A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. 123 



with a request that he furnish me with some notes upon it. These notes he was 

 kind enough to prepare, and they are incorporated in this report in the form of 

 an appendix. As Mr. Springer is the acknowledged leader in the study of the 

 fossil crinoids his remarks upon this specimen are of peculiar interest. 



Many months ago, when the United States government was preparing to 

 undertake a detailed marine biological survey of the Philippine Islands, we in- 

 dulged in some speculation as to what might be expected in the way of new 

 crinoids. The discovery of Phrynocrinus, Gephyrocrinus , Ptilocrinus and Cala- 

 mocrinus among the stalked forms , and of the dozens of comatuhds inhabiting the 

 north Pacific, had only recently been made, opening our eyes to the fact that 

 what we did not know about the recent crinoids undoubtedly far exceeded what 

 we did; and I remember that Mr. Springer remarked that it was not improbable 

 that the " Albatross" would discover an impinnate form. Little did we suspect 

 that we had already been anticipated and that a crinoid which to all intents and 

 purposes is impinnate had been found some years before by a rival ship, the 

 " Investigator. " 



East of the Terribks; 13 fathoms .—Three specimens; two of these have 

 each twenty-five arms, five IIIBr2 series being present, developed internally in 

 1, 2, 2, 1 order; the third is smaller with only thirteen arms. 



Palk Strait, north-east coast of Ceylon.— Four specimens ; one of these has 

 twenty arms about 110 mm. long and cirri XXV, 34-40, 25 mm. to 27 mm. long; 

 another has twenty-one arms (one IIIBr series being present) and cirri XXI, 

 33-42 ; a third has twenty-two arms (with two IIIBr series developed inter- 

 nally) ; while the fourth has twenty arms, one IIBr series being absent, but its 

 loss being compensated by the development of one IIIBr series which, however, 

 is 4 (3-1-4) instead of 2 as usual. 



Off the Ganjam Coast {Madras Presidency), 8 miles E.S.E. of Kalingapatam 

 Light-House ; 28-30 fathoms.— One medium-sized specimen. 



Ganjam Coast ; 24-30 fathoms.— One small twelve-armed specimen. 



Arrakan Coast, Burma. — Two specimens, each with twenty-two arms, two 

 IIIBr series being developed internally; one has 35-42 cirrus segments, the 

 . other 47. 



F Arrakan Coast. — One medium-sized specimen. 



India. — One medium-sized specimen. 



? India. — Six medium-sized specimens. 



Remarks.— Two of the specimens from Palk Strait are parasitized by a small 

 species of Eulima, but the specimens of it are too much eroded for definite 

 determination. Eidima has previously been found parasitic on Ptilocrinus pin- 

 natus (E. ptilocrinicola) from the Queen Charlotte Islands, off British Columbia, 

 in 1,588 fathoms ; on Capillaster multiradiata horn Singapore, littoral (E. capil- 

 lastericola) , and on Stenometra dorsata horn Japan. The first two species were 

 described by Professor Paul Bartsch. while the specimens of the third have 



