Astacilla regina 253 



pleopod 1 S with median notch and three specialized setae; pleopod 2 copu- 

 latory stylet apically trifid. Pereonite 4 considerably longer than preceeding 

 or following pereonite. 



Astacilla cymodocea Menzies and Glynn, 1968 

 Figure 107A,B 



DIAGNOSIS 6 6.4 mm, ovigerous 9 9.0 mm. Body cylindrical, ovigerous $ 

 with pereonite 4 somewhat bulged, 6 with pereonite 4 elongate-cylindrical. 

 Shallow groove marking fusion between cephalon and pereonite 1 . Pleonites 

 fused with pleotelson, with two incomplete shallow dorsal grooves marking 

 lines of fusion anteriorly. Pleotelson lacking any shoulders, posteriorly tape- 

 red to narrowly rounded apex. 



RECORDS Florida Keys; Puerto Rico, 1.5 m, on Cymodocea sp. seagrass; Car- 

 rie Bow Cay, Belize, 1-2 m, on Syringodium Jiliforme seagrass. 



REMARKS In life, A. cymodocea is bright green, blending in with its preferred 

 substrate of seagrasses. 



Astacilla lasallae Paul and Menzies, 1971 

 Figure 107C 



DIAGNOSIS 9 3.5 mm. Cephalon with large rounded area bearing pair of 

 spines; all pereonites and two anterior fused pleonites bearing pair of short 

 submedian spines. Pleotelson with strong anterior shoulder, posteriorly tri- 

 angular, tapering sharply to narrowly rounded apex. 



RECORD Off Venezuela, 95 m. 



REMARKS This spccies is known only from the small female holotype, and 

 until a mature male and ovigerous female are found, it cannot be confidently 

 diagnosed. 



Astacilla regina Kensley, 1984 

 Figure 107D-G 



DIAGNOSIS d 6.5 mm, ovigerous 9 7.1 mm. Body strongly tuberculate, 

 many tubercles acute. Cephalon with two submedian pairs of acute tuber- 

 cles; fused pereonite 1 and pereonites 2 and 3 each with single middorsal 

 acute tubercle. Pereonite 4 with strong middorsal tubercle situated in ante- 



