84 



DISCOVERY REPORTS 



Ampelisca statenensis, n.sp. (Fig. 39). 



Occurrence: St. WS 88. Cape Horn. 1 ovig. ? 14 mm. 



Description. Body dorsally compressed, with a faint keel from head to pleon seg- 

 ment 3. Head truncate, lower margin concave in front. Corneal lenses 4, the upper in 

 upper angle of head, the lower on the 

 lower margin. Postero-inferior angle of 

 pleon segment 2 rounded, of 3 with a 

 small point; segment 4 with a high, 

 bluntly rounded dorsal keel. 



Antenna 1 extending to end of pe- 

 duncle of antenna 2, and about equal to 

 head plus peraeon segments 1 and 2. 

 Antenna 2 very slender, 5th joint half 

 length of 4th joint, flagellum extending 

 to about 6th peraeon segment. Mandi- 

 bular palp with linear 2nd joint. 



Peraeopods 1 and 2, dactyls longer 

 than 5th and 6th joints together, 4th pig. 39. Ampelisca statenensis, n.sp. a. Head. b. Pleon 

 joint in peraeopod I not produced over segments 3-6, with uropod 3. c. Peraeopod 5 (setae on 



base of 5th joint. Peraeopod 5 , 2nd joint 2nd J oint omitted )- 

 expanded into a subtriangular lobe ex- 

 tending downwards to end of 4th joint, obliquely truncate with hind angle rounded, 

 greatest width opposite base of 3rd joint, 4th slightly longer than 3rd, 5th large, ex- 

 panded on hinder apex, 6th as long as 5th, ovate, dactyl two-thirds 6th joint. 



Uropod 3, rami very broadly laminate, the outer ovate, outer margin spinulose, inner 

 with long plumose setae, inner ramus rather more lanceolate, but with apex truncate, 

 with plumose setae. 



Remarks. Somewhat resembling gibba, Sars, as regards the dorsal process on pleon 

 segment 4, but more like latipes, Steph., as regards peraeopod 5. The 3rd uropods are 

 very large. 



Specific name from the locality near Staten Island. 



Ampelisca brevicornis, Costa. 



Stebbing, 1906, p. 100. 



Barnard, 1916, p. 132. 



Schellenberg, 1925, p. 130 (formae dentifera, rectangula, intermedia and platypus). 



Occurrence: St. 91. South Africa. Nine specimens 6-8 mm. 



Remarks. These specimens have the high rounded carina on pleon segment 4 and 

 the broadly oval rami of uropod 3 as described by Schellenberg for dentifera and platypus 

 respectively. Postero-inferior angle of pleon segment 2 with a small tooth ; of segment 3 

 with a smaller tooth and sinus than in the typical northern form (Sars, pi. lix, fig. 1), 



