Dr. H. Woodicard — Cyclosphwroma in the Piu-heck Beds. 387 



and from Kerguelen Island by the Rev. A, E. Eatoo, and from 

 Kelp, off Direction Hills, Pacific, 1431° e. long., 13° S. lat. 

 (Dr. Cunningham), 



This form shows very clearly the straight lateral margins of the 

 epimera of the thoracic segments. The head in Cyclospli(^roma is 

 much larger than in Cassidina, and the general form of the body of 

 the recent genus is more ovate and the bead mucb more narrow in 

 front than it is in the fossil form. 



3. Cassidina macdlata, Studer. (PL XIV, Fig. 4.) 



Anhang. zu den Abhandlung. der k. Ak-ad. der Wissensch. Berlin, 

 1883 (1884), p. 20, Tab. ii, fig. 7 (from Kerguelen Island). 



The figure of C. maculata is after Studer, and I have unfortunately 

 been unable to examine an actual specimen of this species. The 

 form of the telson resembles that of Cyclosphceroma. 



4. Sph^roma curtum, Leach. (PI. XIV, Fig. 5.) 



See " British Sessile-eyed Crustacea," Bate & Westwood, 1868, 

 vol. ii, p. 412 (woodcut figure in text). 



This specimen has been redrawn for me by Miss G. M. Woodward 

 from an actual specimen from Devonshire, x 6 nat. size. In the 

 straighter sides of the body, the broader head, the position of the 

 eyes, the pointed form of the telson, and the finely granulated 

 ornamentation of the body-segments, this little species comes very 

 close to the Purbeck fossil. 



5. Sph^roima gigas. (PI, XIV, Fig. 6.) 

 From Kerguelen Island ; x 2 nat. size. 



This, like the preceding species of Sphcsroma, offers many 

 interesting points for comparison with the fossil form, in the 

 broad head and the pointed telson, as well as in the finely granulated 

 ornamentation of the body-segments. 



Notwithstanding the fact that Cyclosphceroma trilobatiim so far 

 exceeds Sphcsroma gigas and the great majority of living 

 Sphseromids in size, yet the deep-sea dredge has brought to light 

 several extremely large Isopods such as Batliynomus {giganteus ?), 

 dredged off' the coast of Bombay in 696 fathoms (measuring 

 about 4 inches in length and 2 inches in breadth), originally 

 described by Professor Alphonse Milne-Edwards from the West 

 Indies. (See Comptes Bendus, Paris, 6 January, 1879, p. 21. 

 A translation of Milne-Edwards' paper appeared in the Ann. and 

 Mag. Nat, Hist., ser. 5, vol. iii, pp. 241-243.) 



Professor Alex. Agassiz writes : " From the collection made in 

 the West Indian region only a single species of Isopod, Bathynomus 

 giganteus, has been described, but this is hy far the largest Isopod 

 hiown, and is more than eleven inches long! The eyes of this giant 

 are placed on the lower side of the head, and consist, according to 



