Contributions to the Crustacean Fauna of South Africa. 411 



I have decided to place them iu this genus but not to assign any 

 specific name, merely giving the following brief description. 



Head large, ovoid, not much produced in front. Peraeon segment 1 

 narrower than head and very short ; segments 2 and 3 longer and 

 about as wide as head ; segment 4 a little narrower, posterior margin 

 strongly convex, i. e. the postero-lateral angles are absent ; segments 

 5 and 6 much narrower than 4, longer than broad, oblong ; segment 7 

 apparently very short and appearing more like a short 1st pleon 

 segment, but it is exactly in this region that the specimens are most 

 mutilated. Side-plates on segments 1-4 acutely but shortly produced. 

 Pleon ovate, apex broadly rounded. Antenna 1, 1st joint oblong, 

 rest of antenna consisting of 4 slender joints, the proximal one 

 inserted apically into 1st. Epipod of maxilliped narrow-lanceolate, 

 apex acute, sides nearly straight. Pleopod 1 in $ , peduncle not 

 tapering, lateral margin slightly emarginate, apex subacute, ramus 

 distinct, inserted obliquely, apex truncate and setulose. Operculum 

 in ? oval, longer than broad. Pleopod 2 in $ , peduncle nearly 

 semicircular, apex acute, stylet reaching to apex, distal half very 

 slender. 



Length: 3'25 mm. ; breadth: '75111111. 



Colour : In spirit whitish. 



Locality: Cape Point N. 89 E., distant 36 miles. 700 fathoms. 

 lcJ,l?. s.s. "Pieter Fauiv." 20/8/03. (S.A.M. No. A4067.) 



GEN. MACEOSTYLIS Sars. 



1864. Macrostylis G. O. Sars. Vidensk. Selsk. Forhl. Christ. 1863. 



1886. Beddard, Challeug. Eep. vol. 17, p. 173. 



1890. Ja.no. Meinert, Crust. Malacostr. Cruise of the "Hauch," vol. 3. 



p. 195. 



1897. Macrostylis Sars, Crust, Norw. vol. 2, pp. 120, 250. 

 1916. ,, Hansen, Dan. Ingolf Exp. iii, 5, p. 75. 



MACROSTYLIS SPINICEPS, n. sp. 

 (Plate XVII. Figs. 10-12.) 



Male. Body smooth, glabrous. Head broader than long, anterior 

 margin not greatly produced, straight, postero-lateral angles acutely 

 produced. Peraeou segments 1 and 2 subequal, postero-lateral angles 

 of 1 acute, of 2 subacute ; segment 3 longer, especially at the sides, 

 postero-lateral angles acutely produced ; segments 4-7 sharply marked 

 off from the anterior segments, gradually decreasing in width, 4 shortest, 

 5 and 6 subequal, postero-lateral angles of each produced into acute 



