Two females, collected in 1892 in the Strait of Malacca and presented by Mr. Tydeman to the Zoological Museum of the University of Utrecht, belong to a new species, much resembling Call. gigas Dana in its outer appearance and related also to Call. novae-britanniae Borr. from New Britain, to Call. kraussi Stebb. from the Cape of Good Hope and to Call. mauritiana Miers from Mauritius. Sutures of the carapace deep. Rostrum minute, measuring one-sixth of the length of the eye-stalks, broader at its base than long and rather obtuse; a still smaller, rounded projection between the eye-stalk and the antenual peduncle. Eye-stalks almost as long as basal antennular article, about twice as long as broad at their base, with subacute tips; corneae black, situated in the middle at the outer side. Second antennular article one and a half as long as thick, third article one-fourth longer than the second; flagella of equal length, a little more than one and a half as long as the peduncle. External antennae one and a half as long as the inner and as the carapace, antennal peduncle a little longer than that of the inner antennae. External maxillipeds resembling those of Glypturus Branneri Rathb. (vide: Proc. Wash. Acad. Sc. II, 1900, p. 150, pl. VIII, fig. 7), but the carpus distinctly less wide than the propodus; no spinous crest on the inner face of the ischium, propodus a little wider than long, dactylus slightly compressed.