234 DISCOVERY REPORTS 



distinct on the side of the test ; the subanal part is sometimes quite reduced, sometimes 

 very distinct. There is thus much variation in the development of the fascioles. 



Both male and female specimens are found in this material, and, as was to be expected, 

 the females have the paired petals transformed into deep marsupia, this species being 

 thus also brood-protecting. The embryos contained in the same marsupium are in all 

 stages of development, from newly laid eggs to fully formed young ones ready to leave 

 the marsupium. The breeding thus appears to go on continuously, i.e. so long as the 

 breeding season lasts ; but of its duration we know nothing. 



The young ones ready to leave the marsupium are already distinctly elongate, 3 mm. 

 long, and have the peripetalous fasciole quite clearly developed. Pedicellariae have not 

 yet appeared, but the first sphaeridia have been formed. 



A specimen of 8 mm. length is characteristically elongate (6 mm. broad), almost rect- 

 angular. The circumlateral fasciole is well developed, but the transverse fasciole has 

 only just begun to appear (cf. the development of the fascioles in the young Abatus 

 cavernosiis, as described in my report on the Echinoidea of the Swedish South Polar 

 Expedition, pp. 75-83). The periproct is in this specimen still close to the apical system. 

 Genital pores have, of course, not yet appeared. A couple of globiferous pedicellariae 

 found on the aboral side, and a rostrate pedicellaria found on the posterior end of the 

 test, make the identification of this specimen as a young Parapneustes cordatus quite 



certain. 



One specimen, a male, is remarkable in having four genital pores, the madreporite 

 also having a genital pore. The labrum is generally more pointed and narrow than shown 

 in Koehler's pi. xvi, fig. 26; but both forms may occur, as shown in Plate III, figs. 3, 4, 

 and it is not a sexual difference, as I find both the broad and the narrow form to occur 

 in male specimens. 



Family SPATANGIDAE 



Echinocardium connectens, Mortensen 



(Plate IV, figs. 9-10) 



Echinocardium connectens, Mortensen, 1933. The Echinoderms of St Helena {other than Crinoids). 

 Papers from Dr Th. Mortensen's Pacific Exped. 1914-16, Lxvi (Vid. Medd. Dansk Naturh. 

 Foren., 93), p. 469. 

 St. 299. 4. ix. 27. Tarrafal, San Antonio, Cape Verde Islands, 7-1 1 m. i specimen. 

 This specimen is, at any rate, very closely related to the St Helena species, E. con- 

 nectens, with which it agrees in the character of the frontal ambulacrum, the absence of 

 larger spines (tubercles) above the ambitus, and in the character of the triphyllous 

 pedicellariae. Unfortunately only triphyllous pedicellariae are found and these even 

 are exceedingly scarce. 



On account of the very scarce and insufficient material hitherto known of £■. connectens, 

 and with only a single specimen in hand of the present form, I do not like to state 

 definitely that it is really identical with the species from St Helena, but I have little 

 doubt about their identity. The specimen is 20 mm. long, 20 mm. broad and 14 mm. 



