278 REV. T. R. R. STEBBING ON STALK-EYED CRUSTACEA MALACOSTRACA 



the first at about one-third of its course from the base of the finger, which also on its 

 inner side is traversed from tip to base by a curved elevation. On the outer side the 

 hand shows a broad, slightly convex surface, bounded by sharp edges, the wrist and 

 hand being denticulate on the border which is continuous with the finely serrate, 

 strongly curved outer margin of the stout finger. The left chela has slender fingers 

 seemingly longer than the palm. The second and third peraeopods have setae on one 

 margin and fine spines on the other of the seventh joint, which ends in a pellucid nail. 

 The fourth peraeopods are feebly subchelate, the fifth minutely chelate. The pleopods 

 are pellucid, very unequally biramose. The telson is unsymmetrical, each lobe edged 

 with small spinules. The carapace measured 2 '5 mm. The specific name alludes to 

 the extremely modest dimensions of the new species. 



Locality. — Pyramid Point, Ascension Island ; depth 40 fathoms ; Station 507 ; 

 June 10, 1904. 



Genus Calcinus, Dana. 



1852. Calcinus, Dana, U.S. JExpl. Exp., vol. xiii. pp. 435, 456. 



1905. ,, Alcock, Indian Decap. Crust., part ii. fasc. i. p. 51. 



1913. ,, Arata Terao, Annot. Zool. Japonenses, vol. viii. part ii. p. 357. 



In this genus the eye-stalks are long and slender, the left cheliped much larger 

 than the right, the fourth peraeopod subchelate, the fifth chelate, the pleopods 

 biramose, attached to the pleon on the left side of the second to the fifth segments in 

 both sexes, the uropods much larger on the left than on the right side. 



Judging by the species represented in the Scotia collection, the first maxillipeds 

 are slight in structure, but the second and third pairs of remarkable strength, especi- 

 ally in regard to the exopod, the trunk of which in both pairs far exceeds the endopod 

 in breadth, and in the second pair reaches far beyond the endopod's fourth joint. 

 In the third pair it does not much exceed that joint, but its basal half is much 

 broader than the corresponding part in the second pair ; in both the first joint of the 

 flagellum is much broader than the following joints, which are armed with the usual 

 setae. In the second maxillipeds the third joint of the endopod is much shorter than 

 the fourth, but only a little shorter in the third pair. In both pairs the terminal three 

 joints are abundantly furnished with setiform spines, very long and crowded in the 

 third pair, where this group of joints exceeds in length that of the third and fourth 

 joints combined. 



Calcinus talismani, A. Milne-Edwards and Bouvier. 



Plate XXVIa. 



1892. Calcinus talismani, A. Milne-Edwards and Bouvier, Ann. Sci. Nat. Zool, ser. 7, vol. xiii. p. 225. 

 1900. ,, ,, A. Milne- Ed wards and Bouvier, Crust. Decap. " Travailleur" and " Talisman," 



p. 173, pi. xxiii. figs. 15-18. 

 1905. „ ,, Alcock, Indian Decap. Crust., part ii. fasc. i. p. 164. 



The Scotia specimens agree well with the description and figures given by the 

 eminent French authors, except that in one place, by an obvious slip of the pen, they 



