224 CEYLON PEARL OYSTER REPORT. 



Gulf of Manaar, Station V., Chilaw Paar, 10 fathoms: Metaprotella excentrica, 

 Mayer; Monoliropus faldmanus, n. sp. 



East of shoal buoy, Pearl Banks, 6 fathoms: Metaprotella excentrica, Mayer; 

 Monoliropus faldmanus, n. sp. 



Kondatchi Paar, 5 fathoms: Monoliropus faldmanus, n. sp. 



Periya Paar Kerrai, 9 fathoms: Metaprotella excentrica, Mayer; Monoliropus 

 faldmanus, n. sp. 



Muttuvaratu pearl oyster washings, 8 fathoms : Metaprotella problematica, 

 Mayer (?) ; Monoliropus, sp. (?). 



East Cheval Paar, 6 fathoms : Metaprotella excentrica, Mayer ; Monoliropus, sp. (?). 



Cheval Paar, 7 fathoms: Metaprotella excentrica, Mayer; Monoliropus fald- 

 manus, n. sp. 



From pearl oyster washings, East Cheval Paar, G fathoms : Metaprotella. excen- 

 trica, Mayer; Metaprotella problematica, Mayer; Paradeutella bidentata, 

 Mayer; Monoliropus faldmanus, n. sp. 



Cheval Paar, 8 fathoms : Paracaprella, sp. (?) 



Notes on the Species. 



Metaprotella excentrica, Mayer. 



This species, already reported from the East Indies, is represented by specimens 

 from various localities. 



A. From Station V., north end of Chilaw Paar, 10 fathoms. The heads, antennae, 

 and hacks of the larger examples are covered -with small mussels. The largest male 

 is over 13 millims. long, and the flagellum of the first antenna has 14 joints; the 

 tubercle at the base of the antenna is very variable. The old males do not possess 

 the pair of spines on the back of segment 3 ; a younger male, however, possesses it, 

 besides an unpaired spine on the back of segment 2. The only female (with 13 joints 

 in the flagellum) has the same spines as this male, but the pair of spines on segment 2 

 is very conspicuous ; ventro-laterally on the end of segment 4 is an obtuse ridge. 

 The spine at the base of the second antenna in the female is small, and it is entirely 

 wanting in the young males. For the rest, the examples agree well with my 

 former description (' Nachtrag zur Monographic' 1890, p. 25). 



B. From the East Cheval Paar oyster washings there are some good sized males, 

 one female with eggs in the brood-pouch, and numerous young ones. The large 

 males are provided also on segment 3 with a pair of sjjines of quite variable length. 



C. From East Cheval Paar, 6 fathoms, the examples all have their hind extremities 

 missing. Of the four females, two carry eggs in the brood-pouch ; the pair of spines 

 on segment 3 is not always present. 



D. Periya Paar Kerrai affords only a young female ; Cheval Paar, 7 fathoms, only 

 a young male and a young female. 



