32 ALLAN HANCOCK ATLANTIC EXPEDITION 



REPORT 



3. Anterolateral margins of rostral plate acute; raptorial dactylus 

 armed with ten teeth ; 22 submedian denticles in row across mid- 

 line of telson L. hancocki, n. sp. 



Anterolateral margins of rostral plate rounded ; raptorial dac- 

 tylus armed with eight teeth; 15 submedian denticles in a trans- 

 verse row on ventral surface of telson . . . L. antillensis, n. sp. 



Lysiosquilla hancocki, new species 

 Plate 8 



Holotype: Female, Sta. A27-39, Cubagua Island, Venezuela, April 

 5, 1939, 2-5 fms, collected by VELERO III (AHF 3918). 



Measuretnents: The female holotype is 21.0 mm in total length. 

 Other measurements: carapace length, 3.1 mm; length rostral plate, 0.9 

 mm; width rostral plate, 1.5 mm; length telson, 1.5 mm; width telson, 

 2.6 mm. 



Description: Eyes subglobular, cornea slightly overhanging lateral 

 margins of stalk ; eyes not extending to end of antennular peduncle. 



Rostral plate subquadrate, much broader than long, lateral margins 

 subparallel, anterolateral angles rectangular ; anterior margins concave, 

 sloping forward to obtuse, unspined, apex. 



Antennal scale short, as long as ocular peduncle ; antennal protopod 

 without papillae. 



Carapace short, one-seventh total length, without carinae or spines; 

 gastric grooves distinct, cervical groove indicated on lateral plates only; 

 carapace rounded anterolaterally and posterolaterally. 



Epipods present on first four thoracic appendages; mandibular 

 palp absent ; propodus of fourth thoracic appendage almost twice as 

 broad as long, twice as broad as propodi of third and fifth thoracic ap- 

 pendages. 



Raptorial dactylus armed with 10 teeth on inner margin; outer mar- 

 gin of dactylus a simple curve, with a strong basal notch followed by 

 a low, obtuse lobe ; raptorial propodus armed with four movable teeth, 

 second much the smallest, on inner, proximal margin, and a row of pec- 

 tinations on outer, upper margin; dorsal ridge of carpus obscure, un- 

 divided, ending in a blunt tooth. 



Thoracic somites without carinae; lateral margins of last three 

 thoracic somites subtruncate, slightly concave laterally; inner branch 

 of walking legs circular on appendages of sixth and seventh thoracic 

 somites, more ovate on the appendage of the eighth somite. 



