144 " THETIS " SCIENTIFIC RESULTS. 



narrower above than below ; interfissural spine of moderate size, 

 with a supplementary spine behind at its base ; outer angle of 

 the orbit bispinose, with an accessory spine situated externally 

 about midway between the apex and the base. 



Hepatic region prominent, with a series of small spines both 

 above and below, and two strong spines on the margin, of which 

 the anterior is much the larger. 



Branchial region beset with numerous spines and tubercles ; a 

 series of five large spines form a semicircle along the elevated 

 margin, all equidistant save the last, which is nearer ; a line 

 drawn from the fourth one of the series to the tip of the rostral 

 spine would pass over two other strong spines, one on the gastric 

 and the other on the anterior branchial region. 



There is a small blunt spine on the pterygostomial region, 

 immediately below the hepatic spine. 



The very stout basal joint of the outer antenna terminates in 

 two strong spines ; the external and larger spine is directed 

 upwards ; it possesses two accessory spinules, one on the outer 

 margin midway between the apex and the base, and the other on 

 the inner margin and in contact with the front of the orbit. The 

 inner spine is directed forward and slightly outwards ; a small 

 spinule is present near its inferior base. 



Chelipedes in adult male large, and nearly twice the length of 

 the carapace. Merus joint equal in length to the palm, twice as 

 long as the carpus, armed below with a single longitudinal row of 

 three or four, and above with two rows of six unequal spines or 

 spinose tubercles. The distal extremity bears four spines, one on 

 the outer, one on the inner angle, and two in a median line 

 superiorly ; the posterior one is rather large, and slightly exceeds 

 another spine situated at about the distal two-thirds. Carpu.s 

 Avith numerous subspiniform tubercles and a few spines ; the 

 former are irregularly distiibuted on the external and upper 

 surfaces, but they are more prominent on the ridges, as are also 

 the spines, of which there are two proximal and one distal in a 

 median line on the rounded upper border. Hand compi'essed, 

 especially in the upper fourth ; surface, including fingers, appar- 

 ently smooth, but covered eveiywhere with a fine, close bead-like 

 granulation ; palm twice as long as deep, and a little longer than 

 the mobile finger. 



Fingers with a large gap at the base when closed, tlieir inner 

 edges acute and denticulated distally, broad, rounded and trans- 

 versely ridged proximally. Ambulatory legs long, somewhat 

 slender distally, gradually decreasing in size posteriorly ; tlie first 

 pair are twice as long as the fifth pair without the tarsus. Lobes 

 uVjove the bases of all the legs except the clielipedes terminating 



