214 CEYLON PEARL OYSTER REPORT. 



Diogenes costatus, HENDERSON (8). 



Localities: (1) Pearl banks, Gulf of Manaar, under 10 fathoms; (2) off Foul 

 Point, Trincomalee, Station XXV., 8 fathoms. Eight specimens ; carapace of largest 

 measuring 7 millims. ; found inhabiting shells of Conus generalis and Olivella sp. This 

 species was found by THURSTON at Rameswaram. 



Diogenes miles (HERBST). (See ALCOCK, 1.) 



Locality: Welligam Bay, Station XXXI V., 2 to 7 fathoms. Two males, in shells 

 of Nassa sp. ; length of carapace, 6 millims. 



Diogenes diogenes (HERBST). (See ALCOCK, 1.) 



Locality : Stat. XV. , Periya Paar, Gulf of Manaar, 9 fathoms. Thirteen specimens, 

 in shells of Strombus marginatus, Latirus sp., Natica melanostoma, and N. sp., 

 Ranella bufonia, Oliva sp. and Tudida spirillis. Length of carapace of largest. 

 1*3 centims. 



Diogenes merguiensis, DE MAN. (See ALCOCK, 1.) 



Locality : Pearl banks, Gulf of Manaar, under 1 fathoms. Five specimens ; 

 carapace measuring 2 centims. ; in shells of Cassis glauca, Natica sp., Triton sp. 



Pagurus setifer, MILNE-EDW. (See ALCOCK, 1.) 



Localities : (1) East Cheval Paar, and other pearl banks in Gulf of Manaar, 

 under 10 fathoms; (2) south of Adam's Bridge, Station LIV., 4 to 40 fathoms; 

 (3) Welligam Bay, Station XXXIV., 2 to 7 fathoms; (4) off Mutwal Island, Station 

 LXVIII., 10 to 14 fathoms; (5) Trincomalee, Station XXL, 8 to 12 fathoms; 

 (6) Aripu coral reef, shallow water ; (7) outside pearl banks, Gulf of Manaar, Station 

 LXIIL, 50 fathoms; (8) Chilaw Paar, Station V., 9 to 11 fathoms. This is evidently 

 a common species, as it occurred in abundance at various parts of the Coast of Ceylon, 

 including Welligam and Trincomalee as well as the Gulf of Manaar. Amongst the 

 specimens were several females bearing eggs. The carapace of the largest specimen 

 measured 3 centims. , that of the smallest, 7 millims. 



These specimens were found inhabiting shells of Turbinella sp., Delphinium sp., 

 Murex haustellum. Murex sp., Murex rota, Murex trispinosum, Natica monile, 

 Trochus sp., Solarium sp., Dolium sp., Dolium marginalia, Terebra duplicata, 

 CeritJiium sp., Strombus succinctus, Strombus elegans, Strombus marginatus, Strom- 

 bus gibberulus, Pinaxia coronata, Xenophora conica, Xenophora sp., Ranella bufonia, 

 Ranella sp., Ranella granifera, Nassa glans, Turritella sp., Harpa ventricosa, 

 Ancilla ampla, Ancilla sp., Pyrula reticulata, Bulla ampulla, Tudida spirillis, 

 Oliva sp., Terebra sp., Cassis vibex, Mitra crebrilyrata. 



Pagurus asper, DE HAAN. (See ALCOCK, 1.) 

 Localities: (1) Pearl banks off Aripu and elsewhere in Gulf of Manaar, under 



