SQUILLOIDEA. 615 



appendages largely developed; and the latter have them small or 

 wanting. The accepted genera are as follows : 



FAM. I. SQUILLIDJE. 



Rostrum sutura a carapace disjunctum. 



G. 1. LYSIOSQUILLA, Dana. Corpus laxe articulatum. Carapax laevis, antice 

 vix angustior, perbrevia, segmentis cephalothoracis fere quinque posticis carapace 

 non tectis. Abdomen latitudine e basi sensim increscens superficie non coatatum. 

 Segmentum caudale parce transveraum, apinia duabus mobilibua postice non 

 armatum. Segmentum antennale partim nudum, testa, parv.. Chelae maximse 

 digitus apinia longis annatua. 



G-. 2. SQUILLA. Corpua sat laxe articulatum. Carapax ssepissime costatus, subob- 

 cordatus, antice multo angustior, angulia anticis saepius acutis, segmentia cephalo- 

 thoracia fere quinque posticia carapace non tectis. Abdomen latitudine e basi fere 

 ad medium aensim increacena, lateribus deinde saepius parallelis, segmento poatico 

 parce transverso, spinis duabus mobilibus postice non armato. Segmentum an- 

 tennale testa raro omnino tectum. Chelae maximae digitus spinis longis armatus. 



G. 3. PSEUDOSQUILLA (Gulrin, in Collect.)* Corpus stricte articulatum. Carapax 

 Isevis, valde convexus, segmentis cephalothoracis tribua posticis carapace non tectis. 

 Abdominis segmenta parte anteriore laevia, lateribus subparallelis, segmento postico 

 oblongo vel parce transverso, spinis duabus mobilibus armato. Segmentum 

 antennale testa ssepe omnino tectum. Chelae maximae digitus spinis longis armatis. 



G. 4. CORONIS. Pseudosquillse affinis. Segmentum caudale breve, valde trans- 

 versum. Antennae internae quoad basin breviores. 



Gr. 5. GONODACTYLDS. Digitus chelae maxirnae basi tumidus, spinia brevissimis vel 

 nullis armatus ; carpus supra obsolete denticulatus et denticulis tenuibus non 

 pectinat^ armatus. 



FAM. II. ERICHTHID^E. 



Rostrum carapacis frons productus et non disjunctus. 



G. 1. SQUILLERICHTRUS, Edw. Erichtho affinis. Appendices branchiales abdo- 



minia grandes. Digitus chelae maximae intus dentatus vel spinosus 

 G. 2. ERICHTHUS, Lamarck. Appendices branchiales sive parvi sive obsoleti. 



* We have seen only a figure of a species of the genus Chloridus of Eydoux and 

 Souleyet (Voy. de la Bonite, pi. 5, f. 2, C. Latreillii), the description not being pub- 

 lished. We suspect from the figure, that the group may correspond to the "Squilles 

 Trapues" of Edwards, or the Squillse Parallelse of De Haan, Pseudosquillce, above ; but 

 we wait for published statements before recognising it as a synonyme or otherwise. 



