ZOOLOGISCHE MEDEDEELINGEN 



UITGEGEVEN VANWEGE 

 's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE 



Deel Y. 



te 

 LEIDEN 



Aflevering 3. 



XI. — DIAGNOSES OF SOME NEW SPECIES OF PENAEIDAE AND 

 ALPHEIDAE WITH REMARKS ON TWO KNOWN SPECIES OF THE 

 GENUS PEN AEOPSIS A. M.-EDW. FROM THE INDIAN ARCHIPELAGO. 

 BY Dr. J. G: DE MAN. - IERSEKE (HOLLAND). 



Penaeopsis Lysianassa (de Man). 



Penaeus Lysianassa J. Gr. de Man, in: Journal Linnean Soc. London, 

 Zoology, XXII, 1888, p. 290, PL 19, figs. 1—11. 



1 young male collected 1892 by Mr. Herbst at Bagan Api Api, Sumatra. 



2 young males and 2 young females collected October 1911 by Dr. P. 

 Buitendijk in the road of Samarang. 



The specimens were compared by me with three full-grown cotypes 

 from the Mergui Archipelago, 2 males and 1 female, preserved in my 

 private collection. The examination revealed the remarkable fact, still 

 unknown, that, like in Penaeopsis spinulicauda Stebb. from Durban Bay, 

 the lateral margins of the telson are armed with numerous little spines up 

 to a short distance from the acuminate tip; they seem to be 20 — 25 in 

 number in the adult species, on the posterior half of the telson, and to 

 increase in length from before backward, the posterior being l / 4 to 

 Y 3 mm. ,long. 



Penaeopsis intermedia (Kish.) var. anchista n. *) 



Penaeus intermedins K. Kishinouye, Journal of the Fisheries Bureau, 

 Yol. VIII, N°. 1, Tokyo, 1900, p. 21. 



1 male and 1 female from the Kei-islands, Wertheim Expedition. 



2 females from Ternate. 



1 very young specimen, collected by Mr. Rutten at Balikpapan, 

 East Borneo. 



1) uy%i<TT0ç, = related, allied. \^ 



(.29—111 - 1920) 



