CAPEELLID^E. 225 



I do not fee] quite sure whether the four specimens from Easl of shoal buoy, 

 6 fathoms (all of them without the hind legs), also belong to M. excentrica, since 

 they seem to be rather clumsier, and their gills rather rounder, than usual. The 

 largest male has 12 joints in the tlagellum, and a pair of spines both on the head and 

 segment 2 : another male has the same also on segment 3. But evidently they do 

 not belong to any other known species of Metaprotella. 



Metaprotella problematica, Mayer. 



The washings from East Cheval Paar oysters furnish a good many examples of this 

 species which I described in 1890 (' Nachtrag zur Monographie,' p. 2G). The largest 

 male is 7 millims. long and has 16 joints in the flagellum of the first antenna; a 

 female, 5"5 millims. long, has a 15-jointed flagellum, and is accordingly older than 

 that which I had formerly described. The palmar edge of the hind legs is not 

 particularly concave ; nevertheless it is much more concave than that of Metaprotella 

 excentrica, as I correctly supposed. 



Very probably the two badly preserved young males from the Muttuvaratu pearl 

 oyster washings belong to M. 'problematica. 



Paradeutella bidentata, Mayer. 

 There are 10 examples from the East Cheval Paar oyster washings. The largest 

 male is not quite 5 millims. long and has 12 joints on the flagellum of the first 

 antenna. One female has on its head a Foraminifer of rather gigantic dimensions 

 relatively to its host. 



Paracaprella, sp. ? 

 The locality " Cheval Paar, 8 fathoms," affords a female 4 '5 millims. long, and 

 without hind legs, which belongs to the genus Paracaprella. The animal is quite 

 smooth. Flagellum of the first antenna 9-joiuted. The mandibular palp is repre- 

 sented by only one bristle. The hand of the second leg (= second gnathopod of 

 author's) has no poison-tooth. To which species this female belongs I would not 

 venture to determine. 



Monoliropus falcimanus, n. sp. (Text-figures, p. 226.) 



The genus Monoliropus, which 1 founded only a short time ago (' Siboga-Exped.,' 

 1903, p 53), on examples of the species M. agilis from Siam, now is enriched by a 

 second species. Of this new species a good deal of material is furnished from the 

 following localities: Station LVIII. (5 specimens); Shoal buoy, 4 fathoms (3 speci- 

 mens) ; Station V. (4 male specimens) ; East of shoal buoy, 6 fathoms (14 sjjecimens) ; 

 Kondatcbi Paar (3 quite small specimens) ; Periya Paar Kerrai (2 female specimens) ; 

 Cheval Paar, 7 fathoms (30 specimens); and East Cheval Paar oyster washings 

 ( I 2 specimens). 



Unfortunately, in most of the specimens the hind legs are lost. 



This new species is distinguished from Monoliropus agilis, first, by the fact that 



2 G 



