STILIFER. 199 



larium ; but he scarcely gave any other result of his ob- 

 servations. The late Mr. Stewart of the College of 

 Surgeons (whose untimely death is still deplored by all 

 who study the British Echinodermata) was of opinion 

 that S. Turtoni infests Echini for the sole purpose of 

 depositing its spawn. We know, from the observations 

 of Mr. Peach, that Lamellaria perspicua resorts to the 

 shore between tide-marks at Wick, every spring, and 

 makes a nidus for its spawn in Leptodinum punctatum, 

 one of the compound Tunicata. But Lamellaria is not, 

 like Stilifer, restricted to a particular habitat. The 

 former attaches itself to the underside of loose stones, 

 and is also found generally distributed over the sea-bed, 

 except perhaps in the spawning-season. Very few in- 

 dividuals of the species of Echinus on which S. Turtoni 

 has been taken are covered with spawn ; and Stilifers of 

 all ages, from one to half a dozen, occur on Echini, and 

 nowhere else. The Shetland specimens are larger than 

 those from Plymouth. One found by Miss Backhouse 

 is said to be f of an inch long ; I have not seen it. 

 Mr. Alder has failed to detect, notwithstanding repeated 

 examination, any traces of a denticulation or spinous 

 tongue. He says that " the otolites are circular, with a 

 central dot, that the gill consists of a single series of trian- 

 gular lobes, and that the mouth breaks up into squarish 

 angular fragments, not crystalline, perhaps horny/' 



The name of the present species has been spelt in two 

 ways. We have S. Turtoni of Broderip and S. Turtonii 

 of Loven. The former seems to be correct, according 

 to a precedent of inverted translation which we find in 

 the case of Galenus becoming Galen. I am not 

 aware, however, of any rule for Latinizing modern pro- 

 per names. Euphony is often consulted in such mat- 

 ters, and is preferable to pedantry although it would 



