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The carina of the carapace extends ahnost to the hinder edge. 



The rostrum is about as long as the first segment (jf the antennule. In all the other 

 specimens it is broken, but it appears not to have been much longer in any of them. The 

 surface of the body is very slightly tomentose". 



It is apparent from these measurements that in Spence Bate's figure in the Report on 

 the Challenger Macrura the 6'^ abdominal somite has been figured too narrow. Nothing is 

 known about the rostrum of the female and unfortunately I did not inquire after the measurements 

 of the leo-s, in the figure, however, the meri of the three chelipeds appear more slender than 

 in Hcmip. Sibogae. 



Aristeus Duv. 



Of the 5 species included in this genus, two are inhabitants of the eastern Pacific, the 

 East Indian Archipelago and parts of the Indian Ocean, viz. i" A. virilis Sp. Bate that is 

 known from the Philippine Islands, the New Hebrides. and from the Andaman Sea, while it 

 was taken bv the "Siboga" at seven Stations in the Indian Archipelago, 2'-' A. semidentatus 

 Sp. Bate, a species observed near the Kermadec Islands, off Banda, in the Bay of Bengal and 

 in the Arabian Sea, while two specimens, were taken by the "Siboga" at the Kei Islands. A 

 third species, 3° A. occidentalls Fax., is found in the western Pacific, off the coast of Central 

 America. The fourth, 4" A. antillensis Bouv., occurs in the Sea of the Antilles, 5" A. anten- 

 tiatus Risso, finally, the species on which this genus was established by Duvernov, inhabits 

 the Mediterranean and the temperate and subtropical parts of the eastern Atlantic. As regards 

 their vertical distribution all the species of this genus are subabyssal, the greatest depth at 

 which this genus has been observed, being 1440 m., viz. A. antennahis, but this species has 

 also been captured off Algiers in water of moderate depth (Bouvier). 



f 6. Aristeus virilis (Sp. Bate). 



Hemipenaeus virilis C. Spence Bate, Challenger Macrura, 1888, p. 303, PI. XLIV, Fig. 4. 

 Hemipenaeus tomentosns C. Spence Bate, Challenger Macrura, 1888, p. 307, PI. XLIX, Fig. 



2, 3; 1^1- L- 

 Aristaeiis virilis J. Wood-Mason, Ann. Mag. Nat. Hist. Ser. 6, Vol. VIII, Oct. 1891, p. 279. 

 Aristaens virilis A. Alcock, Indian Deep-Sea Crustacea, Decapoda Macrura and Anomala, 



Calcutta. 1901, p. 30. 



Stat. 38. April i. 7°35'.4S., II7°28'.6E. Flores Sea. 521 m. Coral. 7 males and 3 females. 

 Stat. 74. June 8. 5°3'.5 S., 119° o' E. Strait of Makassar. 450 m. Globigerina ooze (obviously 



a thin layer). 4 males and 3 females. 

 Stat. 161. August 17. 1° io'.5 S., 130° 9' E. Halmahera Sea. 798 m. Muddy sand. i male, 



2 females. 

 Stat. 173. August 28. 3°27'.oS., i3i°o'.5 E. Ceram Sea. 567 m. Fine, yellow grey mud. i female. 

 Stat. 212. September 26. 5"^ 54'.5 S., I20°I9'.2E. Oft' Saleyer. 462 m. Fine grey and green 



mud. I female. 

 Stat. 262. December 18. 5°53'.8S., 132° 48'. 8 E. Near Kei-Islands. 560 m. Solid bluish grey 



mud, upper layer more liquid and brown mud. i male and i female. 

 Stat. 316. February 19. 7°I9'.4S., 116° 49'. 5 E. Bali Sea. 538 m. Fine, dark brown, .sandy 



mud. 7 males and 13 females. 



27 



