554 Talorchestia, Ceina 



21 — 25-jointed. Gnathopod 1 in d, 5^^ Joint apically furnisbed with nar- 

 rowly rounded process, 6**^ distally little widened, with slightly concave palm, 

 overlapped by the finger. Gnathopod 2 in d, 6^^ Joint short but broadly 

 ovate, palm slightly convex and oblique, joining the almost straight hind 

 margin in a gentle curve, the long tinger closing between 2 rows of spines 

 which line the palm. Gnathopod 1 in Q , 5^^ Joint without process, 6*** 

 narrowing to the apex, which is hardly wider than base of finger. Gnatho- 

 pod 2 in 9, 5*^ Joint broad, front margin very convex, hind produced into 

 a central lobe, 6*^ almost as long as S**», produced into a broadly rounded 

 lobe beut forward so as to project beyond the minute, longitudinally placed 

 finger. Peraeopod 5, 2^ Joint with 13 — 15 spines on the hind margin, which 

 is straight with rounded corners. Uropod 3, ramus rather shorter than 

 peduncle, L. 9 11, ö 8 mm. 



Flores. Under stones in and at the margin of the rivulet Lella. 



T. africana Bäte 1862 T.? a., Bäte, Cat. Amphip. Brit. Mus., p. 15 t. 2 f. 6. 



$ . Side-plate 5 as deep as the preceding and very broad, nearly as broad as 

 length of 3 segments of peraeon. Eyes small. Antenna 1 as long as peduncle of 

 antenna 2. L. 14 mm. 



Port Natal [South Africa]. 



T. COOkii Filh. 1885 T.c, Thalorchestia c, filhol in: Recu. Passage Venus, 

 t'.3ii Zool. p. 459 t. 53 f. 4; Planches p. 28 | 1893 Orchestia? cooki, A. Della Valle in: 

 F. Fl. Neapel, t;. 20 p. 512 | 1898 O.tumida (part.), G. M. Thomson in : Tr.KZealand Inst., 

 V.S1 p.203. 



Probably identical with T. tumida (p. 550). Only (5 described. L. 17 mm. 



South-Pacific (New Zealand). 



6. Gen. Ceina Della Valle 



1893 Ceina (Sp. un.: C. egregiä), A. Della Valle in: F. Fl. Neapel, u20 p. 530 | 

 1899 C, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p. 397. 



Antenna 1 longer than peduncle of antenna 2. Maxillipeds, finger of 

 palp broad, subti'iangular. Gnathopod 1 in d and Q , and gnathopod 2 

 in 9 subchelate, small. Gnathopod 2 in d much larger, subchelate or (in 

 maturity) chelate. üropod 3 tuberculai*, witbout rami. Telson partially cleft. 



1 species. 



1. C. egregia (Chilton) 1883 Nicea e., Chilton in: Tr. N. Zealand Inst., v.lb 

 p.77 t. 2 f.2a— 1 1 1886 N. e., G. M. Thomson & Chilton in: Tr. N. Zealand Inst, ».18 

 p.l44 I 1888 N.? e., T. Stebbing in: Rep. Voy. Challenger, u29 p. 1712 | 1893 Ceina e., 

 A. Della Valle in: F. Fl. Neapel, v. 20 p. 530 t. 58 f. 14—21. 



Body much compressed, segments imbricated and subcarinate, more 

 sti'ongly in 9 than in d, peraeon segment 1 produced somewhat over the 

 head, especially in 9 . Head produced slightly upward at base of antenna 1. 

 Side-plates 1 — 4 successively deeper, 5*^^ — 7*^ much shallower. Pleon seg- 

 ment 3, postero-lateral corners rounded. Eyes of moderate size, round. 

 Antenna 1, 2^ Joint slightly shorter than l*'*, 3*^ than 2^, flagellum subequal 

 to peduncle, with sensory filaments. Antenna 2 about 75 ^s long as body, 

 ultimate and penultimate joints of peduncle equal, flagellum rather longer 

 than peduncle. Lips, mandible and maxillae 1 and 2 undescribed. Mandible 

 not showing (in figure) spine-row or molar. Maxillipeds with 2 rounded 

 apical teeth on inner plate, 1^* Joint of palp produced on outer side beyond 



