256 



DISCOVERY REPORTS 



The number of segments of the cirri have been given by me (1921) for small 

 individuals. It may here be completed for larger specimens. 



Number of segments of the cirri 



The shorter cirri of both specimens agree fairly well in the number of segments. 

 In the longer cirri an increase in number with age is to be noted. In the dissected 

 specimen I observed that the segments of the posterior ramus of cirrus III had many 

 coarsely pectinated spines at the upper border. This has been previously noted by 

 Darwin in E.plicatus, Gray, 1843, who regarded it as of specific value. In E. modestus, 

 Darwin, 1854, ^ '^^^ ^^^ ^^^ such spines, this being in agreement with Darwin. 



Genus Coronula, Lamarck, 1802 

 Coronula diadema (Linne, 1767). 



For synonymy see Nilsson-Cantell, 1921, Zool. Bidrag Uppsala, vn, p. 371. 



20.1.26. South Georgia. From a Humpback whale, ?. 13-55 m. No. 387. One large specimen. 

 6. ii. 26. South Shetland Islands. From a very white Humpback whale. Two large and three 

 small specimens. 



23. vii. 26. Durban. From a Humpback whale, S. ii-^ m. No. D 3. Two large specimens. 



Distribution. Probably cosmopolitan. The species is not yet known to occur uni- 

 versally in the oceans. No finds are known from the equatorial parts of the Atlantic and 

 the Indian Oceans. 



SUPPLKMENTARY DESCRIPTION. This species is represented by fully grown individuals. 

 The young stages would be of interest to study, but none have been collected or de- 

 scribed. The fully grown specimens are well-known, and have been described by Darwin 

 (1854), Nilsson-Cantell (1921), Broch (1924), and Cornwall (1927). The specimens 

 were taken from Humpback whales, which by most authors are mentioned as hosts. 

 Probably the species is to be found on other whales (Barnard, 1924, p. 94). 



The largest specimen has a carino-rostral diameter of 53 mm., and a height of 42 mm. 



Coronula reginae, Darwin, 1854. (Plate I, figs. 5-10.) 



For synonymy see Nilsson-Cantell, 1926, Ark. Zool. Bd. XVIH a, No. 27, p. 15. 



24. ii. 25. South Georgia. From a Blue whale, ?. 22-58 m. No. 46. One specimen with some 

 young Cottchoderma aiiritum. 



24. vii. 26. Durban. From a Humpback whale, cJ. 9-55 m. No. D 4. Three specimens. (Plate I, 

 figs. 9, 10.) 



