HAUSTORIIDAE 95 



Remarks. This form exhibits some of the characters of Haustorius combined with 

 others of Urothoe. The antennae, 3rd joint of palp of maxilliped, mandibular palp, 

 gnathopod 1 , peraeopod 3, and side-plate 4 are nearest to those of Haustorius ; the other 

 mouth-parts, uropods, and the presence of a 4th palpal joint on the maxilliped, and of 

 dactyls on all the peraeopods remind one of Urothoe. On the whole the animal resembles 

 Haustorius more than Urothoe, though it has very peculiar features of its own, the most 

 noteworthy being the prolongation of the epimeron of pleon segment 2. It is certainly 

 less specialized than Haustorius . 



Phoxocephalopsis zimmeri, Schell. (Figs. 46, 47). 



Schellenberg, 193 1, p. 70, fig. 36. 

 Barnard, 193 1, p. 426 (//. psammophila). 



Occurrence'. St. WS 96. South America. Two mutilated specimens from stomach of " Psammo- 

 bates xlix," estimated length 12 mm. 



Fig. 46. Phoxocephalopsis zimmeri, Schell. a. Dorsal view of head. b. Head with antennae 1 and 2. c. Profile 

 of epistome and upper lip. d. Lower lip. e. Mandible. /. Maxilla 1. g. Maxilla 2. /;. Maxilliped. 



Description. Head with a distinct though short deflexed rostrum, in dorsal view 

 somewhat pointed, but apically rounded. Antero-lateral angle quadrate, post-antennal 

 angle obsolete. Eyes small and feeble, oval, dark. Side-plates 1-4 successively deeper, 

 1 narrowing below, 2 widening below, lower margins of 1-3 straight, 4 ovate, somewhat 

 flattened on lower margin, posteriorly scarcely emarginate. Pleon segments 2-4 with 

 the epimera produced backwards, on segment 2 strongly produced in a rounded lobe, 

 with a minute hook-like tooth below, 3 rather less strongly produced in an acute lobe, 

 also with a hook-like tooth on lower margin, 4 shortly produced in an acute lobe. Pleon 

 segment 3 not dorsally gibbous. Telson broader than long, cleft to base, lobes apically 

 subacute with a group of three spines near base on outer margin, and 3-4 along the 

 margin. 



