297 



loug as the 2üd, 3rd a little shorter than 2nd, mediau article 

 one third longer thau thick distally. Stylocerite as iu Si/ii. neptumis. 

 Carpocerite 4,5 times longer than wide, as long as in Syn. nepiunus^ 

 upper angle of basicerite acute, lateral spine reachiug to the 

 extremity of raedian antennular article. Lateral spine of scaphocerite 

 only a little shorter than antennular peduncle, scale reaching 

 almost to the extremity of median article. 



Telson 4 times as long as the posterior margin is wide, outer 

 angles of the latter not marked ; spinules of upper surface large, 

 those of the posterior pair measuring '/t ^tie length of the telson 

 and situated immediately before the middle; proportion between 

 the length of telson and the distance of the anterior pair from 

 the posterior margin 1,3. 



Larger chela 2,7 times as long as high, relative dimensions : 

 fingers 1; total length 3,85; height 1,4. Anterior margin of the 

 palm as in Sy7i. neptunus. Fingers of the smaller chela enlarged 

 laterally as in Si/n. neptunus, but they are shorter, the relative 

 dimensions being: Fingers 1; total length 2,7; height 0,9. 



Following legs nearly as in Syn. neptunus, Proportion between 

 Ist segment of carpus and the sum of the four following 1,41. 



Relative dimensions of 3rd pair: Meropodite 2,4; carpus 1; 

 propodite 1,8. Meropodite 3,64 times as long as wide, propodite 

 5 times, with 7 spinules; dactylus one sixth of the propodite, 

 the two hooks subequal, almost parallel, the notch between both 

 hooks broadly concave at base. 



Length 10,5 mm. 



11. Synalpheus septemspinosus, n. sp. 



Station 315. AuchorageEast of Sailus Besar, Paternoster-islands. 

 Depth up to 36 M. 



A new species of the Biunguiculatus-group, distinguished by 

 the posterior margin of 6th abdominal somite being armed loith 

 seven acute teeth, one in the middle, one at the outer angles and 

 two at either side between the mediau and the outer teeth; those 

 at the outer angles are somewhat larger than the others. 



