401-20 4:34-40 

 ~W~'' 10 

 1144 

 10 

 5065 



To" 



5066 



lv> 



5067 

 10 



5068 

 10 

 r8444 4881-82 

 |_~6~' 9 



20 



Palk Strait. 



Off ludus Delta, 3j— 40 fathoms. 



Ganjam and Vizagapatam, 10 — 30 fath. j- " Investigator." 



Coromaudel coast, 80 — 110 fathoms. 



Gulf of Martaban, 20 fathoms. 



Akyab. F. Stoliczka. 



Hongkong. R. Hungeifoid : G. Dennys. 



2. Metapexeus affinis, Edw. Plate III., fig. 8, 8a-b. 



Penafus affinis, Milne Edwards, Hist. Nat. Crust. II. p. 416, 1837 : Spence Bate, Ann. Mag. Nat. Hist. (.5) 

 VIII. 18S1, p. 179, pi. lii. tig. 6: Ortmaun, Zool. Jahrb., Syst. V. 1890, p. 450 (P. monoceros parting: Hender- 

 son, Trans. Linn. Soc (2) V 1893, p. 448 (part.): KieLiuonje, Journ. Fieli. Bur., Tokyo, VIII. i. 1900, p. 16, pi. 

 iv. fig. 1, pi. vii. fig. 5, 5a. : Lauciitaiur. P Z.S. 1901, II. p. 572 : Eathbuu, Proc. U. S. Nat. Mus. xivi. 1902, p. 38: 

 Nobili, Boll. Mus. Torino, xviii. 1903, No. 455, p. 2 {Metapenu'u.i). 



Penaius inci^ipea, Spence Bate, Clialleuger Maurura, p. 257, pi. xxxiy. iij;. 2, 1888. 



This species closely resembles M. momceros ; but adults are distinguished 

 from that species by the form of the andricum and thelycum. 



The andricum has the same general form, buts ends distally in a pair of 

 two-lipped spouts which look something like a pair of short horns. 



The thelycum is more setose; its lateral lobes, instead of presenting a 

 sharp, salient edge, are flattish and are transversely cut into two unequal 

 segments. 



Other points which separate it from M. monoctrots are the following, in the 

 case of adults : — 



The rostrum is more curved, less uptilted, and usually a little longer, 

 and not seldom has fewer than 9 teeth : the post-rostral crest is less distinct 

 and fades away some distance in front of the posterior border of the carapace. 

 Also the carination of the anterior abdominal terga is less distinct. 



The upper antennular flagellum is longer, being three-fourths the length 

 of the peduncle, or more. 



The last pair of thoracic legs in both sexes usually surpass the tip of the 

 antennal scale, sometimes by the whole length of the dactylus. In the male, 

 there is no lobule on the posterior edge of the ischium of these legs, the notch 

 in the merus is bounded by a twisted tooth instead of a curved spine, and the 

 edge of the merus beyond the tooth is entire. 



This species very rarely attains a length of G| inches. There are 81 

 specimens in the Indian Museum registered as follows : — 



