1. 



Taxais ohlini Stebbing. (PI. I.) 



Abstract P.Z.S. 1914, p. 30. (April 28.) 



The segments of the pleon successively decrease in length to 

 the sixth, which is longest of all, the curve of its hind margin 

 slightly extended at the middle ; the fourth and fifth segments 

 much the shortest. 



The eyes are irregularly ovoid, bluntly narrowed forward, the 

 front margin of the head between them not clearly made out. 

 Fii'st antennse with third joint a little shorter than second, and 

 less than one third as long as the first ; flagellum consisting of a 

 minute joint, broader than long, with fascicle of seta?. Second 

 antennte more slender and a little shorter than the first ; first 

 joint shorter than third, which is a little over half the fifth, fifth 

 I'ather shorter than fourth, fourth than second ; flagellum one 

 little joint with fascicle of setae. One of the mandibles has a 

 small tooth-like accessory plate. Whether the palp of the first 

 maxillae is divided into two joints or not, could not be made out ; 

 one of its apical setae is veiy much longer than the other. The 

 maxillipeds have an unguis-like spine or fifth joint at the apex. 



The large first gnathopod is of the ordinary type, the movable 

 finger rather longer than the thumb, the apical points of the twO' 

 curving one towards the other ; inner margin of the thumb thin,, 

 not continuous with that of the apex, and flanked with setules. 

 The slender second gnathopods have the antepenultimate joint 

 not distally widened and without spines, the next joint very 

 much longer, with needle-like finger half its length. The two 

 following pairs of perteopods have the antepenultimate joint 

 distally wddened, only a little shorter than the following joint, 

 and distally fringed with small spines, the hand and finger similar 

 to those of the second gnathopod but shorter. The three 

 succeeding pairs of peraeopods have the second joint robust, the 

 hand not longer than the wrist, slightly curved, the finger sickle- 

 shaped, with four little spines or teeth on the concave margin 

 near the apex. The marsupium on the penultimate segment of 

 the perjeon was crowded with i-ather large eggs. The pleopods 

 are as usual strongly setose. The uropods ai-e six-jointed, the 

 largest joint constituting the peduncle, the five small joints of the 

 single ramus being, except the first, plentifully furnished with 

 set;e. 



Length estimated at 4*5 mm., supposing the body to be 

 flattened out. 



Locality. Roy Cove at low spring tide. 



The specific name is given in memory of the late T)r. Axel 

 Ohlin, whose valuable researches in the Falkland Islands have 

 only been in part reported on, death having interfered with the 

 fulfilment of his i)lans. 



[9] 



