182 



Length of carapace, 21 mm. 

 Breadth ,, „ 22 mm. 



Length of cheliped, 28 mm. 

 ,, first leg, 28 mm. 

 St. Vincent Gulf.- Dredged by Dr. Verco. Mr. W. J. 

 Kimber. 



Types in Adelaide Museum. 



Order MACRURA. 



Tribe, THALASSINIDEA. 



Family, Callianassid.e. 



BorradaUe, Ann. and Mag. Nat. Hist. Ser. 7, vol. xii. 

 Genus, Callianassa, Leach. 

 Sub-genus, CaUichirus, Stimp. 

 Callianassa aequimana, n. sjd. PI. xxiv., iigs. 1-8. 



The carapace is considerably less than one-third the 

 length of the body, excluding the telson, mostly smooth and 

 firm, a little punctate on the protogastric region, somewhat 

 elevated in the median regions. The cervical groove is well 

 marked, its posterior border reaches back a little further than 

 the middle of the carapace. A little behind this the cara- 

 pace is marked by a transverse suture, which soon sends a 

 branch forward in a straight line to the antennal notch and 

 another backward to the posterior margin ; the transverse 

 suture is continued on to the branchiostegite, where it ends 

 in numerous small areolae ; from this point lines extend 

 forwards and backwards, the forward line takes a slightly 

 oblique and sinuous course to a point below the antennal 

 notch ; in crossing the subhepatic region it is ridge-like, below 

 this ridge are also numerous areolae. 



The front has a very slight rostral projection, and behind 

 it two short longitudinal grooves, more or less well marked, 

 diverge, and are soon lost, more j^rominent are projections of 

 the margin below the ocular peduncles; the antennal notch 

 has a small lunate suture or ridge just behind it, the antero- 

 lateral angles are rounded ; in some specimens a short furrow 

 runs obliquely on the side of the metagastric region and the 

 upper portion of the hepatic region is somewhat uneven and 

 punctate ; the branchiostegites scarcely project behind. 



The postero-lateral expansions of the pleon segments are 

 small ; the first segment is anteriorly narrowed and subcylin- 

 drical, its pleura being obsolete : the second segment, which 

 is the longest, is produced postero-laterally to a greater degree 

 than the three which follow. The first, third, and fifth seg- 

 ments are subequal in length, and the fourth shortest, the 

 sides of the third, fourth, fifth, and sixth segments have short 



