4.-?8 TAGE Si;()(!SiiKi;r. 



(i. (). S.vns, 1861), mtidula (Fi:. Mri.LEi;, 1870), cyUudnca and au.stndt,s, G. S. BltADY, 18!»() 

 probably belonged to this group, but, on account of the unsatisfactory descriptions of these 

 forms, he could not give a definite opinion as to this. Hilgendorfi, (t. W. Muller, 1890 would 

 to a certain extent occujjy a special position. ,,Hdgendorfi erinnert dureh die Gliederung der 

 1. Antenne und die Gestalt der Furca an die Gruppe oblonga, von der freilich die Furca schon 

 recht wesentlich abweicht, dureh die allerdings luir si^iirliche Bedornung der Schwiniiuborsten, 

 die starke Vermehrung der Borsten, besonders dureh die Borsten am Dorsalrand der 1. Maxille, 

 sowie dureh die Gestalt des PutzfulJes an die Gruppe Lohiancui.''^ 



In his worlc of 1897 G. tS. BitADY sets up a new genus, Cydasterupe, closely related to 

 Astero'pe, and diagnosed it as follows (p. 85): ,,The shell is more nearly spherical than is usual 

 in Asterofe. Frontal tentacle stout, 3- (or 2?) jointed. The first joint of the mandibular foot 

 has a falcate masticatory process as in Asterope, but much more elaborately spinous; the second 

 joint, instead of being produced backwards in an angular process, bears on its distal margin 

 a- large tongue-like appendage which extends as far as the extremity of the following joint. 

 The last limb (vermiform foot) is very profusely armed with setae, many of the segments bearing 

 two or three on each lateral margin. In other respects the anatomy is that of Asterope.'^ This 

 new genus was based on investigations of two new forms, C. Hendersoni and C. orbicularis. It 

 is not directly stated which of these two species is to be regarded as typical for this genus; one 

 can, however, read between the lines that the species that is first described in the treatise, 

 ('. Hendersoni, is looked upon as the type-species by G. S. Brady. This assumption is fully 

 confirmed in G.S. Bhady's work of 1902 a. Here we read (p. 181): ..This genus was founded on 

 a species taken in Madras Harbour.'' C. Hendersoni is given (1897, p. 87) as having been 

 ,, dredged ... in Madras Harbour"; C . orbicularis is stated to have come from Valparaiso. — 

 In the work of 1902 a just quoted G. S. Brady describes three new species of the genus Cijcl- 

 asterope. At the same time he feels compelled to modify the diagnosis of the genus given in 1897. 

 On p. 181 we read: ,,The shape of the shell can no longer be maintained as a generic character, 

 several other species having been discovered, which with a very different foriu of shell combine 

 the other distinctive characters of Cydasterupe. The points which I now suggest as diagnostic 

 (it the genus are the presence of a digitiform process on the peiuUtimate joint of the mandibular 

 foot, the profusely setiferous character of the vermiform limb, each ring of which toward the 

 distal extremity usually supports two or three setae, and the spinous armature of the joints 

 of the swimming-branch of the antenna." 



In his work of 1906 b G. W. MCller adopts the generic name Cy cluster ope. At the 

 same time he points out, however, that a differentiation of this genus cannot be carried out on 

 the basis of the diagnosis given by G. S. Bradv, partly because the characters given by that 

 author are too indefinite, partly becauseone of them is due to incorrectobservations (the mandible). 

 G. W. Muller then adds, p. 32: ,,Trotzdem scheint eine Abgrenzung der sehr kurzen, annahernd 

 kreisformigen Arten, welche bei BliADY die Gattung Cydasterope bilden, nicht unberechtigt. 

 Dieselben charakterisiren sich scharf dureh den Ban der Furca, bei der auf 3 oder 4 kurze, 

 kriiftige, stark gebogene Dornen, welche in groBerem Abstand von einander stehen. iioc'h eine 

 groiiei-e Anzahl dicht stehender borstenartiger G(>bilde, welche sich in ihrei' Form schai'f von 



