516 PROF. GILBERT C. BOURNE ON FIVE 



Macroraesenteries eight, with well-developed parietal muscles and moderately 

 well-developed longitudinal retractor muscles ; the mesogloeal folds forming 

 the muscle-banners 10-13 in number, slightly branched. Micromesenteries 

 two, one in each lateral macromesenterial interspace, small, without retractor 

 muscles, confined to the capitulum. 



Length of contracted specimen, 13-14 mm. ; diameter, 1 mm. 



Hah. He du Phare, Noumea, New Caledonia. 



Edwardsia rugosa, n. sp. (Plate 51. fig. 2.) 



Body divisible into capitulum, scapus, and physa. The capitulum not 

 distinctly marked off, finely wrinkled transversely, with eight longitudinal 

 shallow furrows corresponding to the insertions of the macromesenteries, 

 covered with a very thin epidermis. The scapus coarsely wM-inkled trans- 

 versely and covered with warty tubercles somewhat irregularly arranged in 

 eioht lonoitudinal rows, the tubercles in the upper part of the scapus tending 

 to form double rows, and some scattered in the intervening areas between the 

 rows. The whole scapus invested by a thin bright ochreous-brown epidermis. 

 The physa globose, colourless, without epidermis, with a very distinct terminal 

 depression resembling a terminal pore. 



Length, 35 mm.; greatest diameter, 3 mm. 



Huh. Sariba, China Straits, British New Guinea. 



The sinc^le specimen on which this species is founded had apparently 

 underoone a considerable amount of decomposition before being placed 

 in spirit. The external characters were fairly well preserved, but the 

 internal oroans, the tentacles, oral disc, and actinopharynx were so much 

 macerated that T was unable to count the tentacles, to recognize any micro- 

 mesenteries, or determine the extent and characters of the actinopharynx. 

 The macromesenteries were so far recognizable in sections that I could 

 determine the existence of the eight " Edwardsian " mesenteries with well- 

 developed parietal muscles, and large muscle-banners with the characteristic 

 orientation. In the debris of the tissues I could distinguish a few ova. The 

 animal was therefore sexually mature, and there can be no doubt that it is a 

 member of the genus Edwardsia. The colour and consistency of the thin 

 friable epidermis, the nature of the transverse rugae of the scapus, and the 

 arranoement of the tubercles in irregular longitudinal rows ©O'er sufficiently 

 distinct characters to justify my describing this specimen as a separate 

 species. The globose physa is also a marked feature, and, as is shown in 

 fio-. 2 it presents a circular and rather deep terminal depression ; but 

 I could not find any evidence in longitudinal sections of a porejeading into 

 the coelenteron. 



I think I am correct in describing the finely-wrinkled slightly-swollen 

 upper end of the specimen as a capitulum ; it is fairly distinctly marked off 

 from the rest of the scapus, but it may be only a somewhat modified upper 



