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found in one specimen, and as the shape of the anchors is much 

 alike (the width of the arms is in both figured anchors ca. 70 %> 

 of the anchor-length) I do not see any reason for separating astrolabi 

 from maculata. Also Selenka's species agassizii must be regarded 

 as synonymous with maculata. Selenka's description of the colour 

 (olive-green with olive-brown stripes) agrees rather well with the 

 typical colour of maculata, and the figure of the calcareous deposits 

 resembles the deposits of maculata so much that the slight differ- 

 ences may well be due to a less accurate drawing. 



As, in my opinion, there is no doubt that agassizii Selenka is 

 synonymous with maculata, the aberrant specimens mentioned by 

 Clark in 1920 may not be referred to this species. Most likely 

 Clark's specimens really belong to an aberrant form, but whether 

 it is a variety of one of the two hitherto known species or it is 

 a new species, it is not possible to say, as Clark has stated no- 

 thing more about them, than that they are typically white with 

 brownish stripes. 



The genus Synapia is in the collection represented by 18 nicely 

 preserved specimens and a single fragment, which are rather easily 

 separated into the following four groups: 



1. The specimens from St. Crux Island, off Zamboanga. 



2. The specimens from Sebesi (Sunda Strait). 



3. The specimens from Mauritius. 



4. The specimens from Tahiti. 



Of these the specimens from St. Crux Island represent the 

 genotype maculata, and those from Tahiti without any doubt 5. 

 oceanica (Lesson). The other groups very likely represent independ- 

 ent species, but as they are closely related to maculata and only 

 represented by three specimens, two from Mauritius and one from 

 Sebesi, I prefer to describe them as varieties of maculata, naming 

 them var. sundaensis and var. Andreae. 



A single specimen from Amboina, which I have referred to S. 

 maculata, differs in several respects slightly from the specimens 

 from St. Crux Island. Possibly it will ultimately prove to be a 

 separate form, but the question cannot be settled until more material 

 will be available. 



