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semicircular loop. The scaphocerite reaches just beyond the tip uf the antennular peduncle; the 

 flagellum, measuring 235 mm., is ahnest twice as long as the body. 



The external maxillipeds reach almost as far forward as the rostrum. All the thoracic 

 legs bear a rudimentary exopod, hardly i mm. long, first described by Alcock and Anderson 

 (1. c. 1891), but no more mentioned in their later papers. The legs of the i^' pair reach as far 

 as the antennal peduncle ; basis and ischium are armed each with a spine. The legs of the 

 2,"^^ pair extend just beyond the far end of 2°'^ antennular article, those of the 5"^ are a trifle 

 shorter: according to Alcock's figure 19 (1. c. 1906), the thoracic legs are slightly longer in 

 his specimens, the 5'*^ pair reaching beyond the tip of the antennular peduncles. 



Each of the two lobes of the petasma is armed at its distal end with a s h a r p spine 

 that is directed forward: these two spines are neither mentioned nor figured by Col. Alcock. 



The three females from Stat. 74 are nearly of the same size as the male, just described. 

 The rostrum that reaches to the end or just beyond the end of the antennular peduncle, bears 

 10 or II teeth besides the epigastric tooth. As regards the other characters of carapace and 

 abdomen, they fully agree with the male. The telson is a trifle shorter than the inner uropod 

 and closely resembles that of the male. 



The inner antennular flagellum is a little longer than the peduncle; the outer is one- 

 third shorter, the thickened proximal part is twice as long as the thin distal end. The outer 

 antennae resemble those of the male. 



As regards the thoracic legs that are as long as in the male and also provided with 

 rudimentary exopods, it may be remarked that, according to Alcock (Cat. Indian Deep-Sea 

 Crust., 1901, p. 18), in the female the basis of the 2°<^ pair should be armed with a spine: 

 in the females of this collection this spine is wanting. The somewhat younger female from 

 Stat. 38 agrees with the preceding. 



General distribution: Off Matuku, Fiji Islands (Spence Bate) ; Philippine Islands, 

 betwee_n Bohol and Zebu (.Spence Bate) ; off Pulicat (Madras), South of Port Blair, (Andamans), 

 North of Xorth Andaman Island (Alcock). 



Atypopenaeus Alcock. 



The genus Atypopenaeiis hitherto with certainty comprised only one single species, Atyp. 

 coinpressipes (Hend.), observed off the Madras coast at a depth of 1 2 fathoms and in the Gulf 

 of Martaban. This species was captured by the "Siboga" in the Bay of Bima, in 55 meters of 

 water. A new species was discovered by this expedition in the same seas, off the coasts of 

 Timor, Flores and Sumbavva, at three Stations in water of 216, 247 and 274 meters. 



36. Atypopenaeus compressipes (Hend.). 



Penaeus compressipfs J. R. Henderson, in: Trans. Linn. Soc. London, Zool. Ser. 2, Vol. V, 



1893, p. 450, Pi. XL, Fig. 21, 22. 

 Atypopenaeus covipressipes A. Alcock, Catal. Indian Decap. Crust. Part III. Alacrura. Fase. i. 



1896, p. 45, PI. IX, Fig. 29, 2(ja. 



Stat. 47. April S'12. Bay of Bima, near south fort. 55 m. Mud with patches of fine coral 

 sand. I male. 



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