16 



1145 



-jjr- Off Indus Delta, 30—40 fathoms. " Investigator." 



Japan. J. Wood-Mason, 



y 



2072 _,... ^ _ ... , -- 



Fiji Is. Bntisn Museum, 



10 



Heteeopenetjs, de Man, 



aeMan, Zool, Anzeiger, 1896, p. 111, and Zool. Jahrb., Syst. Abtb. X. 1898, p. 684, pi, xxxviii. fig. 75. 

 Nobili, Boll. Mns. Torino XVIII. 1903, No. 455, p. 4. 



Kostrum tootlied both dorsally and ventrally. Antero-inferior angles of 

 carapace not spiniform. Post-antennular sulcus defined ventrally only, by the 

 buttress of the post-antennular (antennal) spine. 



Antennular flagella short. The first pair of thoracic legs may, in the 

 adult male, be enormously elongate, especially as to the propodite ; but in the 

 female, and, as Nobili has shown, in certain adult males, may be of the ordinary 

 Peneus form. Bxopodites are present on all the thoracic legs. 



According to Nobili, epipodites are present on all but the last two thoracic 

 appendages, and pleurobranchige on the six posterior thoracic somites. 

 Andricum symmetrical, simple, much as in Peneus (s. r.) 



According to Nobili, the branchial formula is the same as that of Peneus 

 (s. r.) 



Only the following species is known : — 



Heteropeneus longimanus de Man, loc. cit. ; see also Nobili, loc. cit. ; from the 

 Java Sea and Singapore. Not represented in the collection of the Indian 

 Museum, but included here as it is an Oriental species and may reasonably be 

 expected to occur within the limits of British India. 



Metapeneus, Wood-Mason. 



Metapenieus, Wood-Mason, Ann. Mag. Nat. Hist. (6) VIII. 1891, p. 271. 

 Type : M affinis, Edw. 



Rostrum toothed on its dorsal edge only. Antero-inferior angles of cara- 

 pace either rounded or spiniform. Post-antennular sulcus defined only vent- 

 rally, by the buttress of the post-antennular (antennal) spine. No longitudinal 

 or transverse sutures on the carapace. 



Antennular flagella short or of moderate length. Endopodite of maxillules 

 (1st maxillae) somewhat abbreviated, two-jointed. Bxopodites present on all, 

 or aU but the last pair of thoracic legs. 



Epipodites absent from the 8rd maxillipeds as well as from the last two 

 thoracic appendages. No pleurobranch on the last thoracic somite. 



Andricum complicated, symmetrical or asymmetrical : if symmetrical, its 



