2 12 



but in a less degree turned upward than in the female from Amboina, may be foliowed to 

 the middle of the carapace. The telson has a different form, its posterior margin (0,78 mm.) 

 measures just one-fourth the length (3,12 mm.), but anteriorly the telson appears broader, 2,6- 

 times as broad (2,04 mm.) as the posterior margin; the spinules of the upper surface are inserted 

 a little more backward, the proportion between the length of the telson and the distance between 

 its posterior margin and the anterior pair of spinules being as 1 : 0,36. 



Otherwise as in the typical species the carpocerite appears longer, extending beyond 

 the antennular peduncle by one-half the third article. 



The large cheliped is missing, the following legs are as in the typical species. 



\b. Synalpheus carinatus (de Man) var. ubianensis de Man. 



J. G. de Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1909, p. 111. 



Stat. 99. June 28/29/30. 6°f.$ N., i2o°26'E. Anchorage off North-Ubian. 16 — 23 m. Litho- 

 thamnion-bottom. 1 ova-bearing female. 



Stat. 220. November 1/3. Anchorage off Pasir Pandjang, West coast of Binongka. Reef. 1 ova- 

 bearing female and 1 younger male. 



It is again because of the size of the eggs that these specimens are considered as a 

 distinct variety: the ova are namely very small, 0,4 — 0,48 mm. long, and a little less thick. 

 The female from NortlvUbian is 2 1 mm. long, the two other specimens are of a somewhat 

 smaller size. Rostrum and orbital spines as in the typical species, the rostrum just reaching 

 beyond the second antennular article, but the carinae of the orbital spines are inconspicuous 

 and the rostral carina is not notched. 



Telson in the female from Stat. 99 4 7 / 16 -times, in that from Stat. 220 4,8-times as long 

 as the posterior margin is broad ; in the former the proportion between the greatest width near 

 the base and that of the posterior margin is 2,6, in the specimen from Stat. 220 just 3. The 

 anterior pair of spinules of the upper surface are inserted just in front of the posterior third, 

 the proportion between the length of the telson and that distance from the posterior margin 

 being in the female from North-Ubian 2,84, in the other 2,6. Thoracic legs as in the typical 

 species, but the second, third and fourth carpal segments of the second legs are of equal 

 length, the second being hardly longer than the third or the fourth. 



II. Neomeris group. 



f5. Synalpheus neomeris (de Man). 



Alpkeus minor, var. neptunus Dana, J. G. de Man, in: Journal Linnean Soc. London, XXII, 



1888, p. 272. 

 Alpkeus neomeris J. G. de Man, in: Zoolog. Jahrb. IX. Abth. f. Syst. 1897, p. 734 (partim). 

 Synalpheus neomeris G. Nobili, in: Buil. Scientif. France et Belgique, XL, 1906, p. 25. 

 ? Synalpheus neomeris H. Coutière, Les "Alphéidae", 1899, p. 259, fig. 318 and in: Alpheidae 

 Mald. and Laccad. Archip. 1905, p. 869, PI. LXX, fig. 1 and in: Buil. Soc. Philom. Paris, 

 1908, p. 5. 

 Nee: Synalpheus neomeris J. G. de Man, in: Abhandl. Senckenb. Naturf. Ges. XXV, 1902, p. 891. 



So 



