NOTODELPHYIDJE. MONSTRILLID.E. 



EXTEROCOLA FULGENS, P. J. Van Beneden. 



1860. Enterocola fufgens, P. J. Van Beneden, Bull. Acad. Belg. (2) 



vol. ix. p. 151, pi. i. 

 1892. Enterocola fufi/ens, (.'ami, Les Oopepodes du Boulonnais, 



p. 216, pis. xviii. nVs. 1-12 : xix. tigs. 12, 13. 



1900. ? Eaterocola fab/ens, T. Scott, 18th Kept. Fishery Board for 

 Scotland, p. 386,'pl. xiii. tigs. 21-27. 



A few specimens were obtained from fragments^ of 

 Botryllus sp., and small Ascidians found in the Kingsbridge 

 estuary. 



BOTRYLLOPHILUS RUBER, Hesse. 



1864. BotryllopMus ruber, Hesse, Ann. Sci. Nat. Zool. ser. 5, vol. i. 

 p. 845, pi. xii. ngs. 1-12. 



1901. Botryllophilus ? ruber, T. Scott, 19th Eept. Fishery Board 

 for Scotland, p. 242, pi. xvii. tigs. 15-27. 



Several examples of this curious species were obtained 

 from the same fragments of Botryllus, &c. with the Enteru- 

 cola recorded above. 



Tribe V. MONSTRILLOIDA. 



Fam. MONSTRILLID.E. 



THAUMALEUS THOMPSON!, Giesbrecht. 



1892. Thaumaleiis Thompsoni, Giesbrecht, pp. 578, 584,585, pi. xlvi. 



tigs. 7, 27, 31, 36, & 40. 

 1904. Thaumaleus Thompsoni, T. Scott, 22nd Kept. Fishery Board for 



Scotland, p. 248, pi. xiv. figs. 1-4. 



Description of female. Length about 1 mm. Cephalo- 

 thorax about equal in length to the abdomen. Forehead 

 broadly rounded. Antennules short, equal to about one- 

 fourth the entire length of cephalothorax and abdomen, 

 three- (or very indistinctly four-) jointed. Abdomen com- 

 posed of two segments; first segment slightly longer and 

 rather more dilated than the last thoracic segment ; second 

 segment about two-thirds the length of the first, and much 

 narrower at the proximal end, but becoming considerably 

 wider posteriorly, as shown in Dr. Giesbrecht's figure 31. 

 Three furcal setse. Genital filaments reaching to slightly 

 beyond the extremity of the furcal hairs. 



The male. The male is rather smaller than the female, 

 and measures about '83 mm. It has a general resemblance 



