REPORT ON THE CRITSTOIDEA. 221 



The mouth leads into a funnel-shaped gullet, the internal epithelial lining of which is 

 raised into strong glandular ridges, as is the case all iilong the first part of the digestive 

 tract. There is no stomachic dilatation, but the tubular lower portion of the oesophageal 

 funnel is continued into a narrow intestine which forms one simple loop, and turns 

 upwards again to end in tlic anal opening, as shown in the riglit hand portion of 

 PL VI. fig. 5. The body-cavity is occupied by the usual loose network of connective 

 tissue, with dark brown granules dispersed through it in abundance. It is not 

 strengthened, however, by any of the calcareous rods and plates which are so often found 

 in a similar position in other Crinoids. Careful search also reveals the presence of 

 visceral blood-vessels interpenetrating its meshes ; but I have not been able to discover 

 satisfactory evidence of any water-tubes depending from the oral ring into the body- 

 cavity, although these organs must certainly be present, and are probably numerous, like 

 the water-pores on the dislc. The colour of the spirit-specimen is a light yellawish-white. 



Localities.— Station 106. August 25, 1873 ; lat. 1° 47' N., long. 24° 26 'W. ; 1850 

 fathoms; Globigerina ooze; bottom tem2:)erature, 36°'6 F. {l°'8 C). Stem-fragments only 

 {Jide C. W. T.). 



Station 147. December 30, 1873; west of the Crozets ; lat. 46° 16' S., long. 48° 27' E.; 

 1600 fathoms; Diatom ooze; bottom -temperature, 34°'2 F. (0°"8 C). "One or two 

 complete specimens and several fragmentary portions" (Jide C. W. T.). 



The stem-fragments from Station 106 seem to have been mislaid; as neither Mr. 

 Murray nor I have been able to find them in the collection of Crinoids which was in 

 Sir Wyville's hands at the time of his death, and was subsequently sent on to me. But 

 the characters of the stem are unmistakable, being utterly difierent from those of either 

 Bathycrinus or Rhizocrinus ; and unless the fragments in question belonged to a new 

 generic type altogether, which seems improbable, I see no reason for doubting Sir 

 Wyville's identification of them with the Hyoco'inus which he di-edged four months later 

 at Station 147. The point is one of some interest as regards distribution, for Station 

 106 is in the Mid Atlantic, just north of the Equator, while No. 147 is in the Southern 

 Ocean, 30 miles to the westward of the Crozet group. 



The mention of " one or two complete specimens " said to have been obtained at this 

 Station is unfortunately somewhat ambiguous. The original of figs. 1-4 on PI. VI. 

 seems to have been obtained in a fiiirly complete condition, lacking, however, the 

 attached portion of the stem ; but I am sorry to say that the stem and the head have 

 since parted company. Another stem-fragment was sent me with portions of the thin 

 basals still in connection with its upper end, and also two fragments of the disk, one with 

 four of the oral plates (PI. VI. fig. 5), and the other with the remaining plate (PL Vc. 

 fig. G). These were mounted in balsam by the late Dr. von WiUemoes Suhm, and doubtless 

 belong to the stem-fragment' just mentioned, but the greater part of the cup is wanting. 



Su" W}^'ille concluded his first account of Hyocrinus by a reference to a specimen 



