MOtLUSCOlDAi 
603 
MOLLTJSCOIDA 
BY 
E. Perceval Wright, M.A., M.D., F.L.S. 
Alder, Joshua. Notices of some Invertebrata, in connexion 
with Mr. Gwyn Jeffreys\s Report on dredging among the 
Hebrides* Brit. Assoc. Report, pp. 206-208. 
Busk, G. On new genera and species of Polyzoa and Sertu- 
larians. Quar^v^Journ. Mic. Sc. vol. xv. pp* 240-244*. 
Zoophytology, plate 36. 
Claparede, E. Miscellanees Zoologiques. — V. Sur X^Loxosoma 
kefersteinii. Annal. d. Scien. Natiir* 5® serie, tome vii. 
1867, pp. 28-30, pi. 6. 
Costa, A* Osservazioni embriologiche sulla Salpa pinnata. 
Rend. Accad. di Napoli (Dec. 1866), pp. 438-440. 
Crosse, H. Note sur nn genre intermediaire entre Ics Asci- 
diens et les Mollusques lamellibranches. Journal de Con- 
chyl. (April 1867) vol. xv. pp. 101-107. 
Fischer, P. Etudes sur les Bryozoaires perforants de la famille 
des Terebriporides. Arcliiv. Mus. Hist. Natur. tom. ii. 
pp. 292-313, pi. 11. 
Hancock, Albany. On the Anatomy and Physiology of the 
Tunicata. Journ. Linn. Soc. 1867, vol. ix. pp. 309-346. 
It is not possible here to do more than call attention to a few 
of the more important facts in Mr. Hancock^s valuable memoir. 
Few genera have been described among the simple Tunicates ks 
possessing a well-developed liver. It is, however, in all suffi- 
ciently distinct, and may be found on dissection beneath the 
gland-like substance which forms a pretty thick coating over 
the stomach and intestine in all Ascidice, where it forms a 
tliin coating on the surface of the intestine. Tin's hepatic 
organ may have been known to Lister, but has escaped the 
notice of other anatomists, except Krohn. The reproductive 
organs present some degree of variety, and are described as they 
occur in Ascidia, Stycla, Cynthia, Pelonaia, Clavelina, and 
other genera. The haemal system is one of the most difficult to in- 
vestigate j the author relied almost entirely on dissection aided 
