Very interesting also are the two new species of the remarkable genus So/enoccra, 

 especially Sol. Melantho, numerous specimens of which were obtained at a moderate depth, 

 from 216 to 274 meters. 



The genus Penaeopsis A. M.-Edw., with which MetapenaeusV\[.-^\a.<s,. is identical, comprises 

 at present no less than 50 species and 2 varieties, and of these species 44 and i variety occur 

 in the Indopacific. It is often difficult to distinguish these species and of a part the distribution 

 seems to be rather limited. It is probably owing to the limited range of many of these forrrre, 

 that hardly more than one-fourth of the total number of known indopacific species was captured by 

 this Expedition ; of the 1 3 species 5 or 6 are new. Of the new Penaeopsis Sibogae 2 i specimens 

 were collected at the Stations 306 and 312 in water of 247 and 274 meters; this species bears 

 a close resemblance to Penaeopsis coniger (W.-Mas.), and its variety andamanensis (W.-Mas.). 

 Of the 13 species that were collected, only 2 were already known to occur in the Archipelago. 

 Penaeopsis stridulans (W.-Mas.) is noteworthy by the stridulating organ, that is situated on 

 each side of the carapace near the middle of the posterior end of the branchiostegite ; this 

 organ, however, has also been observed by the author of this Report in two Japanese species, 

 Penaeopsis barbatus (de Haan), with which Penaeopsis akayebi (Rathb.) is identical, and in 

 Penaeopsis acclivis (Rathb.). This Penaeopsis stridulans, of which at 18 various Stations more 

 than 50 specimens were collected, was not yet known to occur in the East Indian Archipelago. 

 The 4 known indopacific species of the genus Parapenaeiis S. I. Smith have all been obtained. 

 Of the genus Atypopenaeiis, of which only one species was known, a second was discovered 

 at a moderate depth. Also one new species of Trachypenaeiis was discovered, while Trachyp. 

 ancJioralis of the Challenger Expedition was taken. 



The genus Parapenaeopsis W.-Mas. is only known from the Indopacific and comprises 

 II species and 3 varieties; 2 species were obtained, one of which is new, but Parap. sctilptilis 

 (Heller) from the Java Sea was not observed. Of the genus Penaeus s. s., represented at present 

 in the Indopacific by 1 3 species and 3 varieties, 6 species and i variety were collected. Four 

 well preserved, adult females of Pen. carinatus Dana were captured off Makassar, a species 

 that, according to Professor Alcock, attains a length of at least a foot, and near the island 

 of Saleyer five females of Pe7i. indicus H. M.-Edw., var. longirostris de Man were taken; 

 this interesting variety was discovered by Professor M.'\x Weber at Makassar during his first 

 Expedition to the Archipelago in 1888 — 1889. 



The genus Sicyonia H. M.-Edw., hitherto represented by 16 species and i variety, half 

 of which species occur in the Indopacific, was increased by 4 new forms and the total number 

 of species collected was no less than 9. Two new species. Sic. bcnthophila and Sic. fallax, 

 were taken at depths of 304 and 275 meters, but the others were captured in rather shallow 

 water and Sic. bispinosa de Haan was even taken at the surface. Except Sic. furcata Miers, 

 from the Sulu Islands, only one species of Sicyonia was known to occur in the Archipelago, 

 viz. Sic. lancifer (Oliv.), that was collected by the "Challenger" in the Arafura Sea. The 

 species of this genus seem to be rather rare, for. Sic. parvula excepted, the other eight are 

 represented in the Collection only by one or two specimens. 



Several species of Penaeidae, however, that have already been recorded from the 



