SQUILLOIDEA. 631 



GENUS ALIMA, Leach. 



ALIMA ANGUSTA. 



Corpus angustissimum. Pars cephalothoracis antica parte sequente plus 

 duplo longior. Abdomen gracillimum, segmentis valde oblongis, ultimo 

 triplo longiore quam latiore, postice angustiore, dentibus posticis quatuor 

 approximates et uno laterali; appendicibus caudalibus brevissimis seg- 

 mento quadruplo brevioribus. Carapax fere linear is, ad segmentum 

 thoracis antepenultimum productus, postice paululo latior, angulis 

 posticis tenuissime' productis ad abdominem non prolongatis, margine 

 postico bene transverso; medium rotundatfc emarginato non reflexo nee 

 spinuld armato, spinuld media margine paulo remotd; angulis anticis 

 spind acutis ; margine laterali spinulis minutis seriatis infra armato. 

 Segmenta abdominis lateraliter spind armata. Basis antennarum 

 internarum rostro valde longior, ramis tenuwsimis, uno longiore quam 

 basis. 



Body very narrow elongate. Anterior part of cephalothorax more 

 than twice as long as following part. Abdomen very slender, seg- 

 ments much oblong, the posterior three times as long as broad, nar- 

 rower posteriorly, four posterior teeth approximate, and one on 

 either side. Caudal appendages very short, four times shorter than 

 the segment. Carapax nearly linear, slightly broader posteriorly, 

 extending to antepenult thoracic segment; posterior angles very 

 slenderly produced, but not prolonged to line of abdomen ; posterior 

 margin directly transverse, with a rounded emargination at centre, 

 but not flexed upward nor armed with a spinule, the median 

 spinule being a short distance from the margin ; anterior angles 

 slender spini-acute ; segments of abdomen with a spine on either 

 side. Base of first antennae much longer than beak, branches very 

 slender, the longer exceeding the base in length. 



Plate 42, fig. 2 a, animal, enlarged ; b, under view of mouth and 

 feet about it; c, maxilliped; d, termination of one of the short feet 

 near the mouth ; e, one of the six posterior thoracic feet ; /, one of the 

 abdominal feet. 



