290 



carpus 1, propodite 1,6 — 1,63; meropodite 7 times, propodite 

 10 — 10,9 times as long as wide. 



In the male of the typical species the relative dimeusious of 

 3rd pair are: Meropodite 2,07, carpus 1, propodite 1,44; the 

 meropodite is 5,43 times, the propodite 7 times as long as wide. 



Leugth of adult specimens of the variety 26 mm., of the 

 typical species 33 mm. 



4. Synalpheus hilarulus, n. sp. 



Station 152. Wunoh-bay, N.W. coast of Waigeu-island. Reef. 



A new species of the Paulsoni-grou^. Frontal and autenual 

 region as in Syn. Paulsoni Nob. (vide: Coutière, in: Proc. U. S. 

 Nat. Mus. XXXVI, 1909, p. 23, Fig. 2), but the terminal spine 

 of the scaphocerite, though much longer thau the autennular 

 peduncle, does not reach to the tip of the carpocerite. Carpocerite 

 3,5 times longer than thick in the middle and exceeding the 

 antennular peduncle by two thirds of distal article. Scaphocerite 

 hardly shorter than antennular peduncle. Antennular peduncle 

 stout, 3,66 times as long as thick (at distal end of median article), 

 median article hardly longer than thick, visible part of basal 

 article almost one and a half as long as the 2nd, 3rd article 

 hardly shorter than 2nd. Upper spine of basicerite well developped, 

 though very small. 



Telson 2,44 times as long as the width of posterior margin, 

 the outer angles of which are acute, though not spinous; spinules 

 of upper surface small, the anterior pair just midway between 

 the base and the posterior margin, spinules of anterior pair almost 

 as far distant from tb e lateral margins as from the median line 

 of the telson. 



Meropodite of both chelipedes with a small, acute tooth at 

 apex of upper margin. Relative dimeusions of the larger chela: 

 Fingers 1; total length 4,6; height 1,6; this chela 2,82 times 

 longer than high and 2,46 times longer than the smaller chela. 

 Anterior margin of palm of larger chela with a small, acute 

 spine, that of the other uiiarmed. Relative dimeusions of the 



