58 



antero-external angle, broader than ischium ; exognath not 



concealed Tylodiplax de Man 



Lateral margins of carapace convex, sometimes toothed. Che- 

 lipeds, ;it least of cf, stronger. Merus of external maxilliped 

 not auriculate, but regularly arched at outer margin, and 

 strongly notched anteriorly for the reception of the carpus; 

 exognath concealed in outer view 5 



5. Carapace more or less strongly vaulted. Lateral angles of front 



rounded Cleistostoma de Haan 



Carapace fiattened. Lateral angles of front produced .... 6 



6. Two obtuse teeth behind external orbital angle ; carapace sub- 



hexagonal, with a prominent transverse ridge across the cardiac 



region and running from side to side Camptandrium Stimpson 



Lateral margins of carapace mostly entire or with one tooth, 



convex ; carapace subcircular or roughly transversely-oyal . . Paracleistostoma de Man 



Macrophthalmus Latreille. 

 1829. Macrophthalmus Latreille. Règne an., ed. 2, t. 4, p. 44. 



In a recent paper l ) I have given a synopsis of all the known species of this genus, so 

 that a profound treatment would be useless. 



1. Macrophthalmus telescopicus (Owen). 



Stat. 258. Kei Islands. 1 <$ juv. 



The following records in the literature had previously been overlooked by me : 



Macrophthalmus telescopicus Ortmann. Denkschr. med.-natu'rwiss. Gesellsch. Jena, Bd 8, 1894, 

 p. 58 (Thursday Island). 



Macrophthalmus podophthalmus Lanchester. Proc. Zool. Soc. London, 1900, p. 760 (Singapore). 

 Macrophthalmus telescopicus Rathbun. Buil. U.S. Fish Comm. for 1903, v. 23, prt 3, 1906, 

 p. 834 (Honolulu). 



2. Macrophthalmus graeffci A. Milne-Edwards. 



Stat. 47. Bay of Bima, Sumbawa. 1 Q. 

 Stat. 64. Tanah Djampeah, Flores Sea. 1 9- 



This small species which now must be considered distinct from M. convexus Stimpson 

 is represented by two specimens, and one of these has nearly all the legs detached. 



1) Zool. Mededeel. Mus. Leiden, v. i, 191 5. p. 149. I regret to say that, besides some omissions in the full litterature upon 

 the subject, I had overlooked a subspecies of M. dilatatus viz. carens Lanchester (Proc. Zool. Soc. London, 1900, p. 759, pi. 47, f. 11) 

 from Singapore and Malacca. Shortly after the publication of my paper I became acquainted with M. saniiakani Rathbun (Proc. L". S. 

 Nat. Mus., v. 47, 1914, p. 82) from Sandakan (Borneo), allied to M. grandidieri A. Milne-Edwards. 



5S 



