308 MR. BELL, HOR,E CARCINOLOGKLE ; 



and a single tubercle on the cardiac region, forms an equilateral triangle ; a transverse 

 elevated line crosses the posterior part of the branchial and the cardiac regions, on the 

 centre of which is the single tubercle just mentioned, and another elevated line crosses 

 the posterior part of the carapace, also having a tubercle on the centre. 



Length of carapace 5 in. 



I have no doubt whatever that Herbst's figure belongs to this species. It is consider- 

 ably broader in proportion to the length than the specimens in the British Museum, but 

 these also differ in this respect from each other. I have restored Herbst's name, which I 

 do with the less hesitation, as his is the only original figure which has hitherto appeared, 

 and we have no other original notice of the species than the short but correct and ex- 

 pressive description given by Leach. I have also given a figure of the species on account 

 of the imperfection of that of Herbst. The specimens in the British Museum, which are 

 the only ones with which I am acquainted, were brought from India by the late General 

 Hardwicke. These differ among themselves in some particulars, but, as it appears to me, 

 not sufficiently to justify a specific distinction. 



Ntjrsia abbreviata, mihi (Tab. XXXIV. fig. 5). Testa orbiculari, margine undato, 



linea elevata longitudinali, altera transversali decussata ; fronte integro. 

 Hab. in oceano Indico. Mus. Brit. 



Carapace very flat, nearly orbicular, the front slightly projecting, entire ; the margin 

 granulated and waved, forming seven slight rounded prominences, exclusive of the front ; 

 an obtuse elevated line runs down the middle of the carapace from the front to the cardiac 

 region, crossed by a transverse one which is granulated, commencing between the anterior 

 and posterior lobes of the branchial region, and crossing over the genital. The anterior 

 legs (in the female) are of moderate length, the hand not one-third longer than broad, 

 with two granulated lines on the upper side ; the fingers short, meeting at the greater part 

 of their length, but with a hiatus near the base. The external foot-jaws have the outer 

 stalk or palp considerably curved, rounded at each extremity ; the inner stalk with the 

 internal margin straight, meeting its fellow the whole length. The abdomen in the 

 female (the only sex I have seen) broad ovate, the fourth, fifth and sixth segments 

 united, and indications of them in slight transverse depressions. 



Length of carapace 0*4 in. 



Genus Nursilia, Bell. 



Char. Gen. — Testa latior quam longior, margine polygono, fronte producto. Orbita bifissa, extrorsiim 

 aperta. Fossa antennarice obliquae. Pedipalpi externi epistomati superantes, caule exteriore curvo, 

 medio dilatato; interiore elongato, margine interno arcuato. Pedes antici graciles, manu tumida, 



digitis curvis dentatis manu longioribus. Abdomen Maris ? — Fceminje valde convexum, 



articulo ultimo inter bases pedipalporum externorum producto. 



This genus has a close affinity with Ntirsia, but differs from it in the form of the pedi- 

 palps, the interior margin of which is curved, so that a space exists between them except- 

 ing at the apex ; the anterior legs are much more slender, and the form of the hand and 

 fingers is very different, resembling almost exactly that of Myrodes. 



