ol8 Dr. A. Alcock — A Revision 



9. Metapeneus Mastersii, Haswell, P. L. S. N.S.W. 1879, p. 42, and 

 Cat. Austral. Crust, p. 203. (Considered by de INIan to be doubt- 

 fully synonymous with M. monoceros, Fabr.) — Australia. 



I. a. Telson tvitJioid muryinal spines ; merus of last pair of thoracic legs 



of male loithout notch at base. 

 Metapeneus Deschampsi, Nobili, Boll. Mus. Zool. Torino, xviii. 1903, 

 no. 452, p. 2, fi^-. 1.— Pondicbery and Mah^. This may possibly 

 be the non-adult form of M. monoceros, Fabr. 

 ? Metapeneus rillosus, Guerin, in Voy. ' Coquille,' vol. ii. Zool., Crust, 

 p. 36, and Icon. Kogne Animal, pi. xx. fig. 1. — Australia. May 

 perhaps belong here. 



II. Ape.v of telson 2citli 3 or 4 jjairs of lateral marginal spines. 



10. Metapeneus ensis, De Haan, Faun. Japon., Crust, p. 192, pi. xh 



fig. 2. — Japan. 

 {Metaperieus intennedius, Kishinouye, Journ. Fish. Bureau, Tokyo, 



Tiii. 1900, p. 21, is possibly the same as M. ensis {M. monocm-os 



ensis) of De Haan.) 

 This species, if my identification be correct, has no exopodite to the 



last pair of thoracic legs. 



II. Metapeneus Macleayi, Haswell, P. L. S. N. S. Wales, iv. 1879, p. 40, 



and. Cat. Austral. Crust, p. 201. (No exopodite to last pair of 

 thoracic legs ; related to M. e?2,s?s.)— Australia. 



12. Metapeneus ^tebhingi, Kobili, Bull. Mus. d'Hist. Nat. Paris, 1904, 



p. 229. (Male with a notch and spine on merus of last pair of 

 legs ; probably related to M. ensis.) — Eed Sea, Suez. 



13. Metapeneus coynatiis, Nobili, /. c. (Belongs to M. ensis gi'oup.) — 



Djibouti, 



14. Metapeneus philippinensis, Spence Bate, ' Challenger ' Macrura, 



p. 261, pi. XXXV. figs. 2, 3. (All the thoracic legs with exopodites.) 

 — East Indian Archipelago, 82-150 fathoms. 



15. Metapeneus coniger, Wood-Mason, Ann. & Mag. Nat. Hist. (6) ^•iii. 



1891, p. 272. (All the thoracic legs with exopodites.)— Off coasts 

 of India, 68-250 fathoms. 



16. Metapeneus and amanensis, Wood-Mason, t. c. p. 271. Variety of 



M. coniger. — Andaman Sea, 100-244 fathoms ; and off C. Comorin, 

 143 fathoms. 



17. Metapeneus gracilis, Dana, U.S. Expl. Exp., Crust, pt. i. p. 606, pi. xl. 



tigs. 7 a, b. (Probably belongs to M. philippinensis gi-oup.)— Sulu 

 Sea; Australia. 



18. Metapeneus Richtersii, Miers, Zool. H.M.S. 'Alert,' p. 564, pi. lii. 



fig. A. (Has exopodites on all the thoracic legs, and probably 

 belongs to the M. philippinensis group.) — Madagascar Seas. 



19. Metapeneus commensalis, Eorradaile, P. Z. S. 1898, p. 1001. (Prob- 



ably belongs to the M. pthilippinensis group.) — Kotuma, S. Pacific. 



20. Metapeneus stridulans, Wood-Mason, MS. (All the thoracic legs 



have exopodites and the antennular flagella are extremely short.) 

 This species may be the same as M. akayebi, Eathbun, which, as 

 Miss Eathbun points out, is one of the seveial species confused by 

 Spence Bate with M. velutitius, Dana. — Indian Seas, 20-35 fathoms. 



21. Metapeneus ahayebi, Eathbun, Proc. U.S. Nat. Mus. xxvi. 1902, p. 39. 



(All the thoracic legs with exopodites ; antennular flagella very 

 short.) — Japan. 

 Some of the ' Challenger ' specimens identified by Spence Bate with 

 velutinus probably b.elong here, according to Miss Eathbun. 



