CALIGOIDEA. 1375 



a little nearer the medial line. Between the two there is a minute 

 coloured spot. 



The species below was found with the Nogagus validus, and was at 

 first supposed to be the female to that species. 



We judge from the description of Nogagus gracilis that it may 

 belong to this genus. Kroyer describes and figures a specimen, which 

 he refers to as young of Lcemargus muricatus, with a query.* It is 

 apparent that the animal has conspicilla, besides other characters 

 of our genus Specilligus, being similar in the joints of the body, the 

 caudal stylets, etc. 



Specilligus curticaudis. 



Feminae? — Carapax oblongo-ellipticus, anticd arcuatus. tegmentum 

 secundum ad latera posticd productum; tertium quarto latius et dimidio 

 carapacis parce latius. Pedes secundi paris crassissimd clieliformes, 

 digito immobili brevi truncato, digito mobili obtuso. Abdomen 2-arti- 

 culatum, segmento antico paulo oblongo, angulis posticis truncatis et 

 setam minutam gerentibus, segmento postico brevi, ano prominente; 

 stylis parvidis, triangidatis, ad angulos insitis, anum non superantibus, 

 setis tribus, plumosis. 



Carapax oblong-oval, arcuate in front, second segment with the sides 

 prolonged backward, third broader than fourth, and a little broader 

 than half the carapax. Anterior antenna setigerous at apex, the 

 setae rather long and plumose. Feet of second pair very stout che- 

 liform, the thumb short and truncate, the finger obtuse. Abdomen 

 two-jointed, anterior segment a little oblong, posterior angles trun- 

 cate, and bearing a minute seta; posterior segment short, anus 

 prominent, stylets triangular, situated on the angles, not extending 

 beyond the anus, setae three, plumose. 



Plate 95, fig. 6 a, dorsal view, enlarged; b, eyes; c, under view 

 (showing a, frontal margin ; b, anterior antennae ; c, sucker disk ; d, 

 posterior antennae ; e, buccal trunk and maxilla ; f, first pair of feet ; 

 g, second pair of feet ; 7i, first pair of natatories) ; d, e, hand of second 



* Tidsskr., i. 1837, PI. 5, f. D. a. 





