JOSEPH A. CLUBB. 



But the most interesting character of these specimens from the Falkland Islands 

 is the presence of " brood pouches." Immediately below the pseudoacroragi is a well- 

 marked constriction of the body-wall, also present, it is interesting to note, in Paran- 

 theopsis cruentata. In this constriction, in the species under consideration, specimens 

 were found possessing sixteen pores, one pore to each line of verrucse, leading into 

 distinct invaginations of the body-wall, forming characteristic " brood pouches " in the 

 coelenteron. These " brood pouches " agree in all essential points with the arrangement 

 shown to be present in the 'Southern Cross' specimens (3, p. 299). The drawing 

 (PI. 3, Fig. 16) shows a section of the body-wall, passing through one of these pores, 

 and the " brood chamber " into which it opens. The three layers of the body-wall may 

 be distinctly traced as shown, each of them much thinner the mesogloea markedly so. 

 Usually each " brood chamber" contains two embryos only, and in the section figured 

 they are well advanced, showing several of the mesenteries complete and others well 

 developed. Dissections were made so that, looked at from below, the sixteen " brood 

 pouches " were seen like so many miniature grapes, lying quite regularly in the body 

 cavity, between the mesenteries. In diameter they average about 3 mm. 



In the short description of the species by Carlgren (1, p. 20) no mention of 

 them is made. It is somewhat remarkable if none of Carlgren's specimens possess 

 these " brood pouches," and possibly re-examination may show their presence in some. 



CRIBRINA HERMAPHRODITICA. 



Runodes hermaphroditicus Carlgren, Hamburg. Magalhacns. Sammelreise, Zoanth. (1898), p. 23, Fig. 18, 

 1898. 



About forty specimens from "Enderby Island, Auckland Islands, 19. 3. 04" of 

 sizes ranging from 3 cm. to 2 cm. in height of column. In some cases the oral disc 

 and tentacles are fully exposed, in others the animals are contracted so that the 

 tentacles are entirely hidden, and there are many intermediate stages of contraction. 



The foot-disc is well marked and strongly adherent. The rows of principal 

 verrucae, usually twenty-four in number, are well seen, especially on the distal portion 

 of the column, where also secondary alternating series are visible. The pseudo- 

 acroragi, terminating each principal row of verrucse, are distinct, emphasizing greatly 

 the parapet. The tentacles are in four (6 + 6 + 12 + 24 = 48), or five (6 + 6 + 12 

 + 24 + 48 = 96) cycles. 



The sphincter is endodermal and circumscribed. The oesophagus is longitudinally 

 folded, and two well-marked siphonoglyphs are present. The mesenteries in the 

 specimens examined are all hexamerously arranged, and in the larger specimens in four 

 cycles, of which three are complete. The longitudinal and parieto-basilar muscles 

 (PI. 3, Fig. 19) are well developed. Two pairs of directive mesenteries bear the usual 

 relation with the siphonoglyphs. The longitudinal muscles of the oral disc and 

 tentacles (PI. 3, Fig. 21) are ectodermal. Zoanthellae occur throughout the endoderm, 

 being especially abundant in the tentacles (PL 3, Fig. 21). Reproductive elements 



