106 W. BLAXLAND EENHAM. 



is situated just behiud and slightly laterad of the inner chsetse. 

 These probably have some copulatory significance. They are, 

 however, diflferent from the " pits" above mentioned. Internally 

 in this segment is a low but rather extensive muscular promi- 

 nence occupying the whole length of the segment, which, I 

 presume, is the wall of some structure opening by the above- 

 mentioned pore. 



Turning now to the internal anatomy, there are the 

 following points to be noted. As in other species of the genus, 

 certain of the anterior septa are very much thickened, viz. the 

 septa 9/10, 10/11, 11/12, 12/13, and 13/14; the next two septa 

 are also thick, but less than the foregoing five. In front of 

 the first of these thickened septa, the viscera are wrapped 

 together by a delicate membrane, due no doubt to the thin 

 septa of these segments being pushed backwards by the large 

 gizzards; owing to the teuuily of the septa here, and to the fact 

 that they are ruptured in merely turning the organs aside, it is 

 difficult in a dissection to trace them out. The first septum 

 in the body is distinct, and separates Segments iv and v; con- 

 sequently septa 5/6, 6/7, 7/8, and 8/9 are represented by the 

 enveloping membrane just referred to. 



The Alimentary Tract. — Amongst the internal organs 

 the most noticeable feature of novelty is presented by the 

 intestine. The two gizzards, characteristic of the genus, are 

 of large size, and appear to belong to the Segments v and vi. 

 The oesophagus is narrow, and provided with the usual three 

 pairs of " calciferous glands " lying in Segments xv, xvi, and 

 XVII. Whether carbonate of lime is present, as has been deter- 

 mined for other species, I am not in a position to affirm, as I 

 did not think it worth while to explore the glands. As is 

 frequently the case, the first gland on either side is the 

 smallest. In the genus Benharaia the wall of these glands 

 presents a variety of patterns, owing to its folding ; these have 

 not been figured carefully, but have been described by 

 Michaelsen and by Horst as horizontal folds in some cases, 

 vertical folds in others. But in the present species the foldings 

 are very elaborate, so that the surface of the glaud, as well as 



