FLORIDAN BRYOZOA. 65 



In consequence of the celleporine nature, the outer shape of tlie zocecia is very 

 irregular. Sometiraes their front side wants the pores, bnt inöst commonly it is stri- 

 ated by converging furrows, leading upwards from the only reraaining marginal pores. 

 The breadth of their aperture varies between 0,07 and 0,os mm. The ooecia present a 

 very characteristical feature in the constitntion of their front wall. This, in the 

 middle, is thinner, in an elongate space between the aperture and a transversely ellip- 

 tical hole in the tip of the ocecion, reminding of this structure in many of the liete- 

 pores. Furthermore the ocecion has its own aperture, separated, by a ealcareous plate, 

 from the lower aperture of the zocecion. The small avicularia, nearest in correspon- 

 dence to the lateral ones in the preceding Lepralia jantkina, here are placed in the 

 furrows between the zocecia. As both the colonies examined are dead, no avicularian 

 mandible is retained, but, after the form of their aperture to judge, this must have 

 been semicircular. The greater avicularia, in their size and position corresponding 

 to the zocecia and irregularly dispersed among these, have an inversely spathulate or 

 a flash-shaped form of their aperture, with its linear produced lip pointing obliqnely 

 upwards. At the articulation for the mandible, the aperture, with a breadth of about 

 0,1 min., is crossed över by a ealcareous bridge, roughly dentated on its manclibu- 

 lar side. 



As to the systematical weight of the differences of the two last-named Floridan 

 forms from the typical Lepralia edax, these, if regarded in connexion with the diffe- 

 rences between the other Lepralian forms, rather will be accounted for as indicating 

 local varieties. If eompared Avith the Lepralia cleidortorva, and Lepr. inornala, through 

 the intermediate forms of Lepr. adpressa, Lepr. Kirchevpaueri and Lepr. hippopus, 

 they are connected with these in a very natural series, where they are to be regarded 

 as the highest known differentiations. 



Far enough from this series, although, for the form of its zocecial aperture, most 

 likely to be placed in the genus Lepralia, the Floridan fauna presents a seemingly new 

 species, 



Lepralia turrita (Pl. XI, figs. 226—228). 



Char.: Zocecia erecta (quorum altitudo circ. = 0,75 mm.) dense conferta coloniam 

 planam favosam exstruunt, aperturam ellipticam (cujus latitudo circ. = 0,15 min.) ad 

 articulationem operculi aliquanto constrictam, 4 (vel interdum 5) spinis teretibus, inar- 

 ticulatis coronatam praebent. Ocecia rotunda, interdum bimucronata, media parte fron- 

 tis supra aperturam poris perforantur. Avicularia spathulata inter zocEcia sparsim ex- 

 sistunt; minora, rotunda parieti zoceciorum affixa sunt. 



Hab.: Hane speciem fragmentis Coralliorum et Nulliporis affixam e proff. 26 — 44 

 orgyarum haud frequentem cepit Pourtales. 



The great size of the zocecial aperture of this species, particu'arly if eompared 

 with the size of the front side of the zocecia, as presented in the upper surface of the 

 colony, together with the stout marginal spines, gives it the appearance rather of a 



K. Vet. Akad. Hnndl. ii. II. N:o 4. 9 



