ZOOLOGY or TEENANDO NOEONHA. 



559 



also to have more numerous ridges. The thorax is not much 

 broader than the abdomen, and the margin does not extend much 

 beyond the feet. 



Machilis, sp. 



A single specimen of a very small brown MacJiilis was taken 

 under a stone at the base of the Peak ; but, by an accident, the 

 specimen was destroyed, and w^e met with no others. 



Seira mtjsarum, n. sp. 



Miuuta, gregaria, in vita metallica, 1 mm. longa. Caput ro tun- 

 datum, hispidum ; oculi in maculis nigris fascia obscura sijepe 

 connectente.. Antenna? broviusculap, violacese, hispidse ; articulo 

 basali brevissimo, secundo et tertio subsequali basali duplo longi- 

 oribus ; articulo quarto triunciali, longissimo. Collum distinc- 

 tum. Segmentum secundum corporis (prothorax) latum, mar- 

 ginibus rotundatum ; tertium brevius, quartum multo brevius, 

 quintum longius, sextam quiuto subsequale, septimum sexto tripio 

 longius, terminalia brevia. Corpus in speciem ferme glabrum, 

 insquamosum, flavescens, segmentorum basibus et marginibus 

 cseruleo-purpureis. Pedes hi^pidi, primi breviusculi, secundi 

 longiores, tertii longissimi, graciles. 



Very abundant between the wet bases of the petioles of the 

 bananas, at the base of the Peak. 



It is very nearly allied to S. Buskii, Lubb., wliich was de- 

 scribed from specimens found in a hot-house in England, and pro- 

 bably introduced with tropical plants. It differs in the absence 

 of hairs round the neck and on the body, longer hind legs, and 

 also in coloration. The spring resembles that of S. Buskii, and 

 is rather hispid. The neck is very distinct. These small Col- 

 lembola have been mucb neglected by collectors, and it is most 

 probable that this species was introduced in the bananas. 



ECHINODERMATA* 



There were not many species of Echiuoderms found on tlie 

 island, but the following were obtained: — 



CiDAinS TRTBULOIDES, Lawk. 



Very plentiful on the north side of the island in coral-reef 

 pools, near Sanibaquichaba and Morro do Chapeo. 



* The species were determined for me by Prof. Jeffrey Bell. 



