352 Annals of the South African Museum. 



The J measures 9 mm. x 3 mm. The head is longer and squarer 

 than in Stebbing's figure (dorsal view) and has 3 transverse rugae 

 between the eyes. The anterior peraeopods are broken off at the 2nd 

 joints. As in Stebbing's figure, the 1st pleon segment is distinct, the 

 2nd showing very faint traces of tubercles, in other respects agreeing 

 with Stebbing's description. 



The $ measures 6 mm. x 3 mm. It agrees with the in general, 

 the head being as described above. The transverse grooves on segments 

 1-3 and those on the posterior side-plates and the tubercles on seg- 

 ments 5-7 much more pronounced than in the <^. There are also 

 distinct traces of tubercles on segments 3 and 4. The tubercles on the 

 pleon and telson are likewise much more prominent, pleon segment 2 

 with a row of small but distinct tubercles. Pleou segment 1 is 

 completely hidden under the last peraeon segment. 



Locality ; 33 53' S., 25 51' E. 26 fathoms. 1 Umkomaas 

 Eiver NW. by W. \ W., distant 5 miles. 40 fathoms. 1 ? . s.s. 

 "Pieter Faure." 6/12/98 and 31/12/00. (S.A.M. Nos. A4081 and 

 A4083.) 



GNATHOLANA n. g. 



Head narrow, immersed in 1st paraeou segment, with a small median 

 process. Frontal lamina not distinct, being fused with the median 

 process of head. Pleon segment 1 completely hidden under last 

 peraeon segment, 4th overlapping 5th. Antenna 1 with 1st and 2nd 

 joints indistinctly separated. Epistome, upper lip and mandibles 

 directed forwards. Mandibles very stout, the cutting process much 

 produced, conical, apically acute, secondary cutting-edge, molar and 

 palp normal. Maxilla 1 with outer plate unusually large. Maxilliped 

 with inner plate very small, with 1 coupling hook. Pleopod 1 not 

 indurated, peduncle not longer than broad, inner ramus half width of 

 outer. Pleopod 2 with male stylet arising from base of ramus. Uropod 

 with peduncle internally produced, outer ramus much smaller than 

 inner. 



This genus is remarkable for the great development of the mandibles. 

 It is distinguished from Hansenolana and Conilorpheus, the other 

 genera with relatively narrow head immersed in 1st peraeon segment, 

 by the absence of a distinct frontal lamina. 



GNATHOLANA MANDIBULARIS n. sp. 

 (Plate XV. Figs. 24, 25.) 



Body strongly convex. Head scarcely half the width of the body, 

 a little broader than long, deeply immersed in 1st peraeon segment, 



