Two additional South-African Phyllopoda. H 



Leptestheria siliqva, G. O. Sars, n. sp. 



(PL 2 & 3). 



Specific Characters.— Shell of same appearance in 

 the two sexes, seen laterally, narrow oblong, about twice 

 as long as it is high, umbones but very slightly prominent, 

 and occurring near the anterior extremity, dorsal margin 

 perfectly straight and horizontal, ventral gently curved, 

 anterior extremity bluntly rounded, posterior but slightly 

 expanded, — seen dorsally, narrow fusiform, greatest width 

 occurring far in front of the middle, and scarcely exceeding 

 1 /å of the length. Valves very thin and pellucid; each with 

 about 14 rather faint lines of growth, interspaces between 

 the lines very delicately reticulate, free edges minutely 

 setous throughout. Frontal part of head securiform, being 

 produced above to an acute, recurved projection, rostral 

 prominence triangular, with the terminal spine slender, pro- 

 curved. Eyes confluent. Antennulæ of same structure in 

 the two sexes, though comparatively larger in male than 

 in female, lateral lobules about 15 in number. Antennae 

 with both rami composed of about 15 articulations. 23 pairs 

 of branchial legs present. Caudal piece narrow quadrangular, 

 forming above, at the insertion of the caudal setæ, a small, 

 heel-shaped prominence, posterior edges of caudal plates 

 slightly concaved, and minutely denticulate throughout, 

 terminal projections very strong unguiform, caudal claws 

 slender and denticulate on the concave edge. Length of 

 shell in female 6 mm., in male 7 mm. 



Remarks. — At first I was of the opinion that this 

 form might be the Estheria Macgillivrayi of Baird, which 



