174 ACTINIAE OF ALIUTROS^S EXPLORATIONS M'MURRICH. 



also reacliiiiji- tlio stoiiiatodii'uni, hut being- uiiittHl to it to a less extent 

 than are tlie piiniaiies and seeondaiies. 'Die rei)i()dnctive oij;ans are 

 borne upon tlie mesenteries of the tliird and fourth cycles. Tlie lon- 

 •iitudinal muscles of the mesenteries do not form a distinct jienuon, 

 (PI. xxvii. Fig. <>7). In tlie peifect mesenteries the processes which sup- 

 poi't tlie muscle cells arise in bunches from stout elevations of the 

 mesogUea. The parieto-basilar nuiscles extend only a very short dis- 

 tance up from the base, ami in sections through the middle of the 

 column are not to l)e distinguished. No acontia ai)pear to be present. 

 The endoderm is considerably macerated, so that the form of these 

 structures, if they existed, could not be nuule out; 1 base my state- 

 ment as to their absence in the absem-e of neniatocysts in the tissues 

 lying in the body cavity, tlie iiiaceiatcd remains of the mesenterial 

 iilaments. 



(i.ims CYMBACTIS, i;^!. iiuv. 



Paractida' of moderati' size, cratcriform in shape, with the mesoglcea 

 of the column wall rather thick but soft; surface of column rugose in 

 ♦'ontracted forms, but without Ncnin -e or warts; no capitulum with 

 longitudinal ridges. Sphincter niiisch^ relatively weak, lying close to 

 the eiidodeini; margin not lobed, tentaciilate; tentacles numerous, 

 situated close to tiie margin, short, slender, not bulbous at the base. 



The form (or which I establish this genus apjiroaches somewhat in 

 appearance an ActiitcniKs, lia\ing' the short tentacles concentrated near 

 the margin as in that genus, a large poition of the disc being left un- 

 covered. The absence, however, of any bulbous enlargements or thick- 

 ening of the mesogla^a at the l)asesof the tentacles induces me to place 

 the form in a separate genus, which, from the cup-shaped form of the 

 specimens to 1).> referred to it, 1 name (lynibactis (A f'v//i// — a drinking 



Clip). 



21. Cymbactis faeculeiita, s)>. iiuv. 

 J 'lute \\\ III. I'i.ns. (i!t-71. 



No. 7:iL'. Station l.'S:>!t. l>:it. 38 ' OS' >,'. ; lonj^. lis l<» W. DciitL. 1 14 tathouis. Six 

 S|>f<iiin'lis. 



.\ll the specimens seem to be immature, as 1 did not succeed in tind 

 iiig reproductive cells in those I examined. The largest specimen 

 measured - "" in height, with a diameter at the margin of 2.5 '"'.and 

 at the base ot" l..*> ' '". 



The base is adlu'iriit. The colniiiii w liich gradually enlarges from the 

 biise to I he niaigin, prodncing a more or less cup or vase shaped form, 

 (IM. xxviii, fig. (!'.»), is rather thick Availed, but sott to the touch, the 

 mesoghea not being <»f libroiis structure but hyaline. The ectoderm 

 has macerated away from all the specimens, but when a trace of it is 



