fortn. Ili.u the eculiar arrangement of the spines on the cirri, which Darwin called most 



abnormal n Vuriviluus' //<':•</ species also *die eigentümliche Anordnung der Cirren- 



tchen des /'. findet sich bei diescr Ari wieder"), is by all means a circumstance 



in favour "i iny \ii-w tint the) are really one and the same species. 



llii'S i".>k still another species of Poecilasma from the same specimen of Palinurus^ 

 thrown on the shore of the Island * Noordwachter", one of the 'Duizendeilanden" in the Java 

 He emphasizes that t H« - main difference between this species and /'. amygdalum is in the 

 structure of the »irri : these show according t" him quite different characters, especially with regard 

 t.. t' neut nt" the spines. In this second new species /'. lenticula from Palinurus^ 



the cirri bear two long spines on the anterior face and also two short ones distally from the 

 middle of each segment; on the dorsal face, spines are onlj seen in the sutures. Aurivh 



figure ' ■ I .ii. VIII, fig. 28 to illustrate this detail of liis /'. lenticula but this 

 figure shows only spines in the sutures, on the anterior as well as on the dorsal side! Some 

 confusion either in the figures or in the descriptions given by Aurivlllius must have taken 

 but as lie points out that the difference in the arrangement of the spines is the most 

 essen tial, one cannot help thinking that alter all the reason for separating two forms of Poecilasma 

 as differei t species, which closelj resemble one another in other regards and live together on 

 the carapaci ol the same specimen of Palinurus, is not a very strong one. 



According to Darwin Poecilasma fissum occurs at the Philippines; according to W'i ltni r ' 

 it has been collected by Fischer at New Caledonia. by Whitelegge at Port Jackson, by himself 

 at Jaluit (on Palinurus) and by Schaüinsland at Honolulu. 



The label accompanying the "Siboga" specimens only says that they were found on a 

 Palinurus at Ternate. 



- Poecilasma excavatum n. sp. PI. I, fig. 5 — 10. 



Capitulum with seven valves, the scutum being divided into two segments by a fissure 

 nearly parallel to the occludent margin. Tergum with an excavation in the scutal margin near 

 tli- occludent margin to receive the tip of the occludent segment of the scutum. Carina narrow, 

 keeled near the inferior extremity, terminating in a disc. 



General appearance. Capitulum oval, less than twice as long as broad, with the 

 apex pointed, rather thick, swollen. Valves unitcd without chitinous interspaces, peduncle cylin- 

 drical, narrow where it is attached to the capitulum (PI. I, lig. 5). 



5i u turn. The larger segment strongly bowed, with a short basal margin and pointed 



apex. There is a tracé ,,f a n internal basal rim, but no tooth at the rostral angle is present. 



I.ike the other valves the scutum is very delicately striated. The smaller segment is also 



distinctly bowed, it terminates in a point at the base and has the tergal margin rounded so 



tly into the excavation of the tergum. 



Tergum triangular with a very characteristic excavation at the scutal margin near the 

 rgin PI. I. fig. 6). 



1 eim h dem l'aciric (Schaüinsland 1896 — 97). Cirripedien. Zoologische Jahrbtlchcr. 



[1,1 (| I H7- 



