THE VOYAGE OF H.M.S. CHALLENGER. 
*>*» 
Station 4b. 
Qroaxum* n ton 
TIM He IF ACE. 
Thelepus cincinnatus (Fabricius), var. canadensis , nov. One specimen; obtained at 
no other locality by the Challenger. The species recorded 
from North Atlantic (“ Knight Errant,” &c.). 
Myzostomida (Graff, Zool. pts. 27 and 61). 
Myzostoma gigas, Liitken. On Antedon eschrichti. 
,, fimbriatum, n.sp. On Antedon quadrata. 
Brachyura (Miers, Zool. pt. 49). 
Hyas aranea (Linn6). One specimen ; obtained at no other locality by the 
Challenger. Recorded from Arctic, North Atlantic, and North Pacific. 
,, coarctata , Leach. One specimen ; obtained also at Station 49, 85 fathoms. 
Polyzoa (Busk, Zool. pt. 30). 
Eschara elegantula, d’Orbigny. Obtained at no other locality by the Challenger. 
Recorded from North Atlantic and Arctic. 
CeUepora canal iculata, n.sp. Obtained at no other locality. 
Brachiopoda (Davidson, Zool. pt. 1). 
Trrebratulina caput-serpentis, Linnd, var. septentrioncdis, Couthouy. Many speci- 
mens; obtained also at Stations 49, 142, and 145, 
85 to 150 fathoms. Recorded from North Atlantic. 
Tunic ata (Herdman, Zool pts. 17 and 38). 
Boltenia elegan-s, n.sp. Two specimens; obtained at no other locality. 
AjA'diiim despectvm, n.sp. One specimen ; obtained at no other locality. 
Excluding Protozoa, over 50 specimens of invertebrates were obtained at this 
Station, belonging to about 20 species, of which 7 are new to science ; 5 of the new 
species were not obtained elsewhere. 
Wilhmoes-Suhm states that on the cod that were caught a species of Caligus was 
fi.und, to which was attached the cctoparasitical Trematode Udonella caligorum, known 
( -‘jx-cially from Van Bcneden’s description of its ametabolous development. 
Surface Organisms. — Murray w as away in a boat in the afternoon and caught some 
largf ( nophore. Diatoms and Coccospheres were very abundant on the surface during 
the past four days. 
The- Challenger remained at Halifax, Nova Scotia, from 10.20 a.m. on May 9 till 
5.10 p.m. on May 19, 1873. 
At Hamfax 
