I I 2 



all the essential points, that scarcely any doubt about the identity of the two species is justified. 

 Alcock in his description states, that his S. latifcmur is "closely related" to 5. elongata, but 

 he gives no points of difference and compares his species only with S. taeniolata White. From 

 his too short diagnosis we infer that the cf has a short transverse beaded crest on the inner 

 surface of the palm, and that the back of the movable finger bears a "milled crest" consisting 

 of about 40 transverse ridges; the fmely-striated upper margin of the palm is not mentioned, 

 but something like it is indicated in his figure. 



This species has been fïrst recorded by A. Milne-Edwards from the west coast of 

 Madagascar. Ortmann afterwards collected it near Dar-es-Salaam and gave some specific 

 characters. Alcock mentioned his 5. latifcmur from the Andamans. The discovery of this 

 species by the "Siboga" on the coast of Ceram and of New Guinea considerably extends its 

 known distribution. It seems to be entirely a marine species. 



From the measurements taken by de Man, Ortmann and Alcock it appears, that the 

 ratio by which the length of the carapace surpasses the distance between the external orbital 

 angles increases with advancing age, and this is corroborated by my material : in the very 

 young cf the latter dimension even exceeds the former. 



Dimensions in mm. : 



Distance between external orbital angles . 

 .Maximum breadth of carapace .... 

 Length of carapace in the median line 

 YVidth of front between eye-stalks . 

 Posterior margin of carapace . . . . 



Length of cheliped 



Length of penultimate pair of walking legs 

 Length of meropodite 



Breadth of meropodite | 



Length of carpopodite in the median line ) 

 Length of propodite in the median line 1 

 Length of dactylus 



of penultimate pair of legs 



2. Sesarma ( Holometopus) villosa A. Milne-Edwards. 



Literature: Tesch, Zool. Med. Mus. Leiden, v. 3, 1917, p. 208, pi. 17, f. 2. 

 Stat. 64. Tanah Djampea, Flores Sea. 2 9 J uv - 



3. Sesarma (Sesarma) amphinome de Man. 



Literature: Tesch, Zool. Med. Mus. Leiden, v. 3, 1917, p. 129. 

 Stat. 179. Bay of Kawa, west coast of Ceram. 1 cf juv. on shore. 



4. Sesarma (Sesarma) gracilipes H. Milne-Edwards. 



Literature: Tesch, Zool. Med. Mus. Leiden, v. 3, 1917, p. 154. 

 Stat. 1S0. Puin Kelang, between Ceram and Buru. 1 cf, in river. 



1) Measuved undev the microscope. 



112 



