340 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



feature has caused us to propose the variety marginata for none of 

 the published figures indicate such marginal threads. 



Calvet, 1907, on the advice of Waters identified Smittia ensifera 

 Jullien, 1903, with Smittia ophidiana Waters, 1879. We belive that 

 this identification is exact. We have found the species of Jullien, 

 1903 as a Miocene fossil at Bowden, Jamaica but here the measure- 

 ments of the peristomice are much larger. 



The variations of Smittina are so great that we prefer to preserve 

 the synonymy of Calvet in order to avoid the multiplication of 

 species with slight differences. A species like Smittina ensifera Jullien, 

 1903, with a great geologic distribution (Burdigalian-Recent) is 

 necessarily quite variable. Its geographic distribution was also very 

 large. 



Biology. — The ectocyst of our living specimens was of clear rose 

 color. The larva affixes itself on various substrata; bryozoa (Rete- 

 pores or Cellepores), fragments of shells or small calcareous grains 

 but always irregular. The colony rarely develops on a plane surface. 

 Our variety appears particular to coralline bottoms. It was in repro- 

 duction and fixation February 15-18, 1908 (18-34 meters). 

 Occurrence. — 



D. 5141. Jolo Light Jolo; 6° 09' N.J 120° 58' E.; 29 fathoms; 



co. S. 

 D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121° 02' 15" E.; 19 



fathoms; co. S. 

 D. 5147. Sulade Islands, Sulu Archipelago; 5° 41' 40" N.J 120° 



47' 10" E.; 21 fathoms; co. S. sh. 

 D. 5149. Sirun Island, Sulu Archipelago; 5° 33' N.; 120° 42' 



10" E.; 10 fathoms; co. Sh. 

 D. 5151. Sirun Island, Sulu Archipelago; 5° 24' 40" N.; 120° 

 27' 15" E.; 24 fathoms; co. S. sh. 

 Geographic distribution (S. ophidiana). — Mediterranean: Naples. 

 Atlantic: Pico-Fayal, Azores (80-130 meters). 



Cotypes. — Cat. Nos. 8114, 8115, U.S.N.M. (var. marginata). 



SMITTINA TRISPINOSA Johnston, 1838 



Plate 41, figs. 1-3 



1923. Smittina trisvinosa Canu and Bassler, North American Later Tertiary 

 and Quaternary Bryozoa, Bull. 125, U. S. National Museum, p. 143, 

 pi. 22, figs. 7-14. (Bibliography.) 



This species is very variable and we catalogue in the present work 

 15 distinct varieties. Nevertheless there are some constant features. 

 The ovicell never measures more than 0.25 mm. in diameter. The 

 frontal pleurocyst is more or less finely granulated. The avicularia 

 are never placed on the median line of the zooecia. There are no 

 interareolar costules. Two to 4 spines (frequently 3). 



