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half as long as the propodus, one-third the length of the merus, not broader than thick, slightly 

 curved, not flattened, simple. 



Remarks. Alpheus djcddcnsis Cout. from the Red Sea is a closely related form, in 

 which the carapace is also pubescent. It is a species of much larger size, of which I have 

 treated in: Mémoires Soc. Zoolog. France, 1909, p. 160 — 163, PI. VIII, figs. 25, 26. 



f41. Alpheus savuensis de Man. 



J. G. DE Man, in: Notes from the Leyden Museum, Vol. XXX, 1908, p. 110. 



Stat. ij. March 30/31. Sailus ketjil, Paternoster-islands. Depth 27 m. and less. Coral and 



coralsand. 1 egg-bearing female. 

 Stat. 58. April 25. Anchorage off Sebu, Savu. Reef. 1 male. 



Another new species of small size of the Brevirostris group, closely related to A. pu- 

 bescens de Man. Male 18,5 mm. long, the female 17 mm. Carapace al most quite glabrous. 

 Rostrum acute, in the male just as long as broad at its base, in the female a little longer 

 than broad, extending in the male to the middle, in the female just beyond the middle of the 

 visible part of i st antennular article, projecting with four-fifths of its length beyond the rounded, 

 anterior margin of the slightly prominent, unarmed, orbital hoods ; width of the orbital region two- 

 thirds that of the anterior margin of the carapace. The rostral carina, which in the male is 

 continued, though inconspicuously, for a short distance beyond the base of the orbital hoods, 

 in the female not, appears rat her sharp between the orbits, from which it is separated by 

 deep and broad grooves; the interorbital part of the carina is concealed, in a lateral view, 

 by the orbital hoods and appears nearly straight, while the rostrum projects straightly fonvard. 

 Second antennular article in the male twice, in the female a little more than twice as lone as 

 thick (proportion in the female 2,25), a little — in the male one-fourth or one-fifth, in the 

 female one-third — longer than the visible part of first article, third article a little shorter 

 than that visible part. Acute point of stylocerite curved inward, not s p i n i f o r m as is the 

 case in most other species of this group and extending to the distal sixth of the visible part 

 of first article. Spine on the basicerite small, shorter than the stylocerite. Carpocerite projecting for 

 a short distance — one-third of the 3 ld article - - beyond the antennular peduncle ; scaphocerite 

 as long as the carpocerite, not longer, resembling that of A. puöesceus, its greatest width two- 

 fifths of its length, outer margin concave, terminal spine and blade also as in that species. 



External maxillipeds reaching as far forward as the antennular peduncle-, penultimate 

 joint almost as thick as long; terminal joint 2,5-times as long as the penultimate and, in a 

 lateral view, 3,5-times as long as broad, terminal setae twice as long as this joint. 



Merus of the large cheliped of the male (in the female both legs of the i st pair are missing) 

 2,5-times as long as broad, upper margin unarmed at the apex, infero-external feebly serrulate, 

 infero-internal with a small, acute tooth at the far end, preceded by one or more short spinules 

 (the margin presents a few obtuse prominences, one of which is tipped with a very small spinule, 

 on the other ones the spinule is apparently lost). A small acute tooth at the infero-internal 

 angle of the carpus. Chela similar to that of A. puóesceus, high, 2,55-times as long as high 



260 



