2-11 RECORDS OF THE AUSTRALIAN MUSEUM. 



work of fibres, mentioned by Mcintosh, is also present, and in 

 addition there may be seen a number of rather large nucleated 

 cells, some rounded, others branched, resembling nerve cells. 

 They are scattered throughout the organ. Both dorsal and 

 ventral cirri bear some very minute papillae. 



As before mentioned, there are thirteen pairs of elytra, com- 

 mencing on the second setigerous segment. The three or four 

 anterior pairs are rather smaller than those succeeding. The 

 shape is sub-circular, the scale from the fourth segment measuring 

 seven and a half millimetres in breadth by eight in length. The 

 scar marking the point of attachment of the peduncle connecting 

 it with the dorsum is situated near the outer edge. The margin 

 is entire, but there are some very small processes arranged in a 

 row at fairly regular intervals close to the edge of the scale, there 

 being three or four such rows near the scar. A few processes 

 may occur on the edge itself. The whole scale is whitish, mem- 

 branous and slightly iridescent ; this condition being due to the 

 finely reticulate granulations on the upper surface. The fibrous 

 layer connecting the two surfaces of the elytron can be distin- 

 guished under the high power, the fibres crossing each other in 

 such a way as to form an irregular network. 



The peduncle of the scale is broad, tabular, and short. It 

 bears a number of small, almost conical capilke with a truncate 

 cylindrical extremity. There is a depression in the centre of the 

 tip (PI. xlix., figs. 5, 6). A strand of tissue is present in the 

 stalk. 



The type specimen is a ripe female dredged in five fathoms in 

 Nelson's Bay, Port Stephens, in 1882. It contained an enor- 

 mous number of ova, situated mainly in the coelome at the bases 

 of the parapodia. These ova are spherical, averaging 21 mm. 

 in diameter and are crowded with yolk granules. 



Other specimens, all dredged in Port Jackson, were also 

 examined. They varied in size from ninety mm. by twenty-nine 

 mm. to twenty-five mm. by thirteen mm., but agree in all essen- 

 tials with the above description. In one specimen the nerve 

 cord could be seen through the epidermis. All the worms are 

 too macerated for dissection. 



I propose to name the species Aphrodita hasioelli in honour of 

 Professor W. A. Haswell, a Trustee of this .Museum, who has 

 kindly assisted me with specimens and literature. 



The main characters of A. haswelli may be summed up thus: — 

 Forty-two segments ; thirteen pairs of elytra ; very short median 

 tentacle ; well developed palps and lateral tentacles ; four sessile 

 eves ; ventral seta' all alike, with somewhat pointed and slightly 



