150 



The description and figures are taken chiefly from female 

 specimens ; the males I possess, which appear to be full grown, 

 are much smaller. 



This genus bears much external resemblance to Chitin- 

 opsis, Whitelegge. 



Gulf St. Vincent, shallow water. 



Moruloldea, n. gen. 

 Moruloidea lacertosa, n. sp. 



Plate vii., figs. 1 to 10. 



The body is expanded, moderately convex, the epi- 

 mera of the thorax extending obliquely, and form, with their 

 segments each side, a longitudinal shallow groove, which 

 converges a little behind, continuing a similar groove ex- 

 tending round the pleon. 



The head is short, with a small depressed rostral pro- 

 jection; much narrower than the first segment of the thorax; 

 nodular and abruptly declivous in front. 



The eyes are small. 



The first segment of the thorax is broad and longer than 

 any of the others which follow, rather nodular, its sides 

 showing three faint tubercles on each margin ; it is depressed 

 anteriorly rather deeply; the extreme antero-lateral angles 

 beneath the eyes are bifid or emarginate. Of the epimera of 

 the following segments the fourth is longer fore and aft 

 than the rest, the last is very short; they (six) are slightly 

 accentuated at each posterior angle by a slight nodule or 

 tubercle. 



The anterior portion of the pleon, which is produced to 

 a pointed plate laterally, is short, with the sutural lines 

 scarcely showing. The posterior portion is dome-shaped and 

 tuberculate, with its anterior angles also produced to points, 

 the sides are slightly insinuate, thin, ending posteriorly in 

 acute teeth, which do not reach the level of the sides of the 

 posterior notch, the margins between which are insinuate. 

 The notch is oblique in direction, rather deep, rectangular, 

 its base slightly convex. 



The basal antennular joints are not much expanded : 

 they are uneven, rounded, and project very little beyond the 

 head; the distal end of the first joint is not notched, or 

 scarcely so; the second joint is short, small, and has a back- 

 ward direction; the third joint is narrower and longer than 

 the second; the flagellum short and slender, with 11 joints. 



The antennae are unusually large, all the joints of the 

 peduncle are robust, the second has a distal obtuse tooth 



