352 CEYLON PEARL OYSTER REPORT. 



The present example is about half the size of those recorded by ALCOCK, DE MAN, 

 and HENDERSON. 



Dromidiopsis australiensis (HASWELL), 1882 A.Cat., p. 76. 



Localities : Chilaw Paar, Station LXIX., 8 to 11 fathoms, one specimen (a); 

 Jokkenpiddi Paar, 10 fathoms, one specimen (b). 



Description : (a) Ovigerous female, agrees fairly well with ALCOCK'S description, 

 G.I. = 16-50; C.b.-rC.l. = 0'97. (b) This is BORRADAILE'S var. bidens, 1903 (B.IX., 

 p. 576), C.I. = 9-25 ; C.b.-i-C.l. = 0'97. 



Cryptodromia canaliculata, STIMPS., 1858 A. 5, p. 142; A. Cat., pi. ii., fig. 8. 



Locality : Galle, one specimen. 



Description: Young male, C.I. = 4*25 ; C.b. -4- C.I. = 1*12. 



In this young specimen the second of the two teeth on the antero-lateral border of 

 the carapace is represented by a bluntly angular lobe. 



Cryptodromia bullifera, ALCOCK, 1899 A.5, p. 143 ; A. Cat., pi. ii., fig. 9. 



Locality : Cheval Paar, one specimen. 



Description: Young female, C.I. = 5 '50 ; C.b. + C.I. = I'OO. 



Cryptodromia demani, ALCOCK, 1899 A.5, p. 144. 



Locality : Station LTV., 10 fathoms, south of Manaar Island, two specimens. 



Description : (a) ovigerous female, (b) ad. non-ov. female. 



C.I . 5'40 5-50 



C.b. -r C.I 1-02 1-04 



I believe the present forms may be placed under the above species, which has not 

 been hitherto figured. The characteristic dorsal hepatic tooth is weak in (a), a little 

 more strongly developed in (b). The dactylopodite of walking leg 4 is apposed 

 by a quite fairly developed spine of the propodite ; the propodite of walking leg 3 

 bears a similar but smaller spine. A transverse groove runs behind the front and 

 orbits. The sternal grooves end apart, without very obvious tubercles, just behind 

 the segment bearing the chelipeds. 



Cryptodromia hilgendorfi, DE MAN, 1887 A.5, p. 145 ; A. Cat., pi. iii., fig. 11. 



Locality : Mutwal Island, Station LXVL, 30 fathoms, one specimen. 



Desciiption : Ovigerous female, C.I. = 14 '50; C.b.-rC.l. = 1'03. 



There is a slight indication of a second tooth on the antero-lateral border of the 

 carapace, behind the tooth at the antero-lateral angle. 



Remarks : BORRADAILE has in his suggestive revision of the Dromiacea (' Ann. 

 Nat. Hist.,' ser. 7, vol. xi., p. 299, 1903) included the present species in a new genus, 

 Dromides. NOBIU (p. 93) criticises this genus. 



