Antennular peduncle a little shorter than the antennal scale, 3 ,d article half as long as 2 nd . 

 The external maxillipeds reach in the largest specimen but one to the distal extremity of 2 nd 

 antennular article, in the other still younger specimens they are a little shorter. The i st legs 

 reach in the largest specimen just beyond the antennal peduncle and are bispinose, both the 

 basi- and the ischiopodite being armed with a spine ; legs of the 2 nd pair unispinose, those of 

 the 3 rd unarmed. The 5 th legs, that bear an exopodite, extend almost to the far end of 2 nd 

 antennular article. We may therefore conclude that the sea between Ceram and New Guinea 

 is inhabited either by Pen. barbatus (de Haan) or by a closely allied species. 



6. Parapenaetis fissurus (Bate). 



Penaeus fissurus C. Spence Bate, Report Challenger Macrura, 188S, p. 263, PI. XXXVI, fig. 1. 

 Parapenaeus fissurus J. G. de Man, Siboga Exp., Monogr. 39^, Part I, Family Penaeidae, 

 191 1 (text), p. 79, 1913 (plates), PI. VIII, fig. 25 <7, b. 



Stat. 306. February 8. 8° 27' S., 122 54.5 E. Lobetobi-strait. 247 m. Bottom sandy mud. 1 male. 



This male that carries a Bopyrid in the left branchial chamber, is 110 mm. long. As 

 a rare exception the rostrum reaches, like in the young male long 100 mm. from Stat. 302 

 (1. c), to the middle of the 3 rd joint of the antennular peduncle, which is just as long as the 

 antennal scale; the rostrum is somewhat curved upward at the tip and bears besides the 

 epigastric tooth frve rostral teeth like in fig. 25 a (1. c), of which the foremost is almost 3-times 

 as far distant from the apex of the rostrum as from the apex of the penultimate tooth. 

 I observe, however, still the almost microscopical tracé of a 6 th tooth a little farther distant 

 from the apex of the rostrum than from that of the foremost tooth ; such a tracé is also visible 

 in fig. 25 a of my work. 



7. Parapenaeus sp. PI. I, fig. 5. 



Stat. 47. April 8/12. Bay of Bima, near south fort. 55 m. Bottom mud with patches of fine 

 coral sand. 1 very young specimen. 



In its outer appearance this specimen much resembles Parap. Investigatoris Alc. & 

 Anderson (A. Alcock, Catal. Indian Decap. Crust. Part III. Macrura. Fase. 1. Calcutta. 1906, 

 PI. VI, fig. 17), but it differs at first sight by the branchiostegal spine being very small 

 and placed at the antero-inferior angle of the carapace. This specimen is 16,1 mm. 

 long, the carapace, rostrum included, being 4,4 mm. long, the abdomen 11,7 mm. The rostrum 

 that just reaches beyond the eyes, is 1 + 6-dentate, the epigastric tooth, the apex of which is 

 as far distant from the i st rostral tooth as the latter from the 3 rd , has nearly the same size 

 as the i st tooth of the rostrum; the length of the rostral teeth, i. e. the distance between their 

 apices, regularly decreases from the 2 nd to the last, the distance between the apices of the i st 

 and the 2 nd tooth is, however, a little shorter than that between those of the 2 nd and 3 rd ; the 

 6 th is as far distant from the tip of the rostrum as from the apex of the penultimate tooth 

 and the line uniting the apices of the six teeth curves slightly downward. The rostrum, 1,2 mm. 

 long, appears 4-times as long as broad at its base. Posterior to the rostrum the carapace is 



SI1SOGA-EXPEDITIE XXXIX a*. 2 



