4 TRANSACTIONS, NATURAL HISTORY SOCIETY OP GLASGOW. 



mentioned a peculiar female differing from A. prolifer in its 

 more elongated form (forty-five segments), but more conspicuously 

 in the fact that it carries its eggs, not in a single rounded mass, 

 but in a number — eight in the one specimen obtained. I have 

 not, so far, succeeded in identifying this satisfactorily. 



Towards the end of September, headless sexual portions of 

 large Syllids were observed swimming about at the surface, dis- 

 charging their gametes. 



Mollusca. — Only two molluscan larvae call for special mention. 

 The first of these is the beautiful veliger of the nudibranch 

 Aegires punctilucens (d'Orb.),* with large bilobed velum, which 

 hangs down on each side, so as to give it a Pilidium-like appear- 

 ance. This was got only on one occasion — on 29th August. 



Lamellaria. — A beautiful Echinospiroid pelagic larva, with 

 large glassy shell, was obtained on 29th August. Dr. Paul 

 Pelseneer recognised the specimen at once as the larva of 

 Lamellaria. As L. perspicua (Linn.) occurs on the Clyde, the 

 larva in question is in all probability to be referred to this 

 species. 



Echinoderm Larvae. — Four different larval forms of Echino- 

 derms were conspicuous in the surface fauna. By far the most 

 abundant was the Ophiopluteus larva of Ophiothrix fragilis 

 (Abilg.), which occurred in large numbers on various occasions 

 during September. Plutei of Echinus occurred in numbers on 

 10th August, but were only seen occasionally on other dates. 

 The magnificent pluteus of Spatangus purpureus appeared ir- 

 regularly in small numbers. 



Besides these, occasional barrel-shaped larvae of Synapta and 

 other Holothurians appeared. 



Polyzoa. — The well-known Cyphonautes type of larva fre- 

 quently occurred in large numbers near the shore. It is note- 

 worthy that the Cyphonautes was not the familiar C. compressus 

 — now known to be the larva of the common Polyzoon Mem- 

 branipora pilosa — but G. schneideri, Lohmann, which was 



* Mr. Bles informs me that he succeeded, in 1894, in company with Mr. 



Garstang, in tracing the development of this larva into the adult. 



