MR. J. n. LLOYD ON THE STRUCTURE AND LIFE-HISTORY 



uiid-ventral line, almost as far distant posteriorly from the nerve- 

 ring as the latter is from the anterior end. 

 ^ The 'Hail" of the male (text-fig. 2) is coiled usually in a 

 single ring, bnt occasionally into a spiral of two rings. There 

 is an egg-shaped bursa, to right and left of which the cuticle is 

 drawn out into wing-like expn.nsions, supported by eight costal 

 papillae on each side. Van Beneden (2) states that there are six 

 or seven papillse on each side. These i)a,pillaB are pedunculate in 

 form and are arranged symmetrically in two rows. 



There is a single papilla at either end of each row ; between 

 the extreme papillae are six others arranged in three pairs. One 



pair is situated in the region of tlie cloaca, s\ud tlie two remaining 

 pairs are posterior to it. The pre-cloacal papillae are somewhat 

 longer than the remainder. Linstow (9) has figured three 

 papillae on each side of the cloaca, but after careful examination 

 of many bursie, I have failed to discover the third papilla. 



Two copulatory spicules of unequal length are present, the left 

 being approximately five times as long as the right. The average 

 length of the longer spicule is 2-125 mm. and of the shorter 

 •41 mm. 



The longer spicule is curved towards the distal end, and at the 

 beginning of the curvature there is a prominence on the convex 



