I9I4-] S. Kemp : Notes on Crustacea Decapod a. 8^ 



B. Mandible without incisor-process ; last three peraeo- 



pods abnormally slender ... ... ... Lig//r {= Pur- 



Iiippolyte }. 

 B. No arthrobranchiae at base of peraeopods. 



I, Mandible with palp [carpus of second peraeopods com- 



posed of six to eight segments!. 



A. Mandibular palp three-segmenled ; supra-orbital spines 



of carapace very large [incisor-process of mandible 

 present or absent] - ... ... ... Alope. 



B. Mandibular palp two-segmented ; supra-orbital spines 



of carapace, if present, not vcr\- large [mandible with 

 incisor-process] ... ... ... ... Spt roiifucdns. 



II, Mandible without palp. 



A. Mandible with incisor-process. 



1. Carpus of second peraeopods composed of six or 



seven segments ; ultimate segment of antennular 



peduncle with movable distal plate ... ,;: ... '1 hoy. ' 



II. Carpus of second peraeopods composedo! only three 



segments ; ultimate segment of antennular 



peduncle without movable plate (normal) ... HippoJytc. . 



B. Mandible without incisor-process. 



1. Carpus of second peraeopods composed of three 

 segments. 

 a. No post-ocular spine on carapace ; carpus and 

 chela of first peraeopods short and stout, 

 dactvli of last three pairs normal. 



1. Form of body stout; lateral process of basal 



antennular segment anteriorly rounded ; 



third maxillipede with exopod ; epipods at ^q 



base of first three or four peraeopods ... Lafrciites. p . /^ 



2. Form of body very slender ; lateral process of 



basal anteiinular segment anteriorly point- 

 ed ; third maxillipede without exopod ; no 

 epipods at base of peraeopods ... ... Tozemiia. 



h. .\ post-ocular spine on carapace; carpus and 

 chela of first peraeopods slender ; dact\-lus of 

 last three pairs composed of a short basal 

 portion bearing a cluster of large teeth [third 

 maxillipede without exopod; epipods at base 

 of first four peraeopods] ... ... Gelasfocaris. 



II. Carpus of second peraeopods composed of many 

 segments. 



a. .\bdomen bearing argespines dorsally and veiU- 



rally ; carapace with 'longitudinal lateral cari- 



nae [exopod of third maxillipede present ?] ... Mimocaris. 



b. Abdomen without large spines ; carapace without 



lateral carinae. 



1. Third maxillipede with exopod; epipods at 



base of first four peraeopods, ultimate seg- 

 ment of antennal peduncle not abnormal m 

 size. 



a. Cpper antennular fiagcllum unequjily i)H-.i- ^o 



mous,.. ... •■• ... Lysnitita. %-^y 



B. Upper antennular ilagellum uniramou.s ... JlippolysinaUi.t 



2. Third maxillipede without exopod ; no epipods 



at base of first four peraeopods , ultimate 

 segment of antennal peduncle abnormal in 

 size ■•• •■■ -^^ci'^ii'^' 



As the literature dealing with the family is much scattered, I 

 have given, at the end of this paper, a list of the Indo-pacific 

 species with references. 



