Contributions to the Crustacean Fauna of South Africa. 377 



wide as segment 6 and not forming part of the lateral margins. 

 Telson apically obtuse. Epistome produced forwards between the 

 1st antennae as a narrow spiuiform process. 1st and 2nd joints of 

 antenna 1 expanded. Maxilliped with 4th-6th joints inwardly 

 produced, 7th joint neither long nor slender. Peraeopods normal, 

 the anterior ones without natatory setae and with the 6th joint not 

 enlarged, 4th joint of peraeopod 1 not produced. Inner ramus of 

 pleopod 1 twice as long as broad. Outer ramus of pleopod 3 un- 

 divided. Uropod with peduncle and inner ramus fused, lamellate, 

 outer ramus rudimentary, minute, tubercular. 



This genus is closely allied to Paracassidina Baker, but differs 

 in the 1st peraeopod and the narrow 7th peraeon segment. The 

 degeneration of the outer ramus of the uropod has been carried 

 further, and the antero-lateral angles of the 1st peraeon segment are 

 more produced. 



In general shape there is a striking though superficial likeness 

 between the present species and the South Australian Amplwroidella 

 eUiptica Baker, belonging to the Eubranchiate group. 



Wishing to dedicate this genus to Mr. W. H. Baker, who has 

 very materially increased our knowledge of the South Australian 

 Sphaeromids, and finding that with various suffixes the name is 

 pre-occupied, I have taken the liberty of translating it into Greek. 



ARTOPOLES NATALIS n. sp. 



Female. Body depressed, the central portion slightly convex, 

 elliptical, the margins finely ciliate, dorsal surface minutely shag- 

 reened. Head embraced laterally by the 1st peraeou segment, 

 anterior margin slightly arcuate with a small blunt median point. 

 Eyes moderately prominent. 



Peraeon segment, 1 produced forwards laterally, where it is more 

 than twice as long as in the centre. Segments 2-4 short dorsally 

 and laterally ; segment 5 considerably longer laterally than dorsally ; 

 segment 6 shorter laterally than segment 5, segment 7 not reaching 

 the lateral margins. 



Pleon segments 2-4 (the 1st is invisible) fused, only segment 2 

 reaching the lateral margins. 



Telson basally forming part of the lateral margin, then rapidly 

 narrowing to the broadly rounded, subtruncate apex, central portion 

 slightly vaulted dorsally. 



Epistome projecting forwards between the 1st antennae as a narrow 

 spiniform process. 



Antenna 1 with first 2 joints expanded, 1st longer than broad, 



