556 Prodromus of the 



4—7 fthms, Forbes, Fleming ; Faroe Is., Steenstrup ; Green- 

 land, Ehrenberg, Steenstrup ; Grand Manan Is., Bay of 

 Fundy, and Owls Head, Maine, Stimpson ; * " Mass. Bay, 

 Agassiz and Gould." 



CALVADOSiA.f H. James-Clark. 

 Disc infundibuliform ; the eight arms nearly equidistant, 

 prominent : pedicel monocamerous with four equidistant 

 rounded pilasters : tentacles in groups on the end of the 

 arms close to the aboral edge ; outer row pistilliform, and 

 having the same function as the anchors in other genera ; 

 radial and transverse diameter of the group equal : an- 

 chors none : genitals, transversely folded bands extending 

 to the end of the arms ; the digitiform bodies alone ex- 

 tend across the proximal end of the partition : muscle 

 of the pedicel a continuous thin layer of transversely 

 disposed fibrilloB, forming a cylinder between the outer 

 and inner walls, and imbedded in the gelatiniform layer : 

 the principal muscles of the disc ligulate, each one extend- 

 ing from the proximal end of a partition to the end of an 

 arm ; marginal muscle ligulate, moderately thick, but at 

 the outer base of the tufts of tentacles very thin : gelatin- 

 iform layer thickest at the edge of the disc, but thins out 

 almost entirely half way toward the pedicel, and then in 

 the latter grows thick again where it is divided into two 

 layers or concentric cylinders by the intervening muscular 

 cylinder; the four pilasters are also gelatiniform. and not 

 muscular, as are the pilasters in the pedicel of Lucernaria 

 quadricornis. 



* I am indebted to Jlr. Stimpson for the permission to dissect a small specimen 

 of this species, about an inch high, which he obtained at Owls Head, Maine. 



t I am indebted to my friend William Stiinpson, Esq., for the privilege of mak- 

 ing the anatomy of this gcnns; the specimen, Lucernaria campanulata Lamx. (non 

 Johnston,) was collected by him at jNIilford Haven, South Wales, in September, 

 1862, during an extensive dredging excursion, along the western coast of Great 

 Britain. [WhiNt this was in press, I also received a specimen from Keferstein, 

 which he collected at St. Vaast la Ilougue, France; — it agrees in all particulars 

 with the Milford Haven specimen.] 



