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anterior end of the tergum ; telson as long as the 6''» somite. Longer (inner) flagellum one-fourth 

 shorter than the distance (12 mm.) between the end of the peduncle and the frontal border 

 of the carapace. Antennal flagella as long as the body. The external maxillipeds extend just 

 beyond the antennal scales; the legs of the i^' pair reach to the end of the antennal peduncles, 

 those of the 3'"'^ to the middle of the terminal joint of the antennular peduncle and the legs 

 of the 5''' pair extend almost with half the length of their propodi beyond the antennal scales. 



Both in the male and in the female the t h r e e last pairs of thoracic legs bear n o 

 epipod, just as in the genus Parapeneopsis^ a fact of which Col. Alcock (1. c. 1906) makes 

 no mention. 



General distribution: Off Ganjam coast, Ganjam and Vizagapatam, Mangalore 

 (Malabar coast), Sandheads (Alcock). 



f35. Parapcnaciis rectaciUiis (Sp. Bate). 



Penaeus rectacutus C. Spence Bate, Report Challenger Macrura, 1S88, p. 266, PI. XXXVI, 



Fig. 2. 

 Metapenaeus rectacutus J. Wood-Mason, Ann. Mag. Nat. Hist. Oct. 1891, p. 274. 

 Metapenaeus rectacutus A. Alcock and A. R. S. Anderson, Journal Asiat. Soc. Bengal, LXIII, 



Part II, 1894, p. 145. 

 Peneus (Parapeneus) rectacutus A. Alcock, Catal. Indian Deep-Sea Crust. 1901, p. 17. 

 Parapeneus rectacutus A. Alcock, Catal. Indian Decap. Crust. Part III. Macrura. Fase. i. 



Calcutta, 1906, p. 33, PI. VI, Fig. 19, iga, b. 



Illustrations Zoology Investigator, Crust., PI. XLIX, Fig. 5, (^ , 1901. 



Stat. 12. March 14. 7°I5'S., II5°I5'.6E. Bali Sea. 289 m. Mud and broken shells. i male. 

 Stat. 38. April i. 7°35'.4S., II7°28'.6E. Near Paternoster-islands. 521 m. Coral. i female. 

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

 thin layer). 3 females. 



These specimens, though certainly pertaining to the rectacutus of the Challenger Report, 

 apparently show some differences from Alcock's description and figures. The rostrum of the 

 male which is 127 mm. long, reaches about to the middle of 3''^ antennular article, bears 11 

 teeth in addition to the small epigastric tooth and is slightly directed upward. Carapace without 

 post-rostral carina. The ridge defining the anterior part of the cervical groove proceeds in a 

 sinuous course obliquely upward towards the hepatic spine as in Spence Bate's figure 2, 

 whereas in the quoted figures of the "Illustrations" and in the "Catal. Indian Decap. Crust. 

 1906", this ridge has a more vertical direction. The 3"^ abdominal somite shows not yet any 

 tendency to become carinated. The 6* somite, measured along the upper margin, is one and 

 three-fourth times as long as the 5'^. The telson, a litde longer than the ó"» somite, and about 

 as long as the endopod of the caudal fan, is armed laterally, in front of the fixed lateral 

 prongs, only with two pairs of movable spinules, whereas the specimens, collected by the 

 "Investigator", carried three pairs in front of the fixed spines ; the terminal part of the telson, 

 posterior to the latter, appears hastate. 



The inner flagellum of the upper antennae shows the characteristic form, first described 

 by Alcock and Anderson, but both this flagellum and the outer are broken oft" beyond the 



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